Emojis in Subject Lines: Do They Really Boost Open Rates? (Data-Driven Guide)

Blog

January 9, 2025

Emojis in Subject Lines: Do They Really Boost Open Rates? (Data-Driven Guide)

Emojis in Subject Lines: Do They Really Boost Open Rates? (Data-Driven Guide)

Blog

January 9, 2025

Emojis in Subject Lines: Do They Really Boost Open Rates? (Data-Driven Guide)

Emojis in Subject Lines: Do They Really Boost Open Rates? (Data-Driven Guide)

Blog

January 9, 2025

Emojis in Subject Lines: Do They Really Boost Open Rates? (Data-Driven Guide)

Unlock the power of emojis in email subject lines! This guide shows you how to boost open rates, engage your audience, and craft campaigns that stand out—all backed by actionable insights and real-world examples.

In today’s overflowing inboxes, grabbing attention isn’t just a challenge—it’s a necessity. That’s where emojis come into play. These tiny visuals have become a powerful tool for brands to stand out and connect with their audience. 

But do they really boost engagement, or are they just a passing trend? In this guide, we’ll explore the psychology behind emojis, examine real-world data, and share best practices for using them effectively. By the end, you’ll know how to leverage emojis to craft subject lines that not only catch the eye but also drive higher open rates—all backed by actionable insights and research.

Section 1: The Psychology Behind Emojis in Subject Lines

Emojis are more than just playful visuals—they’re a psychological tool that can transform how subject lines are perceived. If you’re looking for ways to refine your email strategy, check out these segmentation tips to better connect with your audience. Emojis create an immediate connection with readers by combining visual appeal with emotional triggers, helping your email stand out in crowded inboxes. Here’s why they work so effectively:

Why Emojis Work:

  • Visual Triggers: Research shows that the brain processes images 60,000 times faster than text. Emojis are visual cues that grab attention instantly, especially when competing against plain-text subject lines.

  • Emotional Resonance: Emojis have the unique ability to convey tone, excitement, and urgency without adding length to your subject line. For example, a simple “🎉” adds a celebratory feel, while “⏰” emphasises urgency.

  • Universal Appeal: Emojis transcend language barriers, making them a versatile tool for connecting with global audiences. They help readers intuitively understand the tone or intent behind your email.

Reader Behaviour:

Emojis can significantly influence how readers interact with your emails.

  • Improved Scanning: Adobe's study found that subject lines with emojis increase engagement because they draw attention faster than plain text.

  • Higher Open Rates: Emails with emojis in their subject lines can see a significant boost in open rates, depending on the industry and the type of emoji used. For more proven methods, explore these strategies to improve open rates.

  • Examples in Action:

    • “⏰ Last Chance: 20% Off Ends Tonight!” - Creates urgency and compels action.

    • “🎉 Your Gift Is Waiting Inside!” - Adds a sense of excitement and curiosity.

    • “🌟 New Arrivals You Can’t Miss!” - Highlights exclusivity and appeal.

Section 2: Do Emojis in Subject Lines Boost Open Rates? (Data-Driven Insights)

Emojis are more than playful symbols—they are strategic tools that can significantly enhance email engagement. Here’s a breakdown of their effectiveness, supported by reliable data sources.

Emojis Increase Open Rates

Emojis in email subject lines can significantly enhance open rates. Experian reports that 56% of brands using emojis in their email subject lines experienced higher open rates. Elite Digital Agency

Additionally, Swiftpage (now Act!) found that incorporating emojis led to a 29% increase in unique open rates and a 28% rise in unique click-through rates. VibeTrace

Performance Varies by Industry

  • Retail & E-commerce: Emojis like 🎉 and 🔥 convey excitement and urgency, aligning perfectly with flash sales or limited-time offers.

  • Travel & Hospitality: Icons like ✈️ and 🌍 evoke wanderlust and create a connection with aspirational messaging, ideal for trip promotions.

  • B2B Campaigns: Subtle emojis like 📈 add a touch of relatability to subject lines while maintaining professionalism.

Impact Based on Demographics

  • Younger Audiences (18–34): Emojis align with their communication style, with 86% of users aged 24 or younger frequently using emojis, indicating a potential for higher engagement.  Content Detector

  • Older Audiences (35+): Approximately 15% of individuals aged 45 and above perceive emoji usage as inappropriate, suggesting that minimal and purposeful use is advisable for this demographic.  Sixth City Marketing

Emojis and Mobile Devices

A large portion of emails are opened on mobile devices, where emojis naturally stand out and enhance visual appeal. Testing across devices ensures emojis render correctly, as platforms like Outlook may display inconsistently.

Section 3: Best Practices for Using Emojis in Subject Lines

Using emojis in subject lines can significantly enhance open rates and engagement, but to maximise their effectiveness, it's essential to follow best practices. Here are key strategies to ensure your emojis hit the mark:

1. Use Emojis to Complement, Not Replace Words

Emojis should enhance your subject line, not overshadow or confuse the message. They are most effective when they add context or visual interest without compromising clarity.

  • Good Example: “🎁 Surprise Inside: Exclusive Offer Just for You!”

  • Bad Example: “🎁🎁🎁 Exclusive!” (Overuse can make the message appear spammy or unclear.)

2. Test for Compatibility Across Devices

Emojis render differently depending on the email client and device, with older platforms like Outlook sometimes displaying them inconsistently. To ensure your emojis appear as intended, preview your emails across Gmail, Outlook, and popular mobile clients. Tools like Klaviyo’s email preview feature or Litmus can help.

3. Keep It Relevant to the Content

The emojis you use should align with the theme and tone of your email content. Irrelevant emojis can confuse readers and detract from your message.

  • Good Example: A travel email could use ✈️ or 🌍 to evoke wanderlust.

  • Good Example: A flash sale email benefits from urgency-focused emojis like ⏰.

4. Don’t Overuse Emojis

While emojis grab attention, excessive use can make your subject line appear unprofessional or spammy. Stick to a maximum of 1–2 emojis to maintain a balance between visual appeal and readability.

5. A/B Test for Performance

Testing is essential to identify what resonates with your audience. A/B test subject lines with and without emojis to determine which performs better in terms of open rates and how to improve click-through rates. Learn more about A/B testing for email conversions to refine your campaigns.

  • Example Test:

    • Version A: “🎉 Your Weekend Just Got Better – 20% Off”

    • Version B: “Your Weekend Just Got Better – 20% Off”
      Analyse the results to optimise future campaigns.

Section 4: Subject Line Examples with Emojis (By Campaign Goals)

Urgency

Using emojis to convey urgency encourages readers to act quickly, creating a sense of scarcity or time sensitivity. Pair this approach with these email deliverability best practices to maximise inbox placement.

  1. Arrived


"Arrived email with the subject line '📣 Last hours to invest for the next expected dividends! 📣,' creating urgency for investment opportunities with megaphone emojis."

Why It Works: The emoji acts as an alert, reinforcing the urgency conveyed in the subject line. It grabs attention and pushes readers to act quickly, aligning with the time-sensitive message.

  1. Fly By Jing


"Fly By Jing email with the subject line '🚨 5 days left to get the good stuff by 12/24,' emphasizing the deadline for Christmas delivery with an alert emoji."

Why It Works: The emoji emphasises urgency, ensuring the deadline is front and centre. It encourages readers to take immediate action, making it highly effective for time-sensitive promotions.

  1. Hero Cosmetics


"Hero Cosmetics email with the subject line '⏰ <24 hours left. 20% off. The time is now.,' urging customers to take advantage of a limited-time discount with a clock emoji."

Why It Works: The emoji highlights the exclusivity and time sensitivity of the deal. It pairs effectively with the direct discount offer, prompting quick engagement.

  1. Hulu


"Hulu email with the subject line '$1.99/month Hulu. Just For You: LIMITED TIME OFFER. ⏳,' highlighting a special subscription deal with an hourglass emoji to signal urgency."

Why It Works: The emoji strengthens the countdown message, creating a sense of immediacy. Combined with the compelling offer, it drives urgency and personalisation, enticing the reader to act now.

  1. Pampa 


"Pampa email with the subject line 'FLASH SALE | 20% off our Ponchos & Scarves 🔥,' promoting a flash sale with a fire emoji to amplify excitement."

Why It Works: The emoji conveys excitement and scarcity, complementing the flash sale announcement perfectly. It evokes urgency and FOMO, encouraging immediate clicks.

Excitement

Excitement-driven subject lines, enhanced with emojis, create enthusiasm and encourage readers to open the email.

  1. 4Knines


"4Knines email with the subject line '🎉 We've Got Big News!' showcasing an exciting announcement."

Why It Works: The emoji immediately conveys celebration and excitement, encouraging curiosity. It sets a positive and engaging tone for the announcement.

  1. Diaspora Co.


"Diaspora Co. email with the subject line 'Your fave chillies are back! 🔥,' announcing the return of popular products."

Why It Works: The emoji aligns with the spicy theme of chillies, making it visually and contextually relevant. It evokes enthusiasm and urgency, enticing readers to explore further.

  1. Dick’s Sporting Goods


 "Dick's Sporting Goods email with the subject line '🙌 Get Ready for Exclusive Offers, Big Deals & More...Delivered Right to Your Inbox!' emphasizing upcoming promotions."

Why It Works: The emoji grabs attention, creating a sense of anticipation. It pairs well with the message of exclusivity, drawing readers to open the email for details.

  1.  The Sill


 "The Sill email with the subject line 'It's our birthday—here's a gift for YOU! 🎁,' celebrating their anniversary with a customer gift."

Why It Works: The emoji instantly signals celebration and generosity, drawing attention to the subject line. The personalised "gift for YOU" phrase creates excitement and encourages the recipient to open the email, perfectly aligning with the celebratory tone.

  1. SimpleBits


"SimpleBits email with the subject line '✨ Grand Opening! Introducing Simple Type Co.' announcing the launch of a new product or brand."

Why It Works: The emoji adds an element of excitement and elegance, perfectly complementing the announcement of a new launch.

Seasonal Offers

Emojis tied to seasons or holidays like Black Friday, make subject lines more relevant and visually appealing during specific times of the year.

  1. Cheeky Bonsai


"Cheeky Bonsai email with the subject line 'A V-Day Treat For You ❤️,' offering a special Valentine's Day promotion with a heart emoji for a festive touch."

Why It Works: The heart emoji reinforces the Valentine’s Day theme, evoking warmth and affection. It connects emotionally with the audience while highlighting the subject’s relevancy. Seasonal emojis also enhance visibility in crowded inboxes.

  1. Krispy Kreme


"Krispy Kreme email with the subject line '🍁 Spice up Your Fall! Pumpkin Spice Is Back!,' announcing the seasonal return of pumpkin spice treats with a fall-themed maple leaf emoji."

Why It Works: The autumn leaf emoji complements the seasonal message, instantly tying the subject line to the fall theme. This creates relevance, and the playful tone builds anticipation for the product.

  1. Lifesum


"Lifesum email with the subject line '🎃 50% Off - Treat yourself to a health boo-st!,' offering a Halloween-themed discount with a pumpkin emoji for seasonal appeal."

Why It Works: The Halloween-themed pumpkin emoji adds festive charm while tying into the playful tone of “boo-st.” It’s seasonally relevant, eye-catching, and blends promotion with festivity.

  1. MacPaw


"MacPaw email with the subject line '🎄 Ho-ho-holiday sale is here! 🦌,' promoting a festive holiday sale with a Christmas tree and reindeer emoji."

Why It Works: The Christmas tree and reindeer emojis immediately set a holiday tone, creating excitement and urgency. The whimsical subject line effectively attracts attention in festive inbox clutter.

  1. Methodical Coffee


"Methodical Coffee email with the subject line '☕ The Return of Winter Bloom ❄️,' celebrating the return of a popular seasonal coffee blend with a snowflake emoji for winter vibes."

Why It Works: The coffee and snowflake emojis pair beautifully with the seasonal theme, subtly highlighting the product while evoking cosy, winter vibes. The imagery is both relevant and inviting.

Personalisation

Combining emojis with personalisation (like first names) creates a direct, friendly approach that resonates with readers.

  1. Absolut


"Absolut email with the subject line 'Smiles Davis, be the first to know about 4 NEW flavors 😁,' personalized with the recipient's name and featuring new product updates."

Why It Works: Personalising with the recipient's name and the emoji creates a friendly and inviting tone. It makes the email feel exclusive, boosting engagement.

  1. Booking.com


"Booking.com email with the subject line 'Need a flight for your trip, Smiles Davis? ✈️,' offering travel assistance tailored to the recipient."

Why It Works: The emoji reinforces the travel context, making the subject line more engaging and visually appealing. Combining it with personalisation shows relevance.

  1. Brilliant


"Brilliant email with the subject line 'Smiles Davis, here's your rundown for June 🧠,' delivering a personalized monthly update."

Why It Works: The emoji adds a seasonal vibe, aligning with a summer theme. The inclusion of the recipient's name further personalises the email.

  1. Busuu


"Busuu email with the subject line 'Smiles Davis, we've not seen you in a while 😢,' attempting to re-engage the recipient."

Why It Works: The emoji conveys concern, adding an emotional touch. It makes the email feel more genuine, encouraging lapsed users to re-engage.

  1. Kroger


"Kroger email with the subject line 'Smiles Davis, Your Yearly Checkout + Exclusive Deals Are Here 🎉,' combining personalized annual insights with exclusive offers."

Why It Works: The emoji reflects celebration and exclusivity. Pairing it with the recipient's name makes the message feel tailored and important.

Source (All Examples): Really Good Emails

Section 5: Tools to Test and Optimise Emojis in Subject Lines

Using emojis effectively in subject lines requires the right tools to ensure compatibility, performance, and deliverability. Here’s a curated list of essential resources to help you optimise your emoji usage, craft engaging subject lines, and avoid common pitfalls.

1. Emojipedia

Emojipedia is your go-to resource for exploring and copying emojis. The platform provides detailed information about each emoji, including its meaning and how it renders across different platforms like iOS, Android, and web clients.

  • Why It’s Useful: Ensures emoji relevance and compatibility with your brand message.

  • Key Feature: Preview how emojis look on various devices before using them in subject lines.

  • Link: Emojipedia

2. Klaviyo A/B Testing

Klaviyo’s A/B testing feature lets you test subject lines with and without emojis, making it easier to optimise performance. Dive deeper into Klaviyo’s predictive analytics to personalise your approach. By comparing open rates and CTRs, you can refine your approach for future campaigns.

  • Why It’s Useful: Provides data-driven insights to optimise subject line performance.

  • Key Feature: Easily test variables like emoji placement and tone within Klaviyo’s platform.

  • Link: Klaviyo

3. Litmus

Litmus enables you to preview how emails, including emojis, render across different email clients (e.g., Gmail, Outlook, Apple Mail) and devices. It ensures your subject lines look consistent and professional, regardless of where they’re viewed.

  • Why It’s Useful: Prevents display issues caused by emoji incompatibility on older or less common email clients.

  • Key Feature: Comprehensive testing for both desktop and mobile devices.

  • Link: Litmus

4. Google Postmaster Tools

This tool helps you monitor email deliverability and spam rates. By identifying potential triggers caused by excessive emoji use, you can ensure your emails land in your subscribers’ inboxes rather than spam folders.

  • Why It’s Useful: Provides actionable insights to maintain high deliverability rates.

  • Key Feature: Analyses sender reputation and spam triggers.

  • Link: Google Postmaster Tools

5. Subject Line Testers (CoSchedule/SubjectLine.com)

Platforms like CoSchedule and SubjectLine.com analyse your subject lines for length, tone, and effectiveness, offering actionable feedback on emoji usage and placement. These tools also suggest improvements in readability and engagement.

  • Why It’s Useful: Ensures your subject line balances emotional appeal with clarity and professionalism.

  • Key Feature: Real-time scoring and suggestions to maximise engagement.

  • Link: CoSchedule Headline Analyzer | SubjectLine.com

6. Mail Tester

Mail Tester evaluates your email’s deliverability by identifying issues like spam triggers, improper formatting, and overused emojis. By providing a detailed score, it helps you optimise both your subject lines and email content.

  • Why It’s Useful: Minimises the risk of being flagged as spam due to emoji misuse.

  • Key Feature: Comprehensive deliverability checks with specific recommendations.

  • Link: Mail Tester

Section 6: Common Risks and How to Avoid Them

While emojis can significantly boost engagement and open rates, improper use can lead to reduced effectiveness or even harm your email marketing efforts. Here’s a breakdown of common risks and actionable solutions to avoid them.

Spam Filters

  • Risk: Overusing emojis or placing them in irrelevant positions can trigger spam filters, reducing deliverability. Avoid common mistakes with these email marketing tips.

  • Solution: Limit emoji use to 1–2 per subject line. Test deliverability using tools like Mail Tester or Google Postmaster Tools to identify potential spam triggers.

Cultural Misinterpretation

  • Risk: Emojis can have different meanings depending on cultural and regional contexts, leading to unintended messages.

    • Example: The 👍 emoji may seem positive but could imply sarcasm in certain cultures.

  • Solution: Research emoji meanings for your target audience. Use platforms like Emojipedia to verify their cultural appropriateness and ensure they align with your campaign goals.

Mobile Display Issues

  • Risk: Some devices or outdated email clients (e.g., older versions of Outlook) may not support certain emojis, resulting in garbled text or empty boxes.

  • Solution: Stick to universally recognised emojis such as 📧 (email), 🎉 (celebration), or ⏰ (urgency). Preview emails across multiple devices using tools like Litmus to ensure proper rendering.

Potential Drawbacks of Emoji Use

While emojis can enhance subject lines, they also carry risks if misused:

  • Overuse: This can make emails look unprofessional or spammy.

  • Misinterpretation: This could confuse or alienate recipients if the emoji’s meaning is unclear.

  • Brand Mismatch: Emojis may dilute your brand's professionalism if they don’t align with its tone or theme.

Section 7: Long-Term Strategy for Emoji Use in Email Campaigns

Emojis are not just a short-term trend—they can be a valuable component of your email marketing strategy when used thoughtfully over time. To maximise their effectiveness, you need a long-term plan that includes testing, analysis, and seasonal relevance.

Create a Testing Framework

  • Experiment with subject lines using emojis in combination with other elements like tone, length, and keyword placement. Rather than focusing solely on the presence of emojis, test how they complement the message. 

  • Example: Test the emoji placement—at the beginning, middle, or end of the subject line—and adjust based on the results.

Analyse Metrics Across Campaigns

  • Dive into metrics like open rates, CTR, and conversions for various campaigns to identify trends in emoji performance.

  • Segment your audience: Compare how different demographics (e.g., younger vs older audiences) respond to emoji use.

Plan for Seasonality

  • Incorporate emojis into seasonal campaigns to align with audience expectations and maximise engagement. Knowing the best times to send newsletters can amplify your efforts.

    • Example: Use 🎃 for Halloween, 🎄 for Christmas, and 🌸 for spring promotions.

  • Schedule emoji-based campaigns around major events, product launches, or promotional periods.

Consistency and Audience Alignment

  • Develop emoji guidelines to ensure consistency across campaigns while maintaining alignment with your brand voice.

  • Tailor emojis to audience preferences by reviewing past campaign performance and testing new ideas.

  • Avoid overuse by setting limits on emoji frequency within your email strategy.

Iterate and Evolve

  • Reassess your emoji strategy periodically to adapt to audience behaviour, technological changes, and market trends.

Conclusion

Emojis in subject lines have proven to be more than just a trend—they're a valuable tool for grabbing attention, creating emotional connections, and driving higher engagement. When used thoughtfully, emojis can transform your email marketing efforts, making your campaigns more relatable, visually appealing, and impactful. 

However, success lies in the balance—overuse or misalignment with your brand can backfire. By following best practices, leveraging the right tools, and analysing audience behaviour, you can harness the full potential of emojis to create email subject lines that stand out in today’s crowded inboxes.

Key Takeaways:

  • Emojis = Instant Attention: Stand out in crowded inboxes with eye-catching visuals.

  • Tailored for Your Tribe: Younger audiences crave them, while older readers value a classy touch.

  • Industry Heroes: Retail and travel campaigns thrive with emojis—perfect for flash sales or wanderlust vibes.

  • Less is More: A sprinkle of 1–2 emojis can boost engagement without hitting the spam folder.

  • Supercharge with Tools: Leverage Klaviyo, Litmus, and Mail Tester to ensure perfect performance.

  • Seasonal Spark: Match emojis to holidays and trends for campaigns that feel timely and exciting.

Tired of Low Open Rates? 

Discover How Emojis Can Help! Click here to learn how to use emojis strategically, backed by data and real-world examples, to boost engagement and connect with your audience like never before!




In today’s overflowing inboxes, grabbing attention isn’t just a challenge—it’s a necessity. That’s where emojis come into play. These tiny visuals have become a powerful tool for brands to stand out and connect with their audience. 

But do they really boost engagement, or are they just a passing trend? In this guide, we’ll explore the psychology behind emojis, examine real-world data, and share best practices for using them effectively. By the end, you’ll know how to leverage emojis to craft subject lines that not only catch the eye but also drive higher open rates—all backed by actionable insights and research.

Section 1: The Psychology Behind Emojis in Subject Lines

Emojis are more than just playful visuals—they’re a psychological tool that can transform how subject lines are perceived. If you’re looking for ways to refine your email strategy, check out these segmentation tips to better connect with your audience. Emojis create an immediate connection with readers by combining visual appeal with emotional triggers, helping your email stand out in crowded inboxes. Here’s why they work so effectively:

Why Emojis Work:

  • Visual Triggers: Research shows that the brain processes images 60,000 times faster than text. Emojis are visual cues that grab attention instantly, especially when competing against plain-text subject lines.

  • Emotional Resonance: Emojis have the unique ability to convey tone, excitement, and urgency without adding length to your subject line. For example, a simple “🎉” adds a celebratory feel, while “⏰” emphasises urgency.

  • Universal Appeal: Emojis transcend language barriers, making them a versatile tool for connecting with global audiences. They help readers intuitively understand the tone or intent behind your email.

Reader Behaviour:

Emojis can significantly influence how readers interact with your emails.

  • Improved Scanning: Adobe's study found that subject lines with emojis increase engagement because they draw attention faster than plain text.

  • Higher Open Rates: Emails with emojis in their subject lines can see a significant boost in open rates, depending on the industry and the type of emoji used. For more proven methods, explore these strategies to improve open rates.

  • Examples in Action:

    • “⏰ Last Chance: 20% Off Ends Tonight!” - Creates urgency and compels action.

    • “🎉 Your Gift Is Waiting Inside!” - Adds a sense of excitement and curiosity.

    • “🌟 New Arrivals You Can’t Miss!” - Highlights exclusivity and appeal.

Section 2: Do Emojis in Subject Lines Boost Open Rates? (Data-Driven Insights)

Emojis are more than playful symbols—they are strategic tools that can significantly enhance email engagement. Here’s a breakdown of their effectiveness, supported by reliable data sources.

Emojis Increase Open Rates

Emojis in email subject lines can significantly enhance open rates. Experian reports that 56% of brands using emojis in their email subject lines experienced higher open rates. Elite Digital Agency

Additionally, Swiftpage (now Act!) found that incorporating emojis led to a 29% increase in unique open rates and a 28% rise in unique click-through rates. VibeTrace

Performance Varies by Industry

  • Retail & E-commerce: Emojis like 🎉 and 🔥 convey excitement and urgency, aligning perfectly with flash sales or limited-time offers.

  • Travel & Hospitality: Icons like ✈️ and 🌍 evoke wanderlust and create a connection with aspirational messaging, ideal for trip promotions.

  • B2B Campaigns: Subtle emojis like 📈 add a touch of relatability to subject lines while maintaining professionalism.

Impact Based on Demographics

  • Younger Audiences (18–34): Emojis align with their communication style, with 86% of users aged 24 or younger frequently using emojis, indicating a potential for higher engagement.  Content Detector

  • Older Audiences (35+): Approximately 15% of individuals aged 45 and above perceive emoji usage as inappropriate, suggesting that minimal and purposeful use is advisable for this demographic.  Sixth City Marketing

Emojis and Mobile Devices

A large portion of emails are opened on mobile devices, where emojis naturally stand out and enhance visual appeal. Testing across devices ensures emojis render correctly, as platforms like Outlook may display inconsistently.

Section 3: Best Practices for Using Emojis in Subject Lines

Using emojis in subject lines can significantly enhance open rates and engagement, but to maximise their effectiveness, it's essential to follow best practices. Here are key strategies to ensure your emojis hit the mark:

1. Use Emojis to Complement, Not Replace Words

Emojis should enhance your subject line, not overshadow or confuse the message. They are most effective when they add context or visual interest without compromising clarity.

  • Good Example: “🎁 Surprise Inside: Exclusive Offer Just for You!”

  • Bad Example: “🎁🎁🎁 Exclusive!” (Overuse can make the message appear spammy or unclear.)

2. Test for Compatibility Across Devices

Emojis render differently depending on the email client and device, with older platforms like Outlook sometimes displaying them inconsistently. To ensure your emojis appear as intended, preview your emails across Gmail, Outlook, and popular mobile clients. Tools like Klaviyo’s email preview feature or Litmus can help.

3. Keep It Relevant to the Content

The emojis you use should align with the theme and tone of your email content. Irrelevant emojis can confuse readers and detract from your message.

  • Good Example: A travel email could use ✈️ or 🌍 to evoke wanderlust.

  • Good Example: A flash sale email benefits from urgency-focused emojis like ⏰.

4. Don’t Overuse Emojis

While emojis grab attention, excessive use can make your subject line appear unprofessional or spammy. Stick to a maximum of 1–2 emojis to maintain a balance between visual appeal and readability.

5. A/B Test for Performance

Testing is essential to identify what resonates with your audience. A/B test subject lines with and without emojis to determine which performs better in terms of open rates and how to improve click-through rates. Learn more about A/B testing for email conversions to refine your campaigns.

  • Example Test:

    • Version A: “🎉 Your Weekend Just Got Better – 20% Off”

    • Version B: “Your Weekend Just Got Better – 20% Off”
      Analyse the results to optimise future campaigns.

Section 4: Subject Line Examples with Emojis (By Campaign Goals)

Urgency

Using emojis to convey urgency encourages readers to act quickly, creating a sense of scarcity or time sensitivity. Pair this approach with these email deliverability best practices to maximise inbox placement.

  1. Arrived


"Arrived email with the subject line '📣 Last hours to invest for the next expected dividends! 📣,' creating urgency for investment opportunities with megaphone emojis."

Why It Works: The emoji acts as an alert, reinforcing the urgency conveyed in the subject line. It grabs attention and pushes readers to act quickly, aligning with the time-sensitive message.

  1. Fly By Jing


"Fly By Jing email with the subject line '🚨 5 days left to get the good stuff by 12/24,' emphasizing the deadline for Christmas delivery with an alert emoji."

Why It Works: The emoji emphasises urgency, ensuring the deadline is front and centre. It encourages readers to take immediate action, making it highly effective for time-sensitive promotions.

  1. Hero Cosmetics


"Hero Cosmetics email with the subject line '⏰ <24 hours left. 20% off. The time is now.,' urging customers to take advantage of a limited-time discount with a clock emoji."

Why It Works: The emoji highlights the exclusivity and time sensitivity of the deal. It pairs effectively with the direct discount offer, prompting quick engagement.

  1. Hulu


"Hulu email with the subject line '$1.99/month Hulu. Just For You: LIMITED TIME OFFER. ⏳,' highlighting a special subscription deal with an hourglass emoji to signal urgency."

Why It Works: The emoji strengthens the countdown message, creating a sense of immediacy. Combined with the compelling offer, it drives urgency and personalisation, enticing the reader to act now.

  1. Pampa 


"Pampa email with the subject line 'FLASH SALE | 20% off our Ponchos & Scarves 🔥,' promoting a flash sale with a fire emoji to amplify excitement."

Why It Works: The emoji conveys excitement and scarcity, complementing the flash sale announcement perfectly. It evokes urgency and FOMO, encouraging immediate clicks.

Excitement

Excitement-driven subject lines, enhanced with emojis, create enthusiasm and encourage readers to open the email.

  1. 4Knines


"4Knines email with the subject line '🎉 We've Got Big News!' showcasing an exciting announcement."

Why It Works: The emoji immediately conveys celebration and excitement, encouraging curiosity. It sets a positive and engaging tone for the announcement.

  1. Diaspora Co.


"Diaspora Co. email with the subject line 'Your fave chillies are back! 🔥,' announcing the return of popular products."

Why It Works: The emoji aligns with the spicy theme of chillies, making it visually and contextually relevant. It evokes enthusiasm and urgency, enticing readers to explore further.

  1. Dick’s Sporting Goods


 "Dick's Sporting Goods email with the subject line '🙌 Get Ready for Exclusive Offers, Big Deals & More...Delivered Right to Your Inbox!' emphasizing upcoming promotions."

Why It Works: The emoji grabs attention, creating a sense of anticipation. It pairs well with the message of exclusivity, drawing readers to open the email for details.

  1.  The Sill


 "The Sill email with the subject line 'It's our birthday—here's a gift for YOU! 🎁,' celebrating their anniversary with a customer gift."

Why It Works: The emoji instantly signals celebration and generosity, drawing attention to the subject line. The personalised "gift for YOU" phrase creates excitement and encourages the recipient to open the email, perfectly aligning with the celebratory tone.

  1. SimpleBits


"SimpleBits email with the subject line '✨ Grand Opening! Introducing Simple Type Co.' announcing the launch of a new product or brand."

Why It Works: The emoji adds an element of excitement and elegance, perfectly complementing the announcement of a new launch.

Seasonal Offers

Emojis tied to seasons or holidays like Black Friday, make subject lines more relevant and visually appealing during specific times of the year.

  1. Cheeky Bonsai


"Cheeky Bonsai email with the subject line 'A V-Day Treat For You ❤️,' offering a special Valentine's Day promotion with a heart emoji for a festive touch."

Why It Works: The heart emoji reinforces the Valentine’s Day theme, evoking warmth and affection. It connects emotionally with the audience while highlighting the subject’s relevancy. Seasonal emojis also enhance visibility in crowded inboxes.

  1. Krispy Kreme


"Krispy Kreme email with the subject line '🍁 Spice up Your Fall! Pumpkin Spice Is Back!,' announcing the seasonal return of pumpkin spice treats with a fall-themed maple leaf emoji."

Why It Works: The autumn leaf emoji complements the seasonal message, instantly tying the subject line to the fall theme. This creates relevance, and the playful tone builds anticipation for the product.

  1. Lifesum


"Lifesum email with the subject line '🎃 50% Off - Treat yourself to a health boo-st!,' offering a Halloween-themed discount with a pumpkin emoji for seasonal appeal."

Why It Works: The Halloween-themed pumpkin emoji adds festive charm while tying into the playful tone of “boo-st.” It’s seasonally relevant, eye-catching, and blends promotion with festivity.

  1. MacPaw


"MacPaw email with the subject line '🎄 Ho-ho-holiday sale is here! 🦌,' promoting a festive holiday sale with a Christmas tree and reindeer emoji."

Why It Works: The Christmas tree and reindeer emojis immediately set a holiday tone, creating excitement and urgency. The whimsical subject line effectively attracts attention in festive inbox clutter.

  1. Methodical Coffee


"Methodical Coffee email with the subject line '☕ The Return of Winter Bloom ❄️,' celebrating the return of a popular seasonal coffee blend with a snowflake emoji for winter vibes."

Why It Works: The coffee and snowflake emojis pair beautifully with the seasonal theme, subtly highlighting the product while evoking cosy, winter vibes. The imagery is both relevant and inviting.

Personalisation

Combining emojis with personalisation (like first names) creates a direct, friendly approach that resonates with readers.

  1. Absolut


"Absolut email with the subject line 'Smiles Davis, be the first to know about 4 NEW flavors 😁,' personalized with the recipient's name and featuring new product updates."

Why It Works: Personalising with the recipient's name and the emoji creates a friendly and inviting tone. It makes the email feel exclusive, boosting engagement.

  1. Booking.com


"Booking.com email with the subject line 'Need a flight for your trip, Smiles Davis? ✈️,' offering travel assistance tailored to the recipient."

Why It Works: The emoji reinforces the travel context, making the subject line more engaging and visually appealing. Combining it with personalisation shows relevance.

  1. Brilliant


"Brilliant email with the subject line 'Smiles Davis, here's your rundown for June 🧠,' delivering a personalized monthly update."

Why It Works: The emoji adds a seasonal vibe, aligning with a summer theme. The inclusion of the recipient's name further personalises the email.

  1. Busuu


"Busuu email with the subject line 'Smiles Davis, we've not seen you in a while 😢,' attempting to re-engage the recipient."

Why It Works: The emoji conveys concern, adding an emotional touch. It makes the email feel more genuine, encouraging lapsed users to re-engage.

  1. Kroger


"Kroger email with the subject line 'Smiles Davis, Your Yearly Checkout + Exclusive Deals Are Here 🎉,' combining personalized annual insights with exclusive offers."

Why It Works: The emoji reflects celebration and exclusivity. Pairing it with the recipient's name makes the message feel tailored and important.

Source (All Examples): Really Good Emails

Section 5: Tools to Test and Optimise Emojis in Subject Lines

Using emojis effectively in subject lines requires the right tools to ensure compatibility, performance, and deliverability. Here’s a curated list of essential resources to help you optimise your emoji usage, craft engaging subject lines, and avoid common pitfalls.

1. Emojipedia

Emojipedia is your go-to resource for exploring and copying emojis. The platform provides detailed information about each emoji, including its meaning and how it renders across different platforms like iOS, Android, and web clients.

  • Why It’s Useful: Ensures emoji relevance and compatibility with your brand message.

  • Key Feature: Preview how emojis look on various devices before using them in subject lines.

  • Link: Emojipedia

2. Klaviyo A/B Testing

Klaviyo’s A/B testing feature lets you test subject lines with and without emojis, making it easier to optimise performance. Dive deeper into Klaviyo’s predictive analytics to personalise your approach. By comparing open rates and CTRs, you can refine your approach for future campaigns.

  • Why It’s Useful: Provides data-driven insights to optimise subject line performance.

  • Key Feature: Easily test variables like emoji placement and tone within Klaviyo’s platform.

  • Link: Klaviyo

3. Litmus

Litmus enables you to preview how emails, including emojis, render across different email clients (e.g., Gmail, Outlook, Apple Mail) and devices. It ensures your subject lines look consistent and professional, regardless of where they’re viewed.

  • Why It’s Useful: Prevents display issues caused by emoji incompatibility on older or less common email clients.

  • Key Feature: Comprehensive testing for both desktop and mobile devices.

  • Link: Litmus

4. Google Postmaster Tools

This tool helps you monitor email deliverability and spam rates. By identifying potential triggers caused by excessive emoji use, you can ensure your emails land in your subscribers’ inboxes rather than spam folders.

  • Why It’s Useful: Provides actionable insights to maintain high deliverability rates.

  • Key Feature: Analyses sender reputation and spam triggers.

  • Link: Google Postmaster Tools

5. Subject Line Testers (CoSchedule/SubjectLine.com)

Platforms like CoSchedule and SubjectLine.com analyse your subject lines for length, tone, and effectiveness, offering actionable feedback on emoji usage and placement. These tools also suggest improvements in readability and engagement.

  • Why It’s Useful: Ensures your subject line balances emotional appeal with clarity and professionalism.

  • Key Feature: Real-time scoring and suggestions to maximise engagement.

  • Link: CoSchedule Headline Analyzer | SubjectLine.com

6. Mail Tester

Mail Tester evaluates your email’s deliverability by identifying issues like spam triggers, improper formatting, and overused emojis. By providing a detailed score, it helps you optimise both your subject lines and email content.

  • Why It’s Useful: Minimises the risk of being flagged as spam due to emoji misuse.

  • Key Feature: Comprehensive deliverability checks with specific recommendations.

  • Link: Mail Tester

Section 6: Common Risks and How to Avoid Them

While emojis can significantly boost engagement and open rates, improper use can lead to reduced effectiveness or even harm your email marketing efforts. Here’s a breakdown of common risks and actionable solutions to avoid them.

Spam Filters

  • Risk: Overusing emojis or placing them in irrelevant positions can trigger spam filters, reducing deliverability. Avoid common mistakes with these email marketing tips.

  • Solution: Limit emoji use to 1–2 per subject line. Test deliverability using tools like Mail Tester or Google Postmaster Tools to identify potential spam triggers.

Cultural Misinterpretation

  • Risk: Emojis can have different meanings depending on cultural and regional contexts, leading to unintended messages.

    • Example: The 👍 emoji may seem positive but could imply sarcasm in certain cultures.

  • Solution: Research emoji meanings for your target audience. Use platforms like Emojipedia to verify their cultural appropriateness and ensure they align with your campaign goals.

Mobile Display Issues

  • Risk: Some devices or outdated email clients (e.g., older versions of Outlook) may not support certain emojis, resulting in garbled text or empty boxes.

  • Solution: Stick to universally recognised emojis such as 📧 (email), 🎉 (celebration), or ⏰ (urgency). Preview emails across multiple devices using tools like Litmus to ensure proper rendering.

Potential Drawbacks of Emoji Use

While emojis can enhance subject lines, they also carry risks if misused:

  • Overuse: This can make emails look unprofessional or spammy.

  • Misinterpretation: This could confuse or alienate recipients if the emoji’s meaning is unclear.

  • Brand Mismatch: Emojis may dilute your brand's professionalism if they don’t align with its tone or theme.

Section 7: Long-Term Strategy for Emoji Use in Email Campaigns

Emojis are not just a short-term trend—they can be a valuable component of your email marketing strategy when used thoughtfully over time. To maximise their effectiveness, you need a long-term plan that includes testing, analysis, and seasonal relevance.

Create a Testing Framework

  • Experiment with subject lines using emojis in combination with other elements like tone, length, and keyword placement. Rather than focusing solely on the presence of emojis, test how they complement the message. 

  • Example: Test the emoji placement—at the beginning, middle, or end of the subject line—and adjust based on the results.

Analyse Metrics Across Campaigns

  • Dive into metrics like open rates, CTR, and conversions for various campaigns to identify trends in emoji performance.

  • Segment your audience: Compare how different demographics (e.g., younger vs older audiences) respond to emoji use.

Plan for Seasonality

  • Incorporate emojis into seasonal campaigns to align with audience expectations and maximise engagement. Knowing the best times to send newsletters can amplify your efforts.

    • Example: Use 🎃 for Halloween, 🎄 for Christmas, and 🌸 for spring promotions.

  • Schedule emoji-based campaigns around major events, product launches, or promotional periods.

Consistency and Audience Alignment

  • Develop emoji guidelines to ensure consistency across campaigns while maintaining alignment with your brand voice.

  • Tailor emojis to audience preferences by reviewing past campaign performance and testing new ideas.

  • Avoid overuse by setting limits on emoji frequency within your email strategy.

Iterate and Evolve

  • Reassess your emoji strategy periodically to adapt to audience behaviour, technological changes, and market trends.

Conclusion

Emojis in subject lines have proven to be more than just a trend—they're a valuable tool for grabbing attention, creating emotional connections, and driving higher engagement. When used thoughtfully, emojis can transform your email marketing efforts, making your campaigns more relatable, visually appealing, and impactful. 

However, success lies in the balance—overuse or misalignment with your brand can backfire. By following best practices, leveraging the right tools, and analysing audience behaviour, you can harness the full potential of emojis to create email subject lines that stand out in today’s crowded inboxes.

Key Takeaways:

  • Emojis = Instant Attention: Stand out in crowded inboxes with eye-catching visuals.

  • Tailored for Your Tribe: Younger audiences crave them, while older readers value a classy touch.

  • Industry Heroes: Retail and travel campaigns thrive with emojis—perfect for flash sales or wanderlust vibes.

  • Less is More: A sprinkle of 1–2 emojis can boost engagement without hitting the spam folder.

  • Supercharge with Tools: Leverage Klaviyo, Litmus, and Mail Tester to ensure perfect performance.

  • Seasonal Spark: Match emojis to holidays and trends for campaigns that feel timely and exciting.

Tired of Low Open Rates? 

Discover How Emojis Can Help! Click here to learn how to use emojis strategically, backed by data and real-world examples, to boost engagement and connect with your audience like never before!




Unlock the power of emojis in email subject lines! This guide shows you how to boost open rates, engage your audience, and craft campaigns that stand out—all backed by actionable insights and real-world examples.

In today’s overflowing inboxes, grabbing attention isn’t just a challenge—it’s a necessity. That’s where emojis come into play. These tiny visuals have become a powerful tool for brands to stand out and connect with their audience. 

But do they really boost engagement, or are they just a passing trend? In this guide, we’ll explore the psychology behind emojis, examine real-world data, and share best practices for using them effectively. By the end, you’ll know how to leverage emojis to craft subject lines that not only catch the eye but also drive higher open rates—all backed by actionable insights and research.

Section 1: The Psychology Behind Emojis in Subject Lines

Emojis are more than just playful visuals—they’re a psychological tool that can transform how subject lines are perceived. If you’re looking for ways to refine your email strategy, check out these segmentation tips to better connect with your audience. Emojis create an immediate connection with readers by combining visual appeal with emotional triggers, helping your email stand out in crowded inboxes. Here’s why they work so effectively:

Why Emojis Work:

  • Visual Triggers: Research shows that the brain processes images 60,000 times faster than text. Emojis are visual cues that grab attention instantly, especially when competing against plain-text subject lines.

  • Emotional Resonance: Emojis have the unique ability to convey tone, excitement, and urgency without adding length to your subject line. For example, a simple “🎉” adds a celebratory feel, while “⏰” emphasises urgency.

  • Universal Appeal: Emojis transcend language barriers, making them a versatile tool for connecting with global audiences. They help readers intuitively understand the tone or intent behind your email.

Reader Behaviour:

Emojis can significantly influence how readers interact with your emails.

  • Improved Scanning: Adobe's study found that subject lines with emojis increase engagement because they draw attention faster than plain text.

  • Higher Open Rates: Emails with emojis in their subject lines can see a significant boost in open rates, depending on the industry and the type of emoji used. For more proven methods, explore these strategies to improve open rates.

  • Examples in Action:

    • “⏰ Last Chance: 20% Off Ends Tonight!” - Creates urgency and compels action.

    • “🎉 Your Gift Is Waiting Inside!” - Adds a sense of excitement and curiosity.

    • “🌟 New Arrivals You Can’t Miss!” - Highlights exclusivity and appeal.

Section 2: Do Emojis in Subject Lines Boost Open Rates? (Data-Driven Insights)

Emojis are more than playful symbols—they are strategic tools that can significantly enhance email engagement. Here’s a breakdown of their effectiveness, supported by reliable data sources.

Emojis Increase Open Rates

Emojis in email subject lines can significantly enhance open rates. Experian reports that 56% of brands using emojis in their email subject lines experienced higher open rates. Elite Digital Agency

Additionally, Swiftpage (now Act!) found that incorporating emojis led to a 29% increase in unique open rates and a 28% rise in unique click-through rates. VibeTrace

Performance Varies by Industry

  • Retail & E-commerce: Emojis like 🎉 and 🔥 convey excitement and urgency, aligning perfectly with flash sales or limited-time offers.

  • Travel & Hospitality: Icons like ✈️ and 🌍 evoke wanderlust and create a connection with aspirational messaging, ideal for trip promotions.

  • B2B Campaigns: Subtle emojis like 📈 add a touch of relatability to subject lines while maintaining professionalism.

Impact Based on Demographics

  • Younger Audiences (18–34): Emojis align with their communication style, with 86% of users aged 24 or younger frequently using emojis, indicating a potential for higher engagement.  Content Detector

  • Older Audiences (35+): Approximately 15% of individuals aged 45 and above perceive emoji usage as inappropriate, suggesting that minimal and purposeful use is advisable for this demographic.  Sixth City Marketing

Emojis and Mobile Devices

A large portion of emails are opened on mobile devices, where emojis naturally stand out and enhance visual appeal. Testing across devices ensures emojis render correctly, as platforms like Outlook may display inconsistently.

Section 3: Best Practices for Using Emojis in Subject Lines

Using emojis in subject lines can significantly enhance open rates and engagement, but to maximise their effectiveness, it's essential to follow best practices. Here are key strategies to ensure your emojis hit the mark:

1. Use Emojis to Complement, Not Replace Words

Emojis should enhance your subject line, not overshadow or confuse the message. They are most effective when they add context or visual interest without compromising clarity.

  • Good Example: “🎁 Surprise Inside: Exclusive Offer Just for You!”

  • Bad Example: “🎁🎁🎁 Exclusive!” (Overuse can make the message appear spammy or unclear.)

2. Test for Compatibility Across Devices

Emojis render differently depending on the email client and device, with older platforms like Outlook sometimes displaying them inconsistently. To ensure your emojis appear as intended, preview your emails across Gmail, Outlook, and popular mobile clients. Tools like Klaviyo’s email preview feature or Litmus can help.

3. Keep It Relevant to the Content

The emojis you use should align with the theme and tone of your email content. Irrelevant emojis can confuse readers and detract from your message.

  • Good Example: A travel email could use ✈️ or 🌍 to evoke wanderlust.

  • Good Example: A flash sale email benefits from urgency-focused emojis like ⏰.

4. Don’t Overuse Emojis

While emojis grab attention, excessive use can make your subject line appear unprofessional or spammy. Stick to a maximum of 1–2 emojis to maintain a balance between visual appeal and readability.

5. A/B Test for Performance

Testing is essential to identify what resonates with your audience. A/B test subject lines with and without emojis to determine which performs better in terms of open rates and how to improve click-through rates. Learn more about A/B testing for email conversions to refine your campaigns.

  • Example Test:

    • Version A: “🎉 Your Weekend Just Got Better – 20% Off”

    • Version B: “Your Weekend Just Got Better – 20% Off”
      Analyse the results to optimise future campaigns.

Section 4: Subject Line Examples with Emojis (By Campaign Goals)

Urgency

Using emojis to convey urgency encourages readers to act quickly, creating a sense of scarcity or time sensitivity. Pair this approach with these email deliverability best practices to maximise inbox placement.

  1. Arrived


"Arrived email with the subject line '📣 Last hours to invest for the next expected dividends! 📣,' creating urgency for investment opportunities with megaphone emojis."

Why It Works: The emoji acts as an alert, reinforcing the urgency conveyed in the subject line. It grabs attention and pushes readers to act quickly, aligning with the time-sensitive message.

  1. Fly By Jing


"Fly By Jing email with the subject line '🚨 5 days left to get the good stuff by 12/24,' emphasizing the deadline for Christmas delivery with an alert emoji."

Why It Works: The emoji emphasises urgency, ensuring the deadline is front and centre. It encourages readers to take immediate action, making it highly effective for time-sensitive promotions.

  1. Hero Cosmetics


"Hero Cosmetics email with the subject line '⏰ <24 hours left. 20% off. The time is now.,' urging customers to take advantage of a limited-time discount with a clock emoji."

Why It Works: The emoji highlights the exclusivity and time sensitivity of the deal. It pairs effectively with the direct discount offer, prompting quick engagement.

  1. Hulu


"Hulu email with the subject line '$1.99/month Hulu. Just For You: LIMITED TIME OFFER. ⏳,' highlighting a special subscription deal with an hourglass emoji to signal urgency."

Why It Works: The emoji strengthens the countdown message, creating a sense of immediacy. Combined with the compelling offer, it drives urgency and personalisation, enticing the reader to act now.

  1. Pampa 


"Pampa email with the subject line 'FLASH SALE | 20% off our Ponchos & Scarves 🔥,' promoting a flash sale with a fire emoji to amplify excitement."

Why It Works: The emoji conveys excitement and scarcity, complementing the flash sale announcement perfectly. It evokes urgency and FOMO, encouraging immediate clicks.

Excitement

Excitement-driven subject lines, enhanced with emojis, create enthusiasm and encourage readers to open the email.

  1. 4Knines


"4Knines email with the subject line '🎉 We've Got Big News!' showcasing an exciting announcement."

Why It Works: The emoji immediately conveys celebration and excitement, encouraging curiosity. It sets a positive and engaging tone for the announcement.

  1. Diaspora Co.


"Diaspora Co. email with the subject line 'Your fave chillies are back! 🔥,' announcing the return of popular products."

Why It Works: The emoji aligns with the spicy theme of chillies, making it visually and contextually relevant. It evokes enthusiasm and urgency, enticing readers to explore further.

  1. Dick’s Sporting Goods


 "Dick's Sporting Goods email with the subject line '🙌 Get Ready for Exclusive Offers, Big Deals & More...Delivered Right to Your Inbox!' emphasizing upcoming promotions."

Why It Works: The emoji grabs attention, creating a sense of anticipation. It pairs well with the message of exclusivity, drawing readers to open the email for details.

  1.  The Sill


 "The Sill email with the subject line 'It's our birthday—here's a gift for YOU! 🎁,' celebrating their anniversary with a customer gift."

Why It Works: The emoji instantly signals celebration and generosity, drawing attention to the subject line. The personalised "gift for YOU" phrase creates excitement and encourages the recipient to open the email, perfectly aligning with the celebratory tone.

  1. SimpleBits


"SimpleBits email with the subject line '✨ Grand Opening! Introducing Simple Type Co.' announcing the launch of a new product or brand."

Why It Works: The emoji adds an element of excitement and elegance, perfectly complementing the announcement of a new launch.

Seasonal Offers

Emojis tied to seasons or holidays like Black Friday, make subject lines more relevant and visually appealing during specific times of the year.

  1. Cheeky Bonsai


"Cheeky Bonsai email with the subject line 'A V-Day Treat For You ❤️,' offering a special Valentine's Day promotion with a heart emoji for a festive touch."

Why It Works: The heart emoji reinforces the Valentine’s Day theme, evoking warmth and affection. It connects emotionally with the audience while highlighting the subject’s relevancy. Seasonal emojis also enhance visibility in crowded inboxes.

  1. Krispy Kreme


"Krispy Kreme email with the subject line '🍁 Spice up Your Fall! Pumpkin Spice Is Back!,' announcing the seasonal return of pumpkin spice treats with a fall-themed maple leaf emoji."

Why It Works: The autumn leaf emoji complements the seasonal message, instantly tying the subject line to the fall theme. This creates relevance, and the playful tone builds anticipation for the product.

  1. Lifesum


"Lifesum email with the subject line '🎃 50% Off - Treat yourself to a health boo-st!,' offering a Halloween-themed discount with a pumpkin emoji for seasonal appeal."

Why It Works: The Halloween-themed pumpkin emoji adds festive charm while tying into the playful tone of “boo-st.” It’s seasonally relevant, eye-catching, and blends promotion with festivity.

  1. MacPaw


"MacPaw email with the subject line '🎄 Ho-ho-holiday sale is here! 🦌,' promoting a festive holiday sale with a Christmas tree and reindeer emoji."

Why It Works: The Christmas tree and reindeer emojis immediately set a holiday tone, creating excitement and urgency. The whimsical subject line effectively attracts attention in festive inbox clutter.

  1. Methodical Coffee


"Methodical Coffee email with the subject line '☕ The Return of Winter Bloom ❄️,' celebrating the return of a popular seasonal coffee blend with a snowflake emoji for winter vibes."

Why It Works: The coffee and snowflake emojis pair beautifully with the seasonal theme, subtly highlighting the product while evoking cosy, winter vibes. The imagery is both relevant and inviting.

Personalisation

Combining emojis with personalisation (like first names) creates a direct, friendly approach that resonates with readers.

  1. Absolut


"Absolut email with the subject line 'Smiles Davis, be the first to know about 4 NEW flavors 😁,' personalized with the recipient's name and featuring new product updates."

Why It Works: Personalising with the recipient's name and the emoji creates a friendly and inviting tone. It makes the email feel exclusive, boosting engagement.

  1. Booking.com


"Booking.com email with the subject line 'Need a flight for your trip, Smiles Davis? ✈️,' offering travel assistance tailored to the recipient."

Why It Works: The emoji reinforces the travel context, making the subject line more engaging and visually appealing. Combining it with personalisation shows relevance.

  1. Brilliant


"Brilliant email with the subject line 'Smiles Davis, here's your rundown for June 🧠,' delivering a personalized monthly update."

Why It Works: The emoji adds a seasonal vibe, aligning with a summer theme. The inclusion of the recipient's name further personalises the email.

  1. Busuu


"Busuu email with the subject line 'Smiles Davis, we've not seen you in a while 😢,' attempting to re-engage the recipient."

Why It Works: The emoji conveys concern, adding an emotional touch. It makes the email feel more genuine, encouraging lapsed users to re-engage.

  1. Kroger


"Kroger email with the subject line 'Smiles Davis, Your Yearly Checkout + Exclusive Deals Are Here 🎉,' combining personalized annual insights with exclusive offers."

Why It Works: The emoji reflects celebration and exclusivity. Pairing it with the recipient's name makes the message feel tailored and important.

Source (All Examples): Really Good Emails

Section 5: Tools to Test and Optimise Emojis in Subject Lines

Using emojis effectively in subject lines requires the right tools to ensure compatibility, performance, and deliverability. Here’s a curated list of essential resources to help you optimise your emoji usage, craft engaging subject lines, and avoid common pitfalls.

1. Emojipedia

Emojipedia is your go-to resource for exploring and copying emojis. The platform provides detailed information about each emoji, including its meaning and how it renders across different platforms like iOS, Android, and web clients.

  • Why It’s Useful: Ensures emoji relevance and compatibility with your brand message.

  • Key Feature: Preview how emojis look on various devices before using them in subject lines.

  • Link: Emojipedia

2. Klaviyo A/B Testing

Klaviyo’s A/B testing feature lets you test subject lines with and without emojis, making it easier to optimise performance. Dive deeper into Klaviyo’s predictive analytics to personalise your approach. By comparing open rates and CTRs, you can refine your approach for future campaigns.

  • Why It’s Useful: Provides data-driven insights to optimise subject line performance.

  • Key Feature: Easily test variables like emoji placement and tone within Klaviyo’s platform.

  • Link: Klaviyo

3. Litmus

Litmus enables you to preview how emails, including emojis, render across different email clients (e.g., Gmail, Outlook, Apple Mail) and devices. It ensures your subject lines look consistent and professional, regardless of where they’re viewed.

  • Why It’s Useful: Prevents display issues caused by emoji incompatibility on older or less common email clients.

  • Key Feature: Comprehensive testing for both desktop and mobile devices.

  • Link: Litmus

4. Google Postmaster Tools

This tool helps you monitor email deliverability and spam rates. By identifying potential triggers caused by excessive emoji use, you can ensure your emails land in your subscribers’ inboxes rather than spam folders.

  • Why It’s Useful: Provides actionable insights to maintain high deliverability rates.

  • Key Feature: Analyses sender reputation and spam triggers.

  • Link: Google Postmaster Tools

5. Subject Line Testers (CoSchedule/SubjectLine.com)

Platforms like CoSchedule and SubjectLine.com analyse your subject lines for length, tone, and effectiveness, offering actionable feedback on emoji usage and placement. These tools also suggest improvements in readability and engagement.

  • Why It’s Useful: Ensures your subject line balances emotional appeal with clarity and professionalism.

  • Key Feature: Real-time scoring and suggestions to maximise engagement.

  • Link: CoSchedule Headline Analyzer | SubjectLine.com

6. Mail Tester

Mail Tester evaluates your email’s deliverability by identifying issues like spam triggers, improper formatting, and overused emojis. By providing a detailed score, it helps you optimise both your subject lines and email content.

  • Why It’s Useful: Minimises the risk of being flagged as spam due to emoji misuse.

  • Key Feature: Comprehensive deliverability checks with specific recommendations.

  • Link: Mail Tester

Section 6: Common Risks and How to Avoid Them

While emojis can significantly boost engagement and open rates, improper use can lead to reduced effectiveness or even harm your email marketing efforts. Here’s a breakdown of common risks and actionable solutions to avoid them.

Spam Filters

  • Risk: Overusing emojis or placing them in irrelevant positions can trigger spam filters, reducing deliverability. Avoid common mistakes with these email marketing tips.

  • Solution: Limit emoji use to 1–2 per subject line. Test deliverability using tools like Mail Tester or Google Postmaster Tools to identify potential spam triggers.

Cultural Misinterpretation

  • Risk: Emojis can have different meanings depending on cultural and regional contexts, leading to unintended messages.

    • Example: The 👍 emoji may seem positive but could imply sarcasm in certain cultures.

  • Solution: Research emoji meanings for your target audience. Use platforms like Emojipedia to verify their cultural appropriateness and ensure they align with your campaign goals.

Mobile Display Issues

  • Risk: Some devices or outdated email clients (e.g., older versions of Outlook) may not support certain emojis, resulting in garbled text or empty boxes.

  • Solution: Stick to universally recognised emojis such as 📧 (email), 🎉 (celebration), or ⏰ (urgency). Preview emails across multiple devices using tools like Litmus to ensure proper rendering.

Potential Drawbacks of Emoji Use

While emojis can enhance subject lines, they also carry risks if misused:

  • Overuse: This can make emails look unprofessional or spammy.

  • Misinterpretation: This could confuse or alienate recipients if the emoji’s meaning is unclear.

  • Brand Mismatch: Emojis may dilute your brand's professionalism if they don’t align with its tone or theme.

Section 7: Long-Term Strategy for Emoji Use in Email Campaigns

Emojis are not just a short-term trend—they can be a valuable component of your email marketing strategy when used thoughtfully over time. To maximise their effectiveness, you need a long-term plan that includes testing, analysis, and seasonal relevance.

Create a Testing Framework

  • Experiment with subject lines using emojis in combination with other elements like tone, length, and keyword placement. Rather than focusing solely on the presence of emojis, test how they complement the message. 

  • Example: Test the emoji placement—at the beginning, middle, or end of the subject line—and adjust based on the results.

Analyse Metrics Across Campaigns

  • Dive into metrics like open rates, CTR, and conversions for various campaigns to identify trends in emoji performance.

  • Segment your audience: Compare how different demographics (e.g., younger vs older audiences) respond to emoji use.

Plan for Seasonality

  • Incorporate emojis into seasonal campaigns to align with audience expectations and maximise engagement. Knowing the best times to send newsletters can amplify your efforts.

    • Example: Use 🎃 for Halloween, 🎄 for Christmas, and 🌸 for spring promotions.

  • Schedule emoji-based campaigns around major events, product launches, or promotional periods.

Consistency and Audience Alignment

  • Develop emoji guidelines to ensure consistency across campaigns while maintaining alignment with your brand voice.

  • Tailor emojis to audience preferences by reviewing past campaign performance and testing new ideas.

  • Avoid overuse by setting limits on emoji frequency within your email strategy.

Iterate and Evolve

  • Reassess your emoji strategy periodically to adapt to audience behaviour, technological changes, and market trends.

Conclusion

Emojis in subject lines have proven to be more than just a trend—they're a valuable tool for grabbing attention, creating emotional connections, and driving higher engagement. When used thoughtfully, emojis can transform your email marketing efforts, making your campaigns more relatable, visually appealing, and impactful. 

However, success lies in the balance—overuse or misalignment with your brand can backfire. By following best practices, leveraging the right tools, and analysing audience behaviour, you can harness the full potential of emojis to create email subject lines that stand out in today’s crowded inboxes.

Key Takeaways:

  • Emojis = Instant Attention: Stand out in crowded inboxes with eye-catching visuals.

  • Tailored for Your Tribe: Younger audiences crave them, while older readers value a classy touch.

  • Industry Heroes: Retail and travel campaigns thrive with emojis—perfect for flash sales or wanderlust vibes.

  • Less is More: A sprinkle of 1–2 emojis can boost engagement without hitting the spam folder.

  • Supercharge with Tools: Leverage Klaviyo, Litmus, and Mail Tester to ensure perfect performance.

  • Seasonal Spark: Match emojis to holidays and trends for campaigns that feel timely and exciting.

Tired of Low Open Rates? 

Discover How Emojis Can Help! Click here to learn how to use emojis strategically, backed by data and real-world examples, to boost engagement and connect with your audience like never before!




Join our newsletter list

Sign up to get the most recent blog articles in your email every week.

Share this post to the social medias