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Best performing subject lines at your fingertips

Zenie AI continuously learns from hundreds of thousands of email subject lines with over 60% open rates to help you build the best performing subject lines.

What is your email about?
Type in 5 keywords and a quick summary (30-50 characters) about the email you want to send.
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How to use the AI subject line generator

Struggling to find the perfect email subject line? It’s a tricky balance—you want it to be engaging and attention-grabbing while staying true to your email’s content.


Our AI-powered subject line generator makes this effortless. Just provide a few keywords or a short description, and let our AI craft compelling, high-performing subject lines for you.


No more guesswork—just AI-driven inspiration to boost your open rates. Try it now and watch your emails get the attention they deserve!

Thanks! Here are some options for you

Here's a set of freshly generated subject lines that our AI has crafted for you. Use them to make your emails stand out in any inbox.

Don't miss out our BOGO sale!
92%
copied
Black Sale. New arrivals 30% off!
92%
copied
💥 25% Black Friday Code: FRIDAY
92%
copied
Black Friday is back!🔥 Shop now!
92%
copied
🚨 BLACK SALE! Bestsellers 45% off!
92%
copied
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Found a promising subject line? Use our free subject line tester to check for spam triggers, optimal word count, personalization effectiveness and overall health score.

Discover More from   Zenie AI

If you liked Zenie’s subject lines, explore what else Zenie AI can do for your email marketing.

Build & take campaigns live 
in minutes

Build complex email sequences in under 2 minutes with Zenie.

Craft subject lines that get opened

Turn your emails from ignored to adored with our AI-powered subject line generator!

Guarantee conversions with help from Zenie AI

Zenie AI suggests the best versions of content by learning from hundreds of thousands of high-converting emails

Frequently Asked Questions

How does the AI subject line generator create email subject lines?

Our email subject line generator uses advanced AI trained on hundreds of thousands of high-performing subject lines with 60%+ open rates. Simply enter 5 keywords and a brief summary (30-50 characters) about your email, and Zenie AI instantly generates multiple subject line options tailored to your content and audience.

Can the AI subject line generator work for different types of emails?

Absolutely! Our subject line generator creates strong headlines for all email types, including promotional campaigns, newsletters, welcome sequences, abandoned cart emails, seasonal offers, and transactional messages. The AI adapts its suggestions based on your keywords and email purpose to match your campaign goals.

How many subject lines does the AI generator provide?

The AI subject line generator offers multiple variations for each request, providing you with a range of options to choose from. Each generated subject line is optimized for various aspects, including urgency, personalization, curiosity, and conversion potential, based on proven email marketing data.

Is the AI email subject line generator free to use?

Yes, our AI subject line generator is completely free with no credit card required. You can generate an unlimited number of subject lines for your email campaigns. For advanced email marketing features, such as automated sequences and detailed analytics, you can try our platform, ZEPIC, for free for 14 days.

What makes this email subject line generator better than writing them manually?

Of course, you can write subject lines manually—feel free to be creative! Nothing beats the human mind when it comes to understanding your brand voice and audience. However, if you need some inspiration or a helpful nudge in the right direction, our AI generator can provide data-backed suggestions based on what has worked for millions of successful campaigns. Think of it as your creative writing partner.

Try ZEPIC's Email Marketing Platform for free for 14 days

Try Free for 14 Days
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