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Free AI Email
Subject Line Generator

Five subject lines, every angle covered — urgency, curiosity, benefit, social proof, and contrarian. Tell us what the email is about and we'll generate openable lines under 60 characters.

3 free generations per day · No credit card · Sign up for 5 per day

Frequently asked

What makes a good email subject line?

Specific, short, and emotionally charged. Our prompts mix curiosity, urgency, and benefit so you can A/B test the strongest angle.

Can I use these for cold outreach?

Yes — they work for marketing, newsletter, and sales emails. Just give context about your offer and audience.

Will my subject line land in spam?

Spam filters care about sender reputation and content quality, not the subject line alone. These outputs avoid the obvious spam triggers.