Email Subject Line Generator
Your subject line decides whether the email gets opened. Enter your topic and this free tool gives you a dozen subject lines built from proven formulas — curiosity, benefit, urgency, question, number and personal. Tap any to copy, then score your favourite with the subject line tester. No signup.
Keep subject lines under ~50 characters so they don't get cut off on mobile, lead with the most interesting word, and avoid spammy ALL CAPS and excessive punctuation. Tap a line to copy.
What makes subject lines get opened
The best subject lines spark curiosity or a clear benefit, feel personal, and are short enough to show in full on a phone. Test variations on real sends and keep what works. Once you've picked one, score it for length, spam triggers and curiosity with the email subject line tester, and write the email body faster with help from how to write a welcome email sequence. New to email? Read email marketing for beginners.
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