✉️ Free AI tool · no sign-up
Free Email Subject Line Generator
Tell the AI what the email is about and who receives it. You get short subject lines with different angles to test against each other.
How to use the email subject line generator
- Summarize the email in one or two sentences, including any offer or deadline.
- Choose the email type, tone and audience.
- Generate a batch of subject lines and shortlist two or three.
- A/B test them with your email platform and keep the winner.
Frequently asked questions
How long should an email subject line be? +
Short subject lines are safer on mobile, where long ones get cut off. The generator aims for about 30–50 characters.
Will these subject lines trigger spam filters? +
The AI avoids typical spam patterns like ALL CAPS and excessive punctuation. Deliverability also depends on your sender reputation and content.
Can I use them for cold outreach? +
Yes. Choose “Cold outreach” as the email type to get plain, personal subject lines instead of promotional ones.
Should I use emojis in subject lines? +
Sometimes. The generator uses them rarely. Test with and without to see what your audience prefers.