Free newsletter subject line generator
Write newsletter subject lines and preview text that get opened. See how each one cuts off on a phone before you send. Free AI generator for small businesses.
- Free, no account needed
- Phone and desktop inbox
- Export CSV for A/B tests
For newsletters: what’s different
A monthly newsletter competes with every other email that arrived that morning. The subject line and the preview text underneath it are all most people read before deciding to open or not.
Newsletters have their own problem: the same sender every month, so “October newsletter” teaches people to skip it. Lead with the most useful thing inside this issue instead, and let the preview text add the second reason to open.
What works
- Lead with the best item inside, not the issue name or month.
- Keep the important words in the first 35 to 40 characters. Phones cut off the rest.
- Use the preview text for a second hook. Don’t repeat the subject.
- Write like you talk to a customer. Clever wordplay often reads as vague.
- Avoid all caps and piles of exclamation marks. They look like spam and can trip filters.
How to use it
- 1.Paste the email you’re about to send.
- 2.Get three subject and preview pairs.
- 3.Pick one, check where it cuts off and copy it.
Questions
What is preview text?
The grey line shown after the subject in most inboxes. If you don’t set it, email apps show the first words of your email, which is often “View in browser”.
How long should a newsletter subject line be?
Aim for under about 40 characters so it isn’t cut off on phones. The tool shows where it cuts.
Should I put emoji in subject lines?
One can help an email stand out in a busy inbox. Test it with your own list before making it a habit.

