About the Email Subject Line Generator
Email Subject Line Generator suggests twelve subject lines for your email. Describe what the email is about, choose a goal such as getting opens, announcing a promotion, introducing a newsletter or following up, and get a list to copy one by one. Each line aims for under 60 characters, so it does not get cut off on a phone, and the page shows a counter for every line. The lines are written to be specific and honest: no all capitals, no false urgency and no spam trigger words. Your text is sent to our AI service and is not stored.
Updated October 2026
How to use the Email Subject Line Generator
- 1Describe your email in a sentence or two, including the main benefit or news.
- 2Choose the goal: opens, promotion, newsletter or follow-up.
- 3Press Write subject lines.
- 4Check the character counter and pick two or three to test.
- 5Copy the lines you like and paste them into your email tool.
What a subject line has to do
A subject line has one job: get the right person to open the email. It competes with dozens of others, shows for only a few words on a phone, and is often read together with the sender name. Clear and specific usually beats clever.
Pick the goal
For opens, lead with the benefit to the reader. For promotions, state the offer plainly, with the real discount or date. For newsletters, name the main story in the issue. For follow-ups, refer to the earlier message so the reader knows what it is about.
- Opens: benefit first
- Promotion: real offer, real dates
- Newsletter: name the headline story
- Follow-up: refer to the first email
Test, do not guess
Send two subject lines to equal samples of your list, wait for opens and clicks, then send the better one to the rest. Over time you learn what your readers respond to. Keep notes: a pattern such as numbers helping or questions hurting is worth knowing.
Related tools
Write the message itself with the AI Email Writer, and shorten or sharpen your lines with the Character Counter. If you send a newsletter, the Headline Generator suggests titles for the main story, and the Social Media Character Counter checks lengths for other places the text will appear.
Stay trustworthy
Never use a misleading Re: or Fwd:, never claim urgency that is not real, and always make the content match the subject. Trust is slow to build and quick to lose, and it decides whether people keep opening your emails.
Features
- Twelve subject lines per request
- Aimed at under 60 characters, with a counter on each
- Goals: opens, promotion, newsletter, follow-up
- Specific and honest wording
- No all capitals or spam trigger words
- Copy one or all
Frequently asked questions
How long should a subject line be?
Under about 60 characters, so it is not cut off on most phones. Put the most important words first.
Does the subject line affect whether my email lands in spam?
It can. All capitals, repeated exclamation marks and promises of free money are common signals. Spam filters also look at your sending reputation, authentication and content, so a clean subject line helps but is not a guarantee.
Should I use emoji?
Sometimes, one at most, if it fits your audience. Test it. Plain words often work as well, and an emoji that does not render looks broken.
How do I choose between twelve lines?
Pick two or three and run an A/B test on a part of your list. Compare opens and clicks, not just opens, and keep the winner for the rest.
Can I use these for cold emails?
Yes, but keep them plain and relevant. For a full outreach email with a follow-up, use the Cold Email Writer.
Why not make the subject line mysterious?
Curiosity can work once, but if the email does not deliver what the subject suggests, readers feel misled and unsubscribe. The tool is told not to promise anything the email does not contain.
Does it write the email body?
No, only subject lines. The AI Email Writer drafts the message itself.
Is my text stored?
No. It is sent to our AI service to write the lines and is not stored.