Email subject line generator
The line that decides whether your email gets opened or buried.
What this tool does
The subject line is 40% of the email's job. The rest of the email is the other 60%, but it doesn't get a chance to do its job unless the subject line earns the open. Most subject lines fail because they try too hard — they shout, they over-promise, they sound like every other marketing email the reader has already trained themselves to ignore.
How to use it
- Enter the email's purpose in one sentence.
- Enter who it's going to — colleague, prospect, customer, friend.
- Pick a tone — direct, curious, warm, urgent (use urgent sparingly).
- Generate. Pick one. Rewrite it slightly so it doesn't sound generated.
Why it matters
Open rates double when subject lines stop sounding like marketing. Direct, specific, lowercase-where-possible, no urgency theatre. The line that performs best is usually the one that sounds like it came from a person who knows the reader, because the inbox is full of lines that don't.
Questions people actually ask.
What about emojis?
Use sparingly, never in B2B, and never as a substitute for a good subject line. One well-placed emoji can lift open rates; three look like spam.
How long should the subject be?
30-50 characters. Long subjects get cut off on mobile, which is where most email is read. Front-load the most important word.
Should I personalise with their first name?
Sometimes. Useful when the rest of the email is also personal. Annoying when the email is obviously a mass send and the only personal touch is the first name. Don't fake intimacy.