Subject line tester
Score a subject line for length, spam triggers and honesty.
0
out of 100
- Type a subject line to score it.
How to use it
Type a subject line and the score updates as you go. It checks length (mobile inboxes cut off around 40 to 50 characters), capitals, exclamation marks, common spam trigger words, and a fake "Re:" or "Fwd:" on a first email. Try two or three versions and keep the one with the clearest promise.
Why it matters
Agents get a lot of email from vendors. A short, specific, honest subject line is what gets opened, and it is also what keeps you on the right side of CAN-SPAM, which bans deceptive subject lines. Spam-like wording hurts your sending reputation for every email after it.