Email Subject Line Scorer — free online
You write an email, you spend ages on the message, and then you stare at the subject line with no idea if it's any good. Too long? Too pushy? Will it land in spam? It's hard to tell on your own. We added a free tool that checks it for you — Email Subject Scorer — right in your browser.
What it does
You paste your subject line and get an instant score from 0 to 100. It looks at the length, common spam signals, words that sound too urgent, your use of emojis, and the formatting. Along with the score you get plain, concrete tips on what to change to make the line stronger.
Nothing leaves your device
The whole thing runs in your browser. Your subject line is never uploaded, never saved, and never sent anywhere. You can close the tab and there's no trace left.
How to use it
- Open Email Subject Scorer and paste your subject line into the box.
- Read your 0–100 score and the notes on length, spam words, urgency, and emojis.
- Apply the tips, tweak the line, and use the version that scores best.
It's free with no limit. There are more small tools on the Apps page.