📬 Email Subject Line Tester
Test your subject lines before you hit send
About This Tool
Analyse your email subject line for length, spam trigger words, emoji usage, personalisation, and emotional appeal. Get an overall score out of 100 and specific improvement suggestions to maximise your open rate.
How It Works
- 1
Enter Your Subject Line
Type or paste your email subject line into the tool. Include the preview text (pre-header) if you have one for a more complete analysis.
- 2
Select Your Audience
Choose B2B or B2C audience type and your industry to apply relevant benchmarks and spam word filters.
- 3
Review Your Score
See your subject line score, flags for spam trigger words, character count, and personalisation tips — with rewritten alternatives.
Tool Details
Related Topics
Use the Tool
📬 Email Subject Line Tester
Free · No sign-up required · Runs in your browser
Email Subject Line Tester
Get a score, spam flags, and improvement suggestions before you hit send.
Email Subject Line Tester FAQ
Common Questions About Email Subject Line Tester
The most effective subject lines are: short (35–50 characters for full mobile display), personalised (using the recipient's first name increases open rates by 26%), create curiosity or urgency without being clickbait, clearly indicate the email's value, and avoid spam trigger words.
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