Email Subject Line Tester

Analyze your email subject lines for length, spam triggers, and engagement.

0 / 60 characters recommended
85
Subject Line Score
✓ Length
Optimal (45 chars)
✓ Spam Score
Clean - No spam words
✓ Emoji Usage
Appropriate
! Capitalization
Some caps detected
Gmail Preview
Your subject line preview

Tips to Improve

  • Keep subject lines under 50 characters for mobile
  • Avoid excessive punctuation (!!!)
  • Use personalization when possible
  • Create urgency without being pushy

Why Subject Lines Matter

47% of email recipients open emails based on subject lines alone. A great subject line can significantly boost your open rates and email marketing ROI. Test and optimize your subject lines for better performance.