Email Subject Line Tester
Test and score email subject lines for length, spam triggers, personalization, urgency, and predicted open rates.
Embed this tool52 characters · 9 words
Subject Line Score
57
Predicted Open Rate
12-18%
Spam Check
Clean
Urgency
No
Curiosity
No
Personalization
Yes
Emoji
No
Length
52 chars
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Email Subject Line Best Practices
Your subject line is the gatekeeper of your email. A strong subject line determines whether your message gets opened or ignored. Here are proven strategies to improve open rates. For more writing help, try our Headline Analyzer or generate social copy with the Social Media Post Generator.
Subject Line Formulas That Work
- Question: "Are you making this SEO mistake?"
- How-to: "How to [Achieve Result] in [Timeframe]"
- Personal: "[Name], your exclusive offer expires tonight"
- Urgency: "Last chance: 50% off ends at midnight"
- Curiosity: "The one trick top marketers don't share"
External References
Frequently Asked Questions
The ideal length is 30-50 characters or about 5-8 words. This ensures the full subject is visible on both desktop and mobile devices, maximizing open rates.
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