Email Subject Line Tester
Score your email subject lines based on length, power words, emoji, personalization, urgency, and spam risk. Get actionable improvement suggestions.
Your Subject Line
Enter a subject
Type your subject line above
Enter a subject line to analyze
No power words found. Add words that trigger emotion
No emoji - consider adding one to stand out in crowded inboxes
No personalization detected. Use 'you/your' or merge tags like {first_name}
No urgency signals. Consider adding time-sensitivity when appropriate
Low spam risk - looks clean
Suggestions for Improvement
- →Add a power word like 'discover', 'proven', or 'exclusive'
- →Include 'you' or 'your' to make it feel personal
- →Try adding a single relevant emoji for visual impact
Free Email Subject Line Tester
Optimize your email subject lines before hitting send. Our analyzer scores your subject across six key metrics that impact email open rates.
What We Analyze
- Character and word length optimization for mobile and desktop
- Power words that drive emotional engagement
- Emoji usage for visual differentiation
- Personalization indicators for reader connection
- Urgency signals that motivate action
- Spam trigger detection to avoid filters
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Disclaimer: This tool is provided as-is for informational and educational purposes only.