Email Subject Line Tester
Analyze your subject line for urgency, length, emojis, and potential spam triggers.
Why Test Your Subject Lines?
Your subject line is the first impression. It determines whether people open your email — or ignore it. This tool helps you write subject lines that stand out.
Tips for Better Subject Lines
- Use urgency or curiosity (e.g. “Only 24 hours left”)
- Keep it short — under 50 characters is ideal
- Use personalization, like “for you” or “your guide”
- Add emojis for visual contrast (but don’t overdo it)
Frequently Asked Questions
How does this test work?
It checks your subject line’s length, power words, urgency, and structure — then gives suggestions for improvement.
Does this tool improve open rates?
Yes, strong subject lines are proven to improve open rates. We help you get closer to what works.
Is my data stored?
No — everything runs in your browser. Nothing is saved or sent anywhere.
Can I test multiple subject lines?
Absolutely. You can test as many lines as you like, instantly.
Check out our other tools 👇