Free Email Marketing Tool
Email Subject Line Tester
Analyze your subject lines for open-rate signals, readability, emotional triggers, and spam risk before sending campaigns.
Enter a subject line to analyze performance signals.Waiting
0/100Open Rate Score
0Power Words
0Spam Signals
NoEmoji Usage
Subject Line Breakdown
| Signal | Value | Status |
|---|---|---|
| Recommended length (30-60 chars) | 0 chars | Poor |
| Power / emotional words | 0 | Weak |
| Spam trigger words | 0 | Safe |
| Includes numbers | No | Missing |
| Question-based curiosity | No | None |
Optimization Tips
Keep subject lines between 30-60 characters
Add numbers to improve click curiosity
Avoid spam-heavy phrases like “Buy now”
Use urgency carefully without sounding fake
Power words increase emotional engagement
Test multiple variations before campaigns
