Subject Line Tester
Analyze your email subject line's strength. We check for length, spam triggers, and emotional impact to maximize your open rates.
Subject Strength Score
0
Enter a subject to begin analysis.
Length Audit
-
Spam Risk
None
Sentiment
Neutral
Strategic Email Engagement & Audit
The subject line is the single most important factor in email marketing. Even the best content fails if the recipient never opens the message.
- ✓ Mobile Optimization: Aim for 40-60 characters. Mobile devices often truncate subject lines longer than 60 characters.
- ✓ Spam Trigger Bypass: Avoid words like "FREE", "URGENT", and excessive exclamation marks to stay out of the junk folder.
- ✓ Psychological Anchoring: Use numbers, questions, or curiosity gaps to create an immediate "need-to-know" response.