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Score your email subject line out of 100 across 6 dimensions — length, personalization, urgency, spam triggers, emotional appeal, and relevance to your email type. Get specific improvement recommendations and 5 alternative subject lines using proven frameworks.
What you'll get
Length, personalization, urgency, spam, emotion, relevance.
Better subject lines using curiosity, urgency, social proof.
Flags words that trigger spam filters.
How it works
Type or paste your email subject line.
0-100 score with per-dimension breakdown.
5 framework-based alternatives ready to copy.
Try it free
No sign-up required. Results are instant.
30–50 characters is the mobile sweet spot. Most email clients truncate after ~80.
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