Email Subject Line Tester
Score a subject line for length, spam triggers, emoji, and personalization.
39 characters (60± recommended for mobile)
Spam risk score
79/100
Spam word hits
2
Emoji count
1
ALL-CAPS ratio
29%
Spam phrases detected
act now, limited time
Likely clean — deliverable without major spam flags.
Heuristic check only — inbox placement also depends on sender reputation, list quality, and the receiver's ESP spam rules. Always pair with a real spam-test tool before high-stakes sends.
关于此工具
Paste a subject line (and optional preview text). Get a heuristic score, the word / character / mobile-visible length, word-level spam-flag hits (FREE, ACT NOW, $$$, etc), emoji count, ALL-CAPS check, and recommended tweaks. A local first pass before sending through a real ESP preview — answers the r/marketing 'will this go to spam' question.
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