Will your subject line hit spam? Score it free. No sign up, no sign in.

100% free. No sign up. No sign in. Runs in your browser.

Type a subject line and get an A-F score in real time. Checks length against Gmail's truncation thresholds, scans for 47 known spam trigger words, flags ALL CAPS shouting, excessive punctuation, currency symbols, and unresolved merge tags like {{first_name}}.

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