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Headline & Email Subject Inspector

Runs on your deviceWriting toolFree to use
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Measure text and estimated pixel widths, flag potentially awkward punctuation/repetition and show platform-neutral headline and subject-length heuristics.

Workspace
Preparing your workspace…
Files and inputs stay on your device. Use Reset to clear this workspace.

Useful to know

Is there a subject-line score for opening rates?

No. Length, repetition and preview width do not reliably predict opens, deliverability or search rankings. The output describes the supplied text.

Where are my files and inputs processed?

This tool processes your entries on your device. It does not upload them or save them in an account. Downloads remain on your device; Reset clears the current tool workspace.

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