Claude Watermark Remover
This page cleans the parts of Claude output that can be cleaned, and refuses to pretend about the part that cannot. If you want the shortest true answer: the statistical mark is a rewrite problem, not a stripping problem.
- Hidden characters
- Available: Available Safe set by default; the rest opt-in
- Clipboard artifacts
- Available: Available
- Lookalike characters
- Unavailable: Unavailable Flagged, never removed
- Statistical watermark
- Unavailable: Unavailable Not locally removable
- Verification
- Re-scan of the cleaned text
- Uploaded
- 0 bytes of your text
- Watermark type
- Statistical text watermark
- Hidden characters
- No
- Official detector
- Partial: Partial Private preview, by access request
- Public API
- Partial: Partial Waitlist or restricted access
- DetectMark support
- DetectMark support: Announced Ready when access is granted
- Removal
- Partial: Partial Full rewrite only; unverifiable
The one thing to understand first
Most tools sold as Claude watermark removers scan for zero-width characters. Anthropic never put any there. The removal therefore succeeds at removing something, and that something is not the watermark.
That is worth stating precisely, because the failure mode is false confidence. Text that comes back "clean" from a Unicode stripper is exactly as marked as it was before, if it was marked at all.
What does affect a statistical mark
Anthropic published two endpoints and left the middle deliberately vague. Light editing "probably won't remove the watermark completely". A complete rewrite where every word is replaced will. Translation by Claude carries the mark forward, because every word in the translation is still chosen by Claude.
In practice that leaves three levers with any published effect: a full rewrite through a non-Claude model, a full rewrite by hand, or translation through a non-Claude route. All three cost tone and quality, which is usually the reason the text was generated in the first place.
What this page does
It removes the hidden Unicode that is safe to remove by default, strips clipboard HTML fragments, flags riskier characters for opt-in cleanup, shows a diff so you can see each edit, and re-scans the result to confirm the removal. Then it prints the unchanged note for the statistical category, every time, whether or not anything else was found.
Below the result it offers the one lever that does touch the mark: a full rewrite through OpenAI, sent only when you confirm a dialog that states the exact size of the text, and shown beside the original with a count of how much wording changed. It carries no claim about the outcome, because nothing outside Anthropic's private preview can verify it. The statistical row stays Unknown either way.
FAQ
Only a heavy rewrite through a non-Claude model, a full manual rewrite, or translation through a non-Claude route can weaken or remove the statistical mark. Anthropic said as much on August 14, 2026. No tool can strip it as characters. This page offers the rewrite through OpenAI on your request, with a receipt and without a verdict, because nothing can verify the result.
By default: zero-width spaces, soft hyphens, interior byte-order marks, and clipboard HTML fragments. Spacing characters such as non-breaking spaces are an opt-in replace, and joiners, variation selectors and bidi controls are flagged and individually removable with a warning. It does not rewrite or paraphrase anything.
Most strip hidden characters that Anthropic never inserted. A few are paraphrasers. None can verify success against Anthropic's mark today, because there is no public detector to verify against.
Probably not. AI detectors classify by style. Removing hidden characters does not change writing style.
No. Scanning and cleaning both run as code in this browser tab, and zero bytes of your text are sent anywhere.
Every check runs in your browser: how it works. The limits are written down too: what DetectMark cannot remove.