Check
Check For A Claude Watermark
Claude watermark checker searches almost always end in the same disappointment, so here is the honest position up front: Anthropic has not released a public detector for the text watermark, which means no tool can currently tell you whether text carries it. File provenance is a different story — C2PA metadata is fully inspectable today, and you can check it yourself in seconds.
Runs in your browser. No signup, no upload, nothing stored.
Text
- Claude Watermark CheckerText: not checkable by anyone yet. Files: fully checkable, right now, in your browser.
- Claude Watermark DetectorNo public detector exists. Nobody outside Anthropic can currently verify a text mark.
- How To Check If Text Has A Claude WatermarkWork backwards from which model produced it, when, and how heavily it was edited since.
Files
Seeing one
Check what your text and files actually carry
Runs in your browser. No signup, no upload, nothing stored.