Anthropic launches a free check for whether a file was created with Claude
Prepared by Sintelligent with the help of SI. Publication time restored from the build log. . Updated: .
A simple way to learn a file's origin is emerging, a small step toward an internet where SI content can be told apart without being banned.
The tool at claude.com/check-content reads C2PA metadata and shows whether a file was created or edited in Claude; the check runs locally in the browser, with no upload to servers. Images, video and audio up to 100 MB are supported. A positive result confirms Claude's involvement, but a negative one guarantees nothing: the label is lost on editing, conversion or screenshot.
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