What is a content credential?
A signed C2PA manifest stored inside the file that records which tool made it and what was done to it since. Claude, ChatGPT, Adobe Firefly and other AI tools attach one to everything they generate.
Frequently asked questions
Does removing it change the image, video or audio?
No. The manifest is a separate block in the file. Pixels, frames, audio samples and metadata such as EXIF stay byte for byte as they were, the file just gets a little smaller.
Does it remove SynthID or other invisible watermarks?
No. Those are embedded in the pixels or audio samples themselves and are a different mechanism. Watermarks in generated text are not touched either.
Which formats are supported?
JPEG, PNG, GIF, WebP, TIFF, DNG, HEIC, HEIF, AVIF, SVG, MP4, MOV, AVI, M4A, MP3 and WAV, up to 256 MB each. The API and MCP server also take JXL and FLAC. PDF is not supported.
Is anything uploaded?
No. The file is rewritten and verified in your browser, and the page has no analytics or third-party requests.
How can I check that the credential is gone?
Every result is inspected again before download, and each cleaned file links to an independent checker: Anthropic's file checker for files signed by Claude, Content Credentials Verify for anything else.