Remove content credentials from AI-generated files

Images, video and audio made with Claude, ChatGPT or Firefly carry a signed C2PA manifest that records which tool produced them. unmarking cuts that manifest out of the file. The media data is left byte for byte intact, and nothing is uploaded: the file is rewritten in your browser with WebAssembly.

Drop files here or browse Images, video and audio, up to 256 MB each

Details

Not removed: Invisible watermarks such as SynthID, and watermarks in generated text, are separate mechanisms and stay in place. Pixels, frames and audio samples are not changed, and other metadata such as EXIF is kept.
Privacy: Files are never uploaded. Everything runs in your browser, and the page has no analytics or third-party requests.
MCP and API: The same engine is available as a hosted MCP server for agents and as a free HTTP API. See the developer page.
Questions: What a content credential is, which formats work and how to verify a cleaned file are answered in the FAQ.