Anthropic launches a Claude content checker that reads C2PA credentials to tell if a file was made or edited with Claude

Check if a file was made with Claude

Anthropic released a browser-based tool at claude.com/check-content that checks uploaded images, video, or audio for a C2PA content credential tied to Claude. The tool only reads the embedded credential, not the file itself, and the file never leaves your device. A positive result means Claude processed the file; it says nothing about the content's truthfulness. A missing signal doesn't rule out Claude—the credential could have been stripped, or the model/platform may not support marking. Supported formats include JPG, PNG, MP4, MP3, up to 100 MB.