C2PA Metadata Checker
This is a quick, in-browser scan for the usual C2PA / Content Credentials markers inside an image. It reads the file right here on your device. Nothing gets uploaded.
Choose an image to scan.
Important: this is a lightweight scan, not a full validator. It catches the common markers, but when you need a definitive answer, go to the official Content Credentials Verify tool.
What this checker looks for
Nothing fancy. It reads the raw bytes and watches for a handful of tell-tale signs:
- JUMBF box markers: the binary container format C2PA uses to embed manifests inside files.
- C2PA label strings: well-known identifiers like
c2pa.assertions,c2pa.claim,c2pa.manifest, and thejumbftag. - Format-specific signals: JPEG
APP11markers, the PNGcaBXchunk, and RIFF chunks in WebP that commonly carry C2PA payloads.
What "no obvious markers" doesn't mean
A "no obvious C2PA markers found" result means this scanner didn't spot any of the patterns it knows. It does not mean the file is definitely clean. A few ways it can miss something:
- The file uses a container or marker format we don't scan for.
- The C2PA data is referenced externally (a "soft binding") rather than embedded.
- Pixel-level fingerprints or invisible watermarks are not detectable by a metadata scan.
For anything load-bearing (journalism, legal, evidentiary use), verify with the official Content Credentials Verify tool.
Related
- Remove C2PA metadata from a PNG or WebP image (browser-side).
- What is C2PA metadata? (a plain-language primer)
- Remove Content Credentials from an image (overview of the same workflow)