APN · File Witness

AI never overwrites a verified fact.

Drop a file. Its SHA-256 fingerprint is computed in your browser, so the original file never leaves your device during local inspection. Verified facts, file-reported metadata and AI interpretation remain permanently separated.

Try File Witness →Open the Inspector
  • Browser-local hashing
  • SHA-256 fingerprint
  • Optional AI
  • Separated evidence lanes
  1. Step 1
    Select a file
    Drag in a photo, or pick one from your device.
  2. Step 2
    Hash and inspect locally
    SHA-256 and metadata computed in your browser.
  3. Step 3
    Review separated evidence lanes
    Verified facts, file-reported metadata, AI interpretation and unknowns remain clearly separated.

What this provides

  • SHA-256 fingerprint of the inspected file
  • File type, size and image dimensions where available
  • Available EXIF/XMP metadata
  • Clear separation of computed facts, file-reported metadata and AI interpretation
  • Downloadable inspection record
  • Local-only inspection without AI

What this does not prove

File Witness records what this browser computed and read from the supplied file. It does not independently establish authenticity, authorship, ownership, capture date, location, chain of custody or legal admissibility.

This inspection record is not, by itself, proof of authenticity, ownership, authorship, chain of custody or legal admissibility.