RedoSan Authenticity
Free, open-source digital authenticity suite — watermark images, audio and documents, verify file fingerprints, read EXIF metadata, issue C2PA provenance, DID identities and signed passports. 100% in your browser, nothing leaves your device.
Launch the app → Source on GitHubOne binary.
Every authenticity tool.
The same engine that powers the web app ships as a command-line interface — 14 commands for watermarking, fingerprinting, provenance and more. Install once, script it anywhere.
- Node.js 22+ · zero native deps beyond canvas
- Pipe-friendly JSON output on every command
- GPL-2.0 · source on GitHub
# Install once
$ npm install -g redosan-authenticity-cli
# Embed an invisible watermark
$ redosan watermark embed -i photo.png -s secret.png -a lsb -p mypassword -o out.png
# Verify a fingerprint (JSON output)
$ redosan fingerprint file.bin --algo sha256 --json
# OpenTimestamps proof
$ redosan timestamp create doc.pdf -o proof.ots
# Read EXIF metadata
$ redosan metadata shot.jpg --json