Public beta

Prove a file existed, without showing it to anyone.

Drop in your files. Each one is hashed in your browser with SHA-256 — only the fingerprint is sent, never the file. You get a receipt you can check yourself, anchored on the MoonBite and Bitcoin blockchains.

What you get

A .mbreceipt.json for each file. It contains the fingerprint, the Merkle proof and the blockchain anchors, so it verifies even if this site is offline. Check any receipt on the Verify page or with the standalone verifier.

A stamp proves a file existed no later than a time. It does not prove who made it, or that its contents are true. See Limits.