Prove it existed.

Stamp the fingerprint of any file onto a public blockchain — permanent, public, unfakeable. No wallet, no account.

X-Stamp a file

Drop a file here or browse

Your file never leaves your device.

Description (shown on the public stamp)

0 / 256 bytes

We hash your file locally in the browser. Only the fingerprint and a short description go on-chain — never the file itself.