Check a receipt

Drop in a peer.io receipt, and the file if you have it. Everything is checked here in your browser: nothing is uploaded.

1. The receipt Drop it here or click to choose 2. The file Optional. Drop it here or click to choose

What a check shows

Signatures: both browsers signed the receipt’s details at the end of the transfer. If anything in them has been changed since, the signatures no longer match.
Seal: peer.io added its own signature and the time, from its own clock. That shows the receipt existed, exactly as it is now, at that time. peer.io was only ever sent a scrambled value, not the receipt or the file.
File: the file’s fingerprint (SHA-256) is worked out again here and compared with the receipt’s. Change one byte and it won’t match.

A receipt doesn’t show who either person was: anyone with the code or link could receive a transfer. The start and finish times come from the recipient’s device; only the seal’s time comes from peer.io. See the FAQ for more.

Check a receipt

Result