Seal a record
A fresh key signs your data in your browser and is discarded after. Proves the data is unaltered, not that it is true. What this is →
Title, timezone, and private fields (optional)
Optional. Commit to a value without putting it in the record in the clear.
Press and hold for 2.5s to seal (or focus it and hold Space). Prefer not to? Seal without holding, below.
Verifying cryptography in your browser…
Drop a record and check it offline, in your browser. Confirms the data is unaltered and matches the seal, not that the claims are true. What this is →
Pin an issuer key, or paste bundle.json
Watch a real record verify, end to end
No record to hand? The sample is a real, self-contained record. It is re-hashed and checked in your browser, content and all, and lands on the same VERIFIED readout any record does.
Verify offline, forever
This page runs in your browser, but you do not have to trust even that. The open verifier is one self-contained file: no network, no server, every line auditable. Download it, check its SHA-256 against the published trust root, and verify any record on your own device, today or in ten years.
Download the offline verifierOpen it in a tab