Check a sealed record yourself.

The NXL Verifier grades a seal from the organisations you choose to trust, not from what the seal says about itself. It runs in your browser.

Try the sample

A sample seal is built into the Verifier. It is invented demonstration data, signed by a demonstration organisation. Four buttons at the top of the Verifier check the sample seal, check a tampered copy of it, and check two proofs that each reveal a single field.

Check the file you download

The fingerprint of the downloaded file should read as below.

On a Mac, run this in Terminal:

On Windows, run this in Command Prompt:

What it does, and what it does not

• It runs in your browser. The file carries its own content-security policy, which blocks every network request after the page has loaded. Nothing you load into it is uploaded.
• It shows which data was sealed, who signed it judged against the organisation you chose to trust, and that any change, however small, is caught.
• It does not show that the data is accurate, fair or lawful, that the evidence is sufficient for your purpose, or when the seal was made beyond the signer's own clock.