Certz Verifier

by Cellact BV · Privacy & Security

Manifest V3 Free

View in Chrome Web Store Data as of 15 Oct 2026

Verify a site's Certz certificate: CA chain, on-chain registry, and a live proof-of-possession challenge beside TLS.

Users

−1 in 30 days

Rating

0.0 / 5

unchanged in 30 days

Ratings

0 in 30 days

Store rank

#286K

#236K among extensions

Version

0.2.2

updated 30 Jun 2026

Users

monthly, 4 months

Latest, 15 Oct 2026: 4 usersMove the mouse over the chart for any month

Ratings count

monthly, 4 months

Latest, 15 Oct 2026: 0 ratingsMove the mouse over the chart for any month

The Chrome Web Store rounds user counts down to the leading digit, so the user line moves in steps. The ratings count is exact and is the better signal of real adoption.

About Certz Verifier

Certz Verifier is an advisory browser extension for checking Certz-issued certificates. When opened on a website, it verifies: - the site publishes a Certz certificate - the certificate is signed by the pinned Certz CA root - the certificate matches the current hostname - the certificate digest is recorded on the Oasis Sapphire testnet registry - the site can sign a fresh nonce, proving it currently holds the matching private key Certz Verifier does not replace browser TLS validation, install a trusted root, change the browser lock icon, or intercept HTTPS traffic. It is an out-of-band verification layer for the Certz research demo.