OCSP Evaluator

Is the certificate of this site revoked? OCSP Evaluator checks it directly from your browser with OCSP and CRL, at the authority that issued it, with verified response signatures and no third-party server.

Version 1.0 is a complete rewrite: the old version sent the visited domain to an external API, the new one does everything locally in Firefox (desktop and Android).

Install from Mozilla Add-ons: https://addons.mozilla.org/firefox/addon/ocsp-evaluator/

Features

Revocation check with OCSP and CRL fallback on the real certificate chain, signatures verified
Grade A+ to F, expiry, issuer, DV/OV/EV, TLS version and key algorithm
Revoked site: warn, block the page, or strict mode
Monitor: your domains rechecked every 12 hours with notifications
History, chain and report export, copy certificate as PEM, check any site on demand
No third-party server, no statistics. Light and dark theme, English and Italian

Project Samples

Valid site: grade A+, OCSP verified at the issuing authority

Revoked certificate detected (dark theme)

Block page for a site with a revoked certificate

Monitor: your domains rechecked every 12 hours

Project Activity

See All Activity >

License

Apache License V2.0

Follow OCSP Evaluator

OCSP Evaluator Web Site

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Additional Project Details

Operating Systems

Linux, Mac, Windows

Languages

English

Intended Audience

Advanced End Users, Developers, End Users/Desktop

User Interface

Web-based

Programming Language

JavaScript

Related Categories

JavaScript Browser Extensions and Plugins

Registered

2021-07-05

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