Google's Certificate Transparency
Directory of all known Certificate Transparency logs monitored by Chrome and other browsers. Browse CT log records to discover issued certificates,…
Platforms: Web · Last verified September 7, 2026
Directory of all known Certificate Transparency logs monitored by Chrome and other browsers. Browse CT log records to discover issued certificates, identify unauthorized domain certificates, and monitor for certificate misuse.
Only use this tool against systems you own or are explicitly authorized to test — see the disclaimer.
Getting started
Best for: Certificate discovery, unauthorized cert detection, domain monitoring. See the official site linked above for details.