Overview
A web interface for the distributed Certificate Transparency logs, allowing you to find subdomains by analyzing SSL/TLS certificates.
- Finds subdomains that haven't even DNS-resolved yet.
- Access to a massive, immutable log of certificates.
- Completely free.
- Interface is very basic and sometimes slow.
- Can return "noisy" results (expired or internal domains).
- Certificate Transparency Search.
- Wildcard search support.
- RSS feeds for monitoring.
- Subdomain enumeration via certificate logs.
- Monitoring for new certificates issued to a competitor or target.
Example view from crt.sh—tap to open full-screen for closer inspection.