Crt.sh Search
Free online crt.sh helper for finding subdomains in certificate transparency logs.
How to Use Crt.sh Search
Open the Crt.sh Search tool on toollabs.in.
Enter the domain, IP address, or network parameter you want to analyze.
The tool generates the appropriate command or queries the relevant DNS/network service.
Review the results including technical details, response data, and suggested next steps for troubleshooting.
Why Use Crt.sh Search?
Crt.sh Search on toollabs.in is designed to be the fastest, most privacy-respecting option available online. Unlike many alternatives, our tool processes everything directly in your browser — your data never touches our servers.
Whether you're a developer debugging an API, a student learning network concepts, or a professional working with sensitive data, Crt.sh Search provides a reliable, zero-cost solution with no registration required.
Built with modern web standards and optimized for performance, the tool loads instantly and works across all devices — desktop, tablet, and mobile. It even works offline after the initial page load.
100% Free
No subscriptions, no paywalls, no hidden costs
Privacy First
All processing happens in your browser
Lightning Fast
No server latency, instant results
No Signup
Start using immediately, no account needed
Frequently Asked Questions
Why use crt.sh?▼
Certificate transparency logs often reveal subdomains that are not documented elsewhere.
Does it find hidden hosts?▼
It can reveal public subdomains from issued certificates and related domains.
Use Cases
Reconnaissance
Discover subdomains during security review
Brand Monitoring
Track certificates issued for related domains
Examples
Search Domain
Input:
example.com
Output:
https://crt.sh/?q=%25.example.com
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