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crt.sh | Certificate Search
Search and view SSL/TLS certificates from public Certificate Transparency logs for free. Quickly check issued certificates and their details online.
Find SSL certificates instantly by domain
crt.sh is a free online tool that lets you search for SSL/TLS certificates issued for any domain. By tapping into public Certificate Transparency logs, you can quickly see what certificates exist, who issued them, and when they were created.
This site is especially helpful if you want to check for unauthorized certificates, monitor your domains, or explore certificate data for security research. You don’t need an account—just enter a domain name and view up-to-date results.
Whether you’re a website owner, IT professional, or just curious about certificates, crt.sh makes it easy to explore and verify SSL information in a straightforward, searchable format.
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