Security
Check certificates, HTTP headers, open ports and leaks that expose your connection.
What it is and what it is for
These tools show what a website's server exposes and what your own connection reveals: TLS certificate, HTTP headers, open ports and leaks that bypass a VPN.
When to use it and which problems it solves
Use them before publishing a site, when the browser warns about an expired certificate, to check whether your real address leaks through WebRTC, or to review the security a server declares.
Main tools
- SecuritySSL CheckerLook up SSL/TLS certificates issued for a domain.
- SecurityHTTP Headers CheckerInspect the HTTP response headers of any website.
- SecurityPort CheckerTest HTTP and HTTPS port reachability on a public host.
- SecurityWebRTC Leak TestCheck whether your browser exposes local or public IP addresses through WebRTC.
- DNS & domainsDNS CheckerQuery A, AAAA, MX, TXT, CNAME, NS and SOA records for any domain.
- DNS & domainsMy DNSDiscover which DNS servers resolve your queries.
Every tool in this category
4 tools