Web & Network
A handful of tasks genuinely cannot run in a browser: resolving a domain’s DNS records, inspecting the SSL certificate a host presents, reading the HTTP response headers a server returns, or fetching a page’s Open Graph metadata for a link preview. These tools use our small server to perform the lookup and hand back the result — sending only the domain or URL required, storing neither the input nor the output, and guarding against abuse and requests to private networks. They are the deliberate exception to this site’s browser-only rule, built for the moments when you need to see what the network actually says.
DNS LookupLook up DNS records for any domain — A, AAAA, MX, TXT, NS, CNAME and SOA. Runs on our server so it works even behind a locked-down or private network.SSL Certificate CheckerCheck a site's SSL/TLS certificate from our server: expiry date, days remaining, issuer, subject and the SAN list — even for expired or self-signed certs.HTTP Header CheckerCheck the HTTP response headers of any URL: see the status, cache and cookie rules, plus security headers like HSTS, CSP, and nosniff. Server-side lookup.URL Metadata / OG PreviewPreview the Open Graph card Slack, Discord, and social sites build from a URL. Our server fetches the page and reads its og:title, og:image, and meta tags.What Is My IPSee the public IP address the internet uses to reach you, not your private LAN address, plus your user-agent and any proxy chain. A server-side lookup.