About this tool
SSL lookup
Validate TLS and inspect the server certificate
The online package provides the interface only; this website cannot execute this network query. Use the matching local runtime package with Node.js 20+, run node server.cjs, then open http://127.0.0.1:47831/en/index.html.
Built-in input example:
example.com
Connects to port 443 and reports certificate errors as received.
Frequently asked questions
What does this tool do?
Validate TLS and inspect the server certificate
How do I use this tool?
The online package provides the interface only; this website cannot execute this network query. Use the matching local runtime package with Node.js 20+, run node server.cjs, then open http://127.0.0.1:47831/en/index.html.
Which settings can I change?
There are no extra settings. Supply data using the input area shown on the page.
What should I check before using it?
Connects to port 443 and reports certificate errors as received.
The online package provides the interface only; this website cannot execute this network query. Use the matching local runtime package with Node.js 20+, run node server.cjs, then open http://127.0.0.1:47831/en/index.html.
Where is my input sent?
The local service sends query targets to the relevant public network, DNS or registration service. Private network addresses are not supported. External services may be unavailable or rate-limited.