TLS/SSL Certificate Checker
Connect to a host and port to inspect its TLS/SSL certificate — expiry, trust status, full chain, protocol, and cipher suite.
By using this server side tool, you agree to our privacy policy.
Input
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Output
Enter a host and fetch to see the certificate details here
Subject alternative names
| # | Subject alternative names |
|---|---|
| No data available | |
0 rows
Certificate Chain
| # | Subject (Common Name) | Issuer (Common Name) | Valid to | Status |
|---|---|---|---|---|
| No data available | ||||
0 rows
Readme
What is a TLS/SSL certificate check?
Every HTTPS website presents a TLS (formerly SSL) certificate to prove its identity and encrypt traffic. That certificate has an expiration date, a chain of issuing authorities, and must be signed by a certificate authority your browser trusts — if any of that is wrong, visitors see security warnings.
Tool Description
The TLS/SSL Certificate Checker connects directly to a remote host and port from our server and performs a real TLS handshake, then reports back what certificate the server presented — without exposing your own IP address or requiring any local tools.
Features
- Server-Side Handshake: Our server connects to the target host and port, so nothing runs in your browser or reveals your IP
- Expiry Tracking: Shows validity dates and days remaining, and flags expired or soon-to-expire certificates
- Trust Status: Reports whether the certificate chain is trusted and, if not, why
- Full Chain: Lists every certificate in the chain, from the leaf up to the root, including self-signed roots
- Connection Details: Surfaces the negotiated TLS protocol version and cipher suite
- Safe by Design: Only public hostnames and IP addresses can be checked — requests to private, loopback, and internal network ranges are rejected
Comments
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Tool info
Created
Last updated
Tags
tlssslcertificatehttpsx509checkervalidatorserverexpirycipherchainnetworksecurity
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Disclaimer
The tools provided on this website are designed to assist users in solving various problems. While we strive to ensure that the tools are accurate and effective, we do not guarantee or warrant that the output of any tool will be 100% accurate or error-free. The results generated by these tools are provided as-is and should be used with caution. We recommend that users verify any important information or results with additional resources or professional advice, as we cannot be held responsible for any consequences arising from the use of these tools. By using this website, you agree to assume all risks associated with the accuracy and use of the results provided.