SSL via IP Checker
Check the SSL/TLS certificate for any IP address or hostname. We connect on the specified port (default 443) and return the certificate details: issuer, validity dates, and whether it's trusted. Handy for verifying certs before DNS is live or when testing by IP.
Check SSL by IP
Enter IP or hostname and optional port (default 443).
How to Use This Tool
Enter an IP address or hostname and optionally a port (443 is default). We open a TLS connection and fetch the server's certificate. You'll see whether it's valid, who issued it, and the validity period. If the connection fails, we report the error.
Why This Tool Matters
When you set up a new server or migrate to a new IP, you want to confirm the SSL certificate is working before pointing DNS at it. Checking by IP lets you verify the cert without waiting for DNS propagation. It's also useful when you have multiple hostnames on one IP — we use SNI to request the appropriate cert.
Use Cases
- Verify SSL cert before switching DNS to a new server
- Check cert validity on a load balancer or proxy by IP
- Debug certificate errors when accessing a site by IP
- Confirm expiry dates for certs on internal or staging servers
FAQs
What does SSL via IP checker do?
It connects to an IP address (or hostname) on a given port (usually 443) using TLS and retrieves the SSL/TLS certificate. You see issuer, validity dates, and whether the cert is trusted.
Why check SSL by IP?
When you host multiple sites on one IP (SNI), or you want to verify the cert before DNS is set up, checking by IP helps. Also useful for load balancers or direct IP access.
What if the cert shows as invalid?
The certificate may be for a different hostname (name mismatch), expired, or self-signed. Our check uses SNI when possible to get the right cert.
Can I test port 443 only?
You can test any port. Default is 443. Use the port field for custom ports (e.g. 8443).
Is this a security scan?
We only read the certificate. We don't test for vulnerabilities. For full SSL audits, use dedicated tools.