SSL Checker
Enter a domain to check whether its SSL certificate is valid and when it expires.
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How to Use SSL Checker
- 1
Enter a domain name.
- 2
Click Check to connect and retrieve its SSL certificate.
- 3
Review the validity, issuer and expiry date.
SSL Checker Features
- Shows certificate validity, issuer, subject, expiry date and days remaining.
- Displays the negotiated TLS protocol version and serial number.
- Connects directly to the domain's server on port 443 in real time.
Why use Tool King?
Fast
No waiting rooms or sign-ups. Most files are ready in seconds.
Private
Files are processed in memory and discarded right after — never stored or shared.
Free
Every tool is free to use, with no hidden limits on the essentials.
Frequently Asked Questions
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