🔒
SSL Certificate Checker
Check a site's SSL certificate and expiry.
Loading tool…
How to use the SSL Certificate Checker
- 1Enter a domain name that uses HTTPS.
- 2Click Check SSL certificate.
- 3See the validity, issuer, covered domains and days until expiry.
About the SSL Certificate Checker
Free SSL certificate checker — see whether a website's HTTPS certificate is valid, who issued it, the domains it covers and exactly how many days until it expires.
Part of our Web & Network collection. Browse all tools.
Frequently asked questions
- Is it free to use?
- Yes, it's 100% free with no sign-up and no limits.
- How is the certificate read?
- Our server opens a secure connection to the site on port 443 and inspects the certificate it presents — the same one visitors receive. Nothing is changed on the site.
More Web & Network
→
⚡
Internet Speed Test
Test your download, upload, ping and jitter.
→🌐
What Is My IP
See your public IP address and device info.
→🌐
DNS Lookup
Look up DNS records for any domain.
→🔎
WHOIS Lookup
Look up domain and IP registration details.
→📋
HTTP Header Checker
View the HTTP response headers of any URL.
→🌍
IP Geolocation Lookup
Find the location and ISP of any IP.