SSL Certificate Checker Online Free
Inspect SSL/TLS certificate configurations for any website. Check expiration dates, issuer credentials, certificate chains, key sizes, and detect HTTPS configuration issues instantly.
SSL Certificate Checker
Check SSL/TLS certificate status, issuer, expiry date and HTTPS configuration for a domain.
How to Use This Tool
Enter Domain Name
Type the target domain name (e.g. example.com) into the SSL check input field.
Run Certificate Check
Click the Scan or Check button to establish a TLS query.
Review Issuer & Chain
Inspect root and intermediate certificate authority details and validation chain levels.
Verify Expiry Date
Check expiration dates to schedule certificate updates and avoid server warnings.
Auditing a website certificate before deployment
You have installed a new Let's Encrypt certificate on app.company.com. Input the domain into the checker to confirm that the intermediate certificate chain is complete and that the certificate expires in exactly 90 days.
Common Use Cases
SysAdmins
Audit and verify intermediate trust configurations on production web hosts.
DevOps SREs
Check certificate expiry dates to prevent automated renew configuration failures.
Web Teams
Identify key mismatch issues and resolve 'insecure connection' browser alerts.
Security Analysts
Verify domain security levels, encryption key sizes (e.g. RSA 2048), and TLS protocols.