OCSP Stapling Checker

Check if a domain supports OCSP stapling

Responder URL

Status

About OCSP Stapling Checker

OCSP stapling lets web servers cache and present the certificate revocation status during the TLS handshake, eliminating the need for browsers to contact the CA's OCSP responder directly. Our OCSP Stapling Checker tests whether a server supports this optimization and validates the OCSP response it provides.

How to Use

1Enter the domain name you want to test for OCSP stapling support.
2Click "Check" to connect and test the server's OCSP stapling configuration.
3Review the stapling status, responder URL, and OCSP response details.

Use Cases

•Verify OCSP stapling is properly configured on your web server
•Improve TLS handshake performance by enabling stapling
•Reduce load on CA OCSP responders for better scalability
•Audit server configuration for privacy-enhancing TLS features

Frequently Asked Questions

It improves privacy (browsers don't leak browsing history to CAs), speeds up TLS handshakes, and reduces the load on CA infrastructure. Without it, every visitor must contact the CA to verify revocation.

On Nginx add `ssl_stapling on;` and `ssl_stapling_verify on;` directives. On Apache use `SSLUseStapling on`. Both require a properly configured certificate chain.

The OCSP Must-Staple extension (TLS Feature) tells browsers they must refuse connection if the server doesn't provide a stapled OCSP response, making revocation checking mandatory.

Tips & Best Practices

•Enable OCSP stapling to improve TLS handshake performance
•Monitor OCSP response freshness to avoid serving stale data
•Configure OCSP stapling timeout for reliable operation
•Test OCSP stapling from multiple clients for compatibility

Technical Details

Protocol: Online Certificate Status Protocol (OCSP) stapling support
Performance: Handshake improvement through cached OCSP responses
Freshness: OCSP response freshness and update mechanism
Output: OCSP stapling status with configuration recommendations