Testing Tools

Live test HTTP responses, redirect chains and status codes for one or multiple URLs, live and from different countries.

Check if HTTP compression is enabled for any URL.

Check if HTTP caching is properly configured for any URL.

Check if HTTP/2 is enabled for any URL.

Check if HTTP/3 is enabled for any URL.

Check and validate speculation rules on any website, and observe live prefetch and prerender activity.

Check the SSL/TLS setup of any host: certificate chain, expiry, ciphers, HSTS, and revocation.

Test how your code reacts to varying HTTP responses. Supports different status codes, methods, headers, as well as JSON and delayed responses.

Parse any URL into its components.

Validate HTTP Content-Type headers and MIME types for any URL.

Find the subdomains of any domain.

Check which ports are open, free and online with no account needed.

Check the SPF, DKIM and DMARC records of any domain.