Web & Protocol Testing tools
HTTP and application-layer testing: request inspection, response headers, redirect chains, URL structure and mail transport checks.
HTTP Header Reference
Searchable reference of the HTTP request and response headers that matter for security, caching and proxying, with recommended values.
User Agent Parser
Break a User-Agent string into browser, engine, operating system and device type, and detect obvious bots and automation clients.
WebSocket Tester
Open a real WebSocket connection from your browser, measure handshake time, optionally send a message and see what comes back.