Request and header tools
Use the REST endpoint tester when you need to fire GET/POST with a body. Header inspector and header diff are for comparing what the server sent. Query string parser is local decode, not a crawler.
Content-Type Parser and Bearer Token Extractor alias the Content-Type vs body sniff and JWT Claims Inspector. Bookmark the canonical pages; extra names in the grid are the same URLs.
API Header Inspector
Analyze request and response headers for any URL. See all headers, status, latency. Free API header viewer.
/api/api-header-inspector
REST Endpoint Tester
REST API tester: send GET, POST, PUT, PATCH, DELETE with custom headers and body. Free API testing tool. No signup.
/api/rest-endpoint-tester
Query String Parser
Parse URL or raw query string into key-value parameters. Decode percent-encoding. Free query parser.
/api/query-string-parser
Status Code Tester
Send request, see HTTP status code, response time, and explanation. Free status code checker. No signup.
/api/status-code-tester
Header Diff Checker
Compare two sets of HTTP headers: see added, removed, changed. Debug header differences. Free online tool.
/api/header-diff-checker
Content-Type Parser
Parse Content-Type header: type, subtype, charset, boundary, params. Free header parser for API debugging.
/content-type-body-check
Bearer Token Extractor
Extract scheme and credentials from Authorization header. Decode Basic auth. Free header parser.
/jwt-claims-inspector
FAQ
- Does REST Endpoint Tester store my secrets?
- Requests go from this server or your browser depending on the tool. Do not paste production keys into a public tester.
- Why is status 200 but the body is wrong?
- Status Code Tester only explains the code. Validate the body with JSON Schema or the JSON validator.