Test any HTTP endpoint by sending GET, POST, PUT, or DELETE requests directly from your browser. View response status, headers, and body.
Content reviewed October 2026 · About Toolzum
Send HTTP requests from your browser — custom headers, bodies, params, saved collections, and one-click cURL/Fetch/Axios snippets. Developers debug a REST endpoint without leaving the tab — runs locally, free to start.
Build HTTP requests with method, URL, headers, and body — then generate matching curl commands. Prototype endpoints without leaving the tab — local, free, no signup.
Test webhook endpoints by sending simulated POST requests with custom JSON payloads. Verify your webhook handlers are working correctly.
Translate text between 16 languages with automatic source detection via the AI API. Bloggers localize a 500-word post in seconds — 1 credit per translation, sign in free for 5.
Encode images to Base64 data URIs for CSS embedding and API payloads. Inline a logo without extra requests — local encoding, free, no signup.
Endpoints, methods, headers, and bodies — REST, GraphQL, and SOAP calls alike.
Only for protected endpoints — public APIs test with no credentials.
Yes — status, body, headers, and round-trip time on every call.
Requests go to the APIs you target by necessity; the tool itself runs locally, free with no signup.
The first 2,000 characters, with an explicit truncation note stating how many total chars arrived when longer. Requests abort after 20 seconds, and only http(s) URLs are allowed.
API Request Builder
Build HTTP requests with method, URL, headers, and body — then generate matching curl commands. Prototype endpoints without leaving the tab — local, free, no signup.
JSON Formatter
Pretty-prints raw JSON with configurable indent width, key sorting, and bracket collapsing options while flagging syntax errors with exact.
Webhook Tester
Test webhook endpoints by sending simulated POST requests with custom JSON payloads. Verify your webhook handlers are working correctly.