Build HTTP requests with method, URL, headers, and body — then generate matching curl commands. Prototype endpoints without leaving the tab — local, free, no signup.
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.
Parse curl commands into method, URL, headers, and body parts for debugging. Dissect a failing Stripe call field by field — local parsing, free, no signup.
Build and test SOAP API envelopes with WSDL URL, method name, and XML parameters. Generate complete SOAP request envelopes.
Encode images to Base64 data URIs for CSS embedding and API payloads. Inline a logo without extra requests — local encoding, free, no signup.
Renders a scannable QR code from any text or URL with a client-side Reed-Solomon encoder at fixed high error correction. Customize size, colors, and center logo, then download the PNG — free, local, no signup.
Set GET with the endpoint URL, add headers (Authorization: Bearer <token>), then send: status, timing, and body return instantly. Save working calls into collections.
Yes — requests fire from your browser with the Fetch API against live endpoints. Use staging URLs and test keys; production secrets stay out of the tool.
Yes — every built request generates an equivalent curl command for terminals, docs, and bug reports. Headers and bodies translate exactly.
No — requests run locally in your browser; keys never pass through our servers. Collections save to localStorage on your machine only.
The builder keeps your text but excludes it from the curl, appending a "# Body omitted: GET requests carry no body" note. Five methods are offered (GET, POST, PUT, PATCH, DELETE), and header lines without a colon are rejected as bad lines.
API Tester
Test any HTTP endpoint by sending GET, POST, PUT, or DELETE requests directly from your browser. View response status, headers, and body.
API Builder & Tester
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.
HTTP Headers Generator
Generate common HTTP headers for JSON, REST, and GraphQL APIs with correct Content-Type and authorization patterns. Code never leaves your device — formatting and validation run locally in your browser.