Full-featured API client that runs in your browser — make HTTP requests, edit headers/body/params, save collections, generate code snippets (cURL/Fetch/Axios). Your API keys never touch a server — everything runs locally.
Convert fetch() or axios JavaScript code to equivalent cURL commands with headers, methods, and request body intact.
Build HTTP requests with custom method, URL, headers, and body. Generate equivalent curl commands. Everything runs locally in your browser — nothing is uploaded.
Parse cURL commands to extract method, URL, headers, and body. Debug HTTP requests from cURL strings. Everything runs locally in your browser — nothing is uploaded.
Full-featured PDF editor that runs entirely in your browser — merge, split, fill forms, rotate pages, add/remove passwords, and edit metadata. Your files never leave your device — 100% private.
Converts alphanumeric text into International Morse code with audible beeps played through the Web Audio API, and decodes incoming Morse signals. Everything runs locally in your browser — nothing is uploaded.
API Builder & Tester lets you full-featured API client that runs in your browser — make HTTP requests, edit headers/body/params, save collections, generate code snippets (cURL/Fetch/Axios). Your API keys never touch a server — everything runs locally.. It works on any device with a modern web browser.
Full-featured API client that runs in your browser — make HTTP requests, edit headers/body/params, save collections, generate code snippets (cURL/Fetch/Axios). Your API keys never touch a server — everything runs locally. It runs entirely in your browser — no software installation or data uploads required.
Configure your settings below — the output generates instantly.
Yes. After the initial page load, API Builder & Tester runs entirely on your device with no internet connection needed. All processing is done locally.
GET, POST, PUT, PATCH, DELETE, HEAD, and OPTIONS. Each method can include custom headers, query parameters, and request bodies in JSON, form-data, or raw text.
Yes. Save requests into collections stored in your browser's local storage. Organize by project or API, and reload them anytime without re-entering details.
Yes. Add Bearer tokens, Basic auth, API keys, or custom header-based auth. The tool includes a built-in token manager for JWT and OAuth flows.
Yes. Generate equivalent code snippets in cURL, Fetch API, and Axios — copy-paste ready for your project. The generated code matches your exact request configuration.
No. Everything runs in your browser using the Fetch API. Your request data, headers, and tokens never leave your device.
API Request Builder
Build HTTP requests with custom method, URL, headers, and body. Generate equivalent curl commands. Everything runs locally in your browser — nothing is uploaded.
API Tester
Test any HTTP endpoint by sending GET, POST, PUT, or DELETE requests directly from your browser. View response status, headers, and body.