Build HTTP requests with custom method, URL, headers, and body. Generate equivalent curl commands. Everything runs locally in your browser — nothing is uploaded.
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.
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.
Convert fetch() or axios JavaScript code to equivalent cURL commands with headers, methods, and request body intact.
Takes any long URL and generates a compact, shareable short link with optional custom alias support. Uses cloud-based processing.
Calculate body fat percentage using the US Navy circumference method. Enter waist, neck, height, and hip measurements. Everything runs locally in your browser — nothing is uploaded.
API Request Builder lets you build HTTP requests with custom method, URL, headers, and body. Generate equivalent curl commands. Everything runs locally in your browser — nothing is uploaded.. It works on any device with a modern web browser.
Build HTTP requests with custom method, URL, headers, and body. Generate equivalent curl commands. Everything runs locally in your browser — nothing is uploaded. 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 Request Builder runs entirely on your device with no internet connection needed. All processing is done locally.
Build HTTP requests with custom method, URL, headers, and body. Generate equivalent curl commands. Everything runs locally in your browser — nothing is uploaded. All processing runs locally — no code is sent to any server.
Tools cover JavaScript, CSS, HTML, SQL, Python, JSON, XML, CSV, and more. Check the tool description for specifics.
Yes. Since processing is local, performance depends on your device. Most operations handle large files without issue.
Yes. Formatters use well-known libraries (sql-formatter, Prettier-compatible patterns) and follow widely adopted rules.
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
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.
HTTP Headers Generator
Generate common HTTP headers for JSON, REST, and GraphQL APIs with correct Content-Type and authorization patterns. Everything runs locally in your browser — nothing is uploaded.