#http

Paste a curl command, inspect the request shape, and export fetch, axios, or Python requests code.

Free HTTP request builder: pick a GET/POST/PUT/PATCH/DELETE/HEAD/OPTIONS method, query params merged into the URL, headers and a raw or JSON body, then copy the live cURL, fetch and raw HTTP/1.1 output in one click. Nothing is ever sent — code generation only, 100% in-browser.

Free in-browser tool to generate and decode an HTTP Basic Auth header from a username and password. UTF-8-safe Base64, Authorization header, curl examples, and a decode panel.

Free User-Agent parser that breaks any User-Agent header into browser (Chrome, Firefox, Safari, Edge, Opera), layout engine (Blink, Gecko, WebKit, Trident), operating system (Windows, macOS, Linux, Android, iOS) and device type (desktop, mobile, tablet, bot). Prefilled with your own browser's string, with live parsing and one-click copy — 100% in-browser.

Turn a sample response into reusable mock payloads, curl snippets, fetch calls, TypeScript types, and OpenAPI response blocks.

Build, simulate, analyze, and live-test CORS configurations across every server stack.

Read raw response headers, highlight missing security protections, and summarize cache and CORS behavior.

Build, send, and inspect HTTP requests in the browser. Headers, params, body, auth helpers, response inspector with cookies / headers / raw tabs, HMAC signature panel.

Searchable dictionary of every standard HTTP status code with category color coding, common scenarios, what-to-do guidance, and copy-ready snippets for Express / Next.js / Go / Flask / Axum / curl.

Parse Cookie or Set-Cookie lines, inspect attributes, and build a clean Set-Cookie header visually.

Visually build, audit, and ship hardened Content-Security-Policy headers with nonces, hashes, and ready-to-paste server snippets.

Bidirectional URL parser, builder, and diff tool — protocol, query params, path segments, Punycode, plus mailto / data / magnet decoders.