12 tools

HTTP & API Tools

Free browser-based http & api tools with instant results and no account required.

cURL Command Builder

Build a cURL HTTP request command from method, URL, headers, body, redirect, and compression options.

Parse common cURL HTTP options into a normalized request model with explicit unsupported-option reporting.

Convert common HTTP-oriented cURL commands into Python requests code.

Convert common HTTP-oriented cURL commands into JavaScript Fetch API code.

Parse a raw HTTP/1.x request into method, target, version, headers, query, and body metadata.

Convert a raw HTTP/1.x request into a copy-ready cURL command.

Parse request or response header blocks while preserving repeated field names and reporting malformed lines.

Look up HTTP status-code class and registered reason text using the current standards registry snapshot.

Build common HTTP Cache-Control response directives with explicit freshness and revalidation settings.

Build a Content-Security-Policy header from common CSP fetch and navigation directives.

Generate common Cross-Origin Resource Sharing response headers for a known origin and API policy.

Generate a Strict-Transport-Security header with max-age, subdomain, and preload-token controls.