URL & API

These tools cover the checks that come up again and again in API development. You can encode and decode URLs, send a real request with your own headers and body from the REST API tester, build the equivalent curl command, and look up what an HTTP status code or a curl exit code means and what to do about it.

URL Encoder/Decoder

Encode and decode URL

REST API Tester

Testing tool for REST API.

HTTP Status Code List

Complete list of HTTP status codes (1xx-5xx) with meanings, common causes, and fixes for developers. Includes a lookup tool — enter a code number to see details instantly.

curl Exit Code List: Look Up Any Code (1-99), Meaning & Fix

Search the full list of curl exit codes (1-99) by number — see what each one means, common causes, and the exact fix. A developer reference for CI/CD, cron jobs, and shell scripts.

curl Command Generator

Specify the HTTP method, URL, headers, body, and authentication method in the form to generate a ready-to-run curl command you can copy and paste. No request is actually sent, so CORS restrictions never apply.