API tools

API tools that run locally in your browser.

cURL Command Generator

Build cURL commands from URL, method, headers, and body. Copy-ready curl for any HTTP request.

Convert cURL to JavaScript Fetch

Convert cURL commands to JavaScript fetch() code. Paste curl and get copy-ready fetch syntax.

Convert cURL to Python Requests

Convert cURL commands to Python requests code. Paste curl and get copy-ready Python.

Postman Collection Generator

Generate Postman Collection v2.1 JSON from URL, method, headers, and body. Import directly into Postman.

JSON Schema Validator Online

Validate JSON data against a JSON Schema. Paste instance and schema to see errors instantly.

HTTP Request Builder — Raw & cURL

Assemble a request from method, URL, headers and body, then take it away as a raw HTTP message or as a cURL command ready to paste in a terminal.

API Mock JSON Response Generator

Describe the shape you want and get a JSON response body to point a client at, so front-end work can start before the real endpoint exists.

Webhook Payload Inspector

Paste a webhook body and see it parsed into a readable tree, with the headers and signature fields separated from the event data.