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CURL Command Builder

Build CURL commands for API requests instantly with this free online CURL Command Builder.

Generated CURL Command

Generated CURL command will appear here...

Working With CURL Commands

CURL is one of the most widely used command-line tools for making HTTP requests and testing APIs. Developers often use CURL while debugging authentication systems, testing REST APIs, checking response headers, troubleshooting servers, and reproducing browser requests directly from the terminal.

Writing CURL commands manually can become repetitive when request headers, JSON payloads, authentication tokens, cookies, and custom methods are involved. This builder helps generate properly formatted CURL commands instantly.

The tool is useful for API testing, backend development, debugging frontend requests, automation workflows, server troubleshooting, and sharing reproducible API examples.

How to Use the CURL Command Builder

  1. Select the HTTP request method.
  2. Enter the API or request URL.
  3. Add request headers such as Authorization or Content-Type.
  4. Paste the request body for POST, PUT, or PATCH requests.
  5. Copy the generated CURL command for terminal usage.

Common Use Cases

  • Testing REST APIs directly from the terminal.
  • Debugging authentication and bearer token requests.
  • Reproducing browser API requests manually.
  • Generating reusable API request examples.
  • Working with JSON payloads and custom headers.
  • Debugging CORS, cookies, and server responses.
  • Sharing API examples during development workflows.

Example CURL Command

Generated command:

curl -X POST "https://api.example.com/users" \
  -H "Authorization: Bearer eyJhbGciOi..." \
  -H "Content-Type: application/json" \
  -d '{"name":"Yoryantra","role":"developer"}'

Common CURL Request Parts

  • -X defines the HTTP method such as GET, POST, PUT, PATCH, or DELETE.
  • -H adds request headers such as Authorization or Content-Type.
  • -d sends request body data, commonly used with JSON APIs.
  • URL specifies the API endpoint or resource being requested.

Frequently Asked Questions

What is CURL?

CURL is a command-line tool used to transfer data and make HTTP requests to APIs, servers, and web services.

Why use CURL commands for APIs?

CURL commands help developers test APIs, debug authentication flows, automate requests, reproduce browser traffic, and inspect server responses directly from the terminal.

Does this support custom headers?

Yes. You can include custom request headers such as Authorization, Content-Type, Cookie, Accept, and many others.

Can I generate POST requests with JSON data?

Yes. You can include JSON request bodies and generate POST, PUT, or PATCH CURL commands.

Is CURL generation processed on the server?

No. CURL command generation happens entirely inside your browser.