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Curl Command Builder

Build curl commands from URL, method, headers, and body. Copy the generated command.

Generated curl command will appear here...

cURL Command Builder – Generate API Testing Commands

cURL (Client URL) is the most widely used command-line tool for making HTTP requests. It's essential for API testing, debugging, and automation. However, constructing complex cURL commands manually can be error-prone and time-consuming. The cURL Command Builder by ToolfolioHub simplifies this process by providing a visual interface to build cURL commands from URL, method, headers, and body—then instantly copy the generated command.

Whether you're testing REST APIs, debugging webhooks, or automating HTTP requests, this tool generates accurate, properly formatted cURL commands in seconds.

What is cURL?

cURL is a command-line tool for transferring data with URLs. It supports:

  • All HTTP methods (GET, POST, PUT, DELETE, PATCH, etc.)
  • Custom headers (authentication, content-type, etc.)
  • Request bodies (JSON, form data, etc.)
  • File uploads and downloads
  • Multiple protocols (HTTP, HTTPS, FTP, etc.)

cURL commands are portable, scriptable, and work on all operating systems, making them ideal for API testing, CI/CD pipelines, and automation.

Key Features & Benefits

1. Support for All HTTP Methods

Select from GET, POST, PUT, PATCH, DELETE, HEAD, and OPTIONS. The tool automatically includes the `-X` flag and request body when appropriate.

2. Flexible Header Input

Enter headers as JSON object or line-by-line format. Supports authentication tokens, content types, custom headers, and more.

3. JSON Body Support

Add request bodies for POST, PUT, and PATCH requests. The tool properly escapes and formats the body for safe command-line execution.

4. Properly Escaped Output

Generated commands use proper escaping for special characters, ensuring they work correctly when pasted into terminals.

How to Use the cURL Builder

  1. Select Method: Choose HTTP method from dropdown.
  2. Enter URL: Paste or type the API endpoint URL.
  3. Add Headers (Optional): Enter headers as JSON or line-by-line format.
  4. Add Body (Optional): For POST/PUT/PATCH, enter JSON or text body.
  5. Build Command: Click "Build Curl Command" to generate.
  6. Copy & Use: Copy the command and paste into terminal.

Typical Use-Cases

  • API Testing: Quickly test endpoints during development
  • Debugging: Reproduce API issues for troubleshooting
  • Documentation: Generate example commands for API docs
  • Automation: Create cURL commands for scripts and CI/CD

Conclusion

The cURL Command Builder accelerates API testing and debugging by generating accurate cURL commands instantly. It's an essential tool for developers working with REST APIs, webhooks, and HTTP services.