cURL to Fetch Converter

cURL to Fetch Converter

Convert cURL commands to JavaScript Fetch API code instantly with proper error handling, JSON support, and authentication. Perfect for API integration, web development, and code migration with comprehensive parsing and format conversion.

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Quick Presets
Common cURL commands for quick conversion
Input
Paste your cURL command to convert to JavaScript Fetch API
How it works: Parses the cURL command to extract the HTTP method, URL, headers, and request body. Converts each cURL flag (-X, -H, -d, --data, etc.) to the equivalent JavaScript Fetch API syntax with proper async/await and error handling.

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What is Curl to Fetch Converter?

The Curl to Fetch Converter transforms curl command-line requests into equivalent JavaScript fetch() API calls. It parses the curl command, extracts the URL, HTTP method, headers, and body, and generates a fetch() call with the same parameters. All processing happens in the browser.

How does Curl to Fetch Converter work?

This tool uses a curl parser to extract the URL, method (-X), headers (-H), data (-d), and other options from a curl command. It maps these to a fetch() call with the corresponding options object.

Key Features

  • Converts curl to fetch() API calls
  • Extracts URL, method, headers, and body
  • Supports GET, POST, PUT, DELETE, PATCH
  • Handles JSON and form data
  • Copy fetch code to clipboard
  • Error messages for unsupported options
  • Maps -X, -H, -d, and -F flags to fetch options
  • Real-time conversion

Common Use Cases

When and why you might need this tool

  • Migrating API calls to JavaScript

    Convert curl commands from API documentation to fetch() calls for use in frontend code.

  • Testing API endpoints in browser

    Convert a curl command to fetch() for testing in the browser console.

  • Building client SDKs

    Convert curl examples to JavaScript code for client library documentation.

  • Learning the fetch API

    See how curl options map to fetch() parameters for educational purposes.

How to Use This Tool

Step-by-step guide to get the best results
1

Paste a curl command

Enter a curl command in the input area.

2

Convert

Click Convert. The tool generates the equivalent fetch() code.

3

Copy the code

Copy the JavaScript code for use in your project.

Pro Tips

  • 1

    The tool supports -X for method, -H for headers, and -d for data.

  • 2

    JSON data is automatically parsed and stringified in the fetch body.

  • 3

    Review the output to ensure headers and body match your expectations.

  • 4

    For complex curl commands, some options may need manual adjustment.

Frequently Asked Questions

What curl options are supported?

curl to fetch converter supports -X for method, -H for headers, -d for data or body, --data, --header, and the URL.

Is my data sent to a server?

No. All parsing and conversion happens in your browser. Nothing is transmitted.

Can it handle multipart form data?

The tool handles JSON and URL-encoded form data. Multipart form data requires manual adjustment.

What HTTP methods are supported?

GET, POST, PUT, DELETE, and PATCH.

Does it generate async/await code?

Yes. The output uses the modern async/await syntax with fetch().

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