cURL to fetch Converter

Use this cURL to fetch Converter to turn common cURL requests into JavaScript fetch calls. It is useful when you copy a request from browser devtools, API documentation, Postman, a terminal command, or a support ticket and want to reproduce it in frontend or Node.js code.

The converter extracts the request URL, HTTP method, headers, and body where possible, then produces a readable fetch snippet that can be copied into a script, test, browser console, or debugging note.

What This Tool Does

This tool helps convert everyday cURL commands into JavaScript:

• Convert cURL commands into browser-friendly fetch code
• Preserve the request URL and HTTP method
• Carry headers into the fetch options object
• Include request body data when present
• Generate code that is easier to edit than a long shell command

It is intended for common API debugging workflows, not every advanced cURL flag.

Why cURL to fetch Conversion Matters

cURL is excellent for command-line API testing, but application code usually needs a JavaScript request. Manually translating a request can be annoying because headers, quoting, body data, and methods must all land in the correct place.

This is especially common when browser devtools exports a request as cURL, but the next step is to reproduce it in a frontend bug report, integration test, serverless function, or quick Node.js script.

Common Use Cases

• Turning a devtools "Copy as cURL" request into JavaScript
• Reproducing an API issue in a browser console
• Creating a quick integration test from a known request
• Converting documentation examples into app code
• Inspecting headers and body payloads in a clearer format
• Sharing API debugging snippets with teammates

Example

cURL Input

curl -X POST https://api.example.com/users \
  -H "Content-Type: application/json" \
  -H "Authorization: Bearer token" \
  -d '{"name":"Alice"}'

fetch Output

fetch("https://api.example.com/users", {
  method: "POST",
  headers: {
    "Content-Type": "application/json",
    "Authorization": "Bearer token"
  },
  body: "{\"name\":\"Alice\"}"
});

Notes for Developers

• Review generated code before using it with real credentials
• Sensitive headers copied from devtools should not be committed
• Some cURL flags may need manual adjustment after conversion
• Request bodies are preserved as text so you can decide how to parse or format them
• Browser fetch may still be affected by CORS even when cURL works

Frequently Asked Questions

Can fetch do everything cURL can do?

No. cURL has many transport-level options that do not have direct browser fetch equivalents.

Why does the converted request fail in the browser?

The most common reason is CORS. A request can work in cURL but still be blocked by browser security rules.

Should I paste production tokens into this tool?

Avoid pasting real secrets unless necessary. If you do, remove them before sharing or committing generated code.

Related Tools

• URL Parser & Query Builder
• JSON Formatter / Minifier
• Line Tools
• JWT Encoder / Decoder

Final Thoughts

Moving from cURL to JavaScript is a frequent API debugging step. This converter gives you a clean starting point so you can focus on the request behavior instead of manually reshaping headers, methods, and payloads.