How does this tool handle CORS issues when running the generated fetch()?

CORS (Cross-Origin Resource Sharing) is enforced by web browsers at runtime when making cross-origin requests. cURL executes in terminal environments without browser CORS restrictions. If your target API does not return Access-Control-Allow-Origin headers, you will need a backend proxy or server-side execution.

Does the converter support async/await syntax?

Yes, the generated fetch snippet defaults to modern, readable async/await patterns with try/catch error handling, compatible with modern browsers and Node.js 18+ environments.

cURL to Code Converter

Convert command-line cURL commands into clean JavaScript Fetch, Node.js Axios, Python Requests, and Go HTTP code.

cURL Command

Automatically cleans leading terminal shell prompts ($ or >) and escaped line continuations.

Target Language / Client

Generated JavaScript (fetch) Code

fetch('https://api.example.com/v1/users', {
  method: 'POST',
  headers: {
    'Content-Type': 'application/json',
    'Authorization': 'Bearer eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9...'
  },
  // body: '{"name": "Alice Smith", "role": "engineer"}',
  body: JSON.stringify({
    'name': 'Alice Smith',
    'role': 'engineer'
  })
});

How cURL to JavaScript Fetch Conversion Works & Technical Principles

Convert terminal cURL commands into clean, async/await JavaScript fetch() code directly in your browser. All parsing executes locally with zero network exposure.

Technical Overview: AST Parsing & Fetch RequestInit Mapping

cURL uses command-line flags (-X, -H, -d, -b, -u) to specify HTTP methods, headers, payloads, and authentication. The converter tokenizes shell arguments into an abstract syntax tree and generates modern, idiomatic JavaScript using standard fetch() and RequestInit objects.

How It Works

STEP 01

Input & Configuration

Paste your command copied from terminal history, Postman, or DevTools Network tab (Copy as cURL).

Input & Configuration

STEP 02

Client-Side Processing

The client tokenizer parses flags (-X, -H, --data, -b, -u), decodes URLs, and serializes payloads.

Client-Side Processing

STEP 03

Instant Output & Export

Instantly copy formatted, production-grade async/await fetch() code with modern error handling.

Instant Output

Key Capabilities & Features

Handles Complex Body Formats

Supports raw JSON payloads, form URL-encoded data, multipart/form-data, and GraphQL queries.

Automatic Auth Header Translation

Converts -u username:password into Basic Auth headers and properly maps Bearer tokens and cookies.

100% In-Browser Privacy Guarantee

All conversion logic executes directly in your browser. API keys, secrets, and auth tokens remain strictly local.

DevTools Compatible

Directly accepts 'Copy as cURL (bash)' from Chrome, Firefox, Safari, and Edge developer tools without manual edits.

Technical Standards & RFC Specifications

WHATWG Fetch Standard

Generates code fully compliant with the modern standard WHATWG Fetch API specification

RFC 9110 HTTP Semantics

Adheres to standard HTTP method semantics, header naming, and MIME media types

Frequently Asked Questions

Privacy Guarantee: All computations execute locally within your browser sandbox. No source data, tokens, or files are ever transmitted to any remote server.

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