How It Works

cURL Converter is a 100% client-side tool that transforms cURL commands into production-ready code in 14+ programming languages. Everything happens in your browser - no data is ever sent to our servers.

The Conversion Process

1. Parse cURL Command

When you paste a cURL command, our parser analyzes it to extract:

URL - The target endpoint
HTTP Method - GET, POST, PUT, DELETE, etc.
Headers - Content-Type, Authorization, custom headers
Request Body - JSON data, form data, or raw content
Authentication - Bearer tokens, Basic auth, API keys
Query Parameters - URL parameters

2. Generate Language-Specific Code

Once parsed, the converter generates idiomatic code for your chosen language:

# Input cURL
curl -X POST https://api.example.com/users \
  -H "Content-Type: application/json" \
  -d '{"name":"John"}'

# Output Python (Requests)
import requests

url = "https://api.example.com/users"
headers = {"Content-Type": "application/json"}
data = {"name": "John"}

response = requests.post(url, headers=headers, json=data)

3. Multiple Library Variants

For each language, we support multiple popular HTTP libraries:

Python: Requests, HTTP Client
JavaScript: Fetch API, XMLHttpRequest
Node.js: HTTP, Axios, Got
Java: HttpClient, OkHttp, HttpURLConnection
And many more…

Privacy & Security

Client-Side Processing

All parsing and code generation happens entirely in your browser:

✅ Your cURL commands never leave your computer
✅ No server-side processing or logging
✅ No data collection or tracking
✅ Works offline after initial page load
✅ Safe for sensitive API keys and tokens

Open Source

The converter is built on curlconverter - an open-source project with:

🔍 Transparent code review
🛡️ Community-vetted security
📝 Regular updates and improvements

Technical Stack

Parser: Custom cURL command parser
Generators: Language-specific code templates
Runtime: 100% client-side JavaScript
Framework: Astro (static site generation)

Supported cURL Flags

We support the most common cURL flags:

Flag	Description	Example
`-X, --request`	HTTP method	`-X POST`
`-H, --header`	Custom header	`-H "Authorization: Bearer token"`
`-d, --data`	Request body	`-d '{"key":"value"}'`
`-F, --form`	Form data	`-F "[email protected]"`
`-u, --user`	Basic auth	`-u username:password`
`-b, --cookie`	Cookie	`-b "session=abc123"`
`-A, --user-agent`	User agent	`-A "MyApp/1.0"`

Limitations

Some advanced cURL flags may not be supported
Complex shell variables are not evaluated
File paths are converted to placeholders

Try It Yourself

Open the converter to see it in action, or use RequestBin for advanced features like testing with real endpoints.

Related docs: Headers & JSON | Python | JavaScript