cURL to Code Converter

A cURL to code converter parses a cURL command and generates equivalent code in your target programming language — preserving the HTTP method, URL, headers, authentication, query params, and request body. To convert cURL to code online: paste your cURL command in the input above, select your target language (JavaScript, Python, Node.js, Go, PHP, Ruby, and more), and the ready-to-run code snippet appears instantly. Useful when copying a request from browser DevTools or Postman and needing it in a specific language. All conversion runs locally in your browser — no commands are sent to a server.

What does this tool do?

This converter extracts the request method, URL, headers, authentication, and payload from a cURL command, then generates code you can drop into your project. Everything runs locally in your browser.

Supported features

• HTTP methods: GET, POST, PUT, PATCH, DELETE, and HEAD.
• Headers, query parameters, and body payloads.
• JSON, form-encoded, and multipart form payload detection.
• Basic auth support and custom authorization headers.
• Multiple languages and frameworks with copy/download.

Tip

Multipart file uploads and complex shell scripts may require manual tweaks after conversion.

Understanding cURL: The Universal API Testing Tool

cURL (Client URL) is a command-line tool for transferring data using various network protocols. It's the de facto standard for testing APIs, debugging HTTP requests, and documenting API endpoints. Developers use cURL because it's pre-installed on most systems (Linux, macOS, Windows 10+), works with any API, and provides complete control over requests.

Why Convert cURL to Code?

While cURL is perfect for quick API testing, production applications need code in their native language. Converting cURL commands to code saves time by automating the translation of request structure, headers, authentication, and payloads into your target language. Instead of manually rewriting a complex API call from documentation or browser DevTools, paste the cURL command and get ready-to-run code in seconds.

Common Sources of cURL Commands

Source	How to Get cURL	Use Case
Browser DevTools	Chrome/Firefox: Network tab → Right-click request → Copy → Copy as cURL	Capture actual requests from websites, including all headers and cookies
API Documentation	Copy example cURL commands from docs (Stripe, Twilio, GitHub, etc.)	Implement API endpoints documented with cURL examples
Postman	Code button → cURL	Convert Postman requests to production code
Terminal/Manual	Write cURL commands for custom API testing	Test APIs before implementing, document API usage

What the Converter Parses

The converter analyzes your cURL command and extracts:

• HTTP Method: -X GET, -X POST, -X PUT, -X PATCH, -X DELETE, -X HEAD (defaults to GET if omitted)
• URL: Endpoint with protocol, domain, path, and query parameters
• Headers: -H "Header-Name: value" for Content-Type, Authorization, User-Agent, custom headers
• Authentication: -u username:password (Basic Auth), Authorization: Bearer token, API keys in headers
• Request Body: -d, --data, --data-raw for JSON, form data, or raw payloads
• Query Parameters: Parsed from URL (?key=value&another=value)
• Flags: -k (insecure/skip SSL), -L (follow redirects), -v (verbose), --compressed (gzip)

How to Use This Converter: Step-by-Step

Step 1: Get Your cURL Command

From Browser DevTools (Recommended):

1. Open your browser's Developer Tools (F12 or Cmd+Option+I on Mac)
2. Go to the Network tab
3. Perform the action on the website (login, submit form, load data)
4. Find the request in the Network log (filter by XHR/Fetch for API calls)
5. Right-click the request → Copy → Copy as cURL

From API Documentation:

1. Find the endpoint you want to implement
2. Copy the cURL example (usually provided in "Shell" or "cURL" tab)
3. Replace placeholder values (API keys, IDs) with your actual credentials

Step 2: Paste and Configure

1. Paste the cURL command into the input textarea (or click "Paste" button)
2. Select target language: JavaScript, Node.js, Python, Go, Java, PHP, Ruby, or C#
3. Select framework: Options change based on language (Fetch, Axios for JavaScript; Requests for Python; etc.)
4. Configure options:
   • Auto-convert: Generates code as you type (recommended)
   • Trim input: Removes extra whitespace and line breaks
   • Use async/await: Generates async code instead of callbacks (JavaScript/Node.js)
   • Include error handling: Adds try-catch blocks and status checks
   • Timeout: Sets request timeout in seconds (default: 10)
   • Parse response: Auto-detects JSON vs text, or force a specific type

Step 3: Generate and Use Code

1. Click "Convert to Code" (or auto-conversion generates it instantly)
2. Review the generated code in the output panel
3. Click "Copy" to copy to clipboard, or "Download" to save as a file
4. Paste into your project and adjust as needed (environment variables, imports, etc.)
5. Test the code to verify it works with your API

Language and Framework Options Explained

JavaScript (Browser)

Frameworks: Fetch API, XMLHttpRequest, Axios (browser)

• Fetch API: Modern standard, built into all browsers since 2015. Supports promises and async/await. Best for new projects.
• XMLHttpRequest: Legacy API, still used in older codebases. More verbose, callback-based.
• Axios (browser): Popular third-party library, simpler syntax than Fetch, automatic JSON parsing, better error handling.

Best for: Frontend web applications, browser extensions, client-side API calls.

Node.js (Server-Side JavaScript)

Frameworks: Axios, node-fetch, got, request (deprecated), native http/https

• Axios: Most popular, works in Node.js and browsers, clean API, wide adoption.
• node-fetch: Brings browser Fetch API to Node.js, minimal and lightweight.
• got: Feature-rich alternative with retry logic, hooks, and stream support.
• Native http/https: No dependencies, but verbose and low-level.

Best for: Backend services, APIs, serverless functions, CLI tools.

Python

Frameworks: requests, http.client, urllib3

• requests: The standard, with simple syntax: requests.get(), requests.post(). Handles sessions, cookies, auth automatically.
• http.client: Built-in, no dependencies, but low-level and verbose.
• urllib3: Advanced features like connection pooling, retry logic, used under the hood by requests.

Best for: Scripts, data pipelines, automation, web scraping, backend services.

Go

Frameworks: net/http (standard library), resty, go-resty

• net/http: Built-in, no dependencies, full-featured but verbose.
• resty: Simpler syntax, chainable methods, inspired by Ruby rest-client.

Best for: High-performance services, microservices, command-line tools.

Java

Frameworks: HttpURLConnection, OkHttp, Apache HttpClient

• HttpURLConnection: Built-in, no dependencies, basic functionality.
• OkHttp: Modern, efficient, supports HTTP/2, connection pooling, widely used in Android.
• Apache HttpClient: Mature, feature-rich, but more complex API.

Best for: Enterprise applications, Android apps, Spring Boot services.

PHP

Frameworks: cURL extension, Guzzle, file_get_contents

• cURL extension: Low-level, full control, universally available.
• Guzzle: Modern HTTP client, clean API, popular in Laravel and modern PHP.
• file_get_contents: Simple for GET requests, but limited for complex scenarios.

Best for: WordPress plugins, Laravel apps, PHP backend services.

Ruby

Frameworks: Net::HTTP, RestClient, HTTParty, Faraday

• Net::HTTP: Built-in standard library, verbose syntax.
• RestClient: Simple, expressive syntax, good for quick scripts.
• HTTParty: Clean DSL, easy to use, popular in Rails apps.
• Faraday: Middleware-based, highly customizable, used by major gems.

Best for: Rails applications, Ruby scripts, automation tools.

C#

Frameworks: HttpClient, WebClient (deprecated), RestSharp

• HttpClient: Modern standard, async/await support, recommended for all new projects.
• WebClient: Legacy API, deprecated in .NET Core, avoid for new code.
• RestSharp: Third-party library, simpler API than HttpClient, good for REST APIs.

Best for: .NET applications, ASP.NET services, Windows desktop apps.

Real-World Conversion Examples

Example 1: Simple GET Request

cURL Command:

curl https://api.github.com/users/octocat

Generated JavaScript (Fetch):

fetch('https://api.github.com/users/octocat')
  .then(response => response.json())
  .then(data => console.log(data))
  .catch(error => console.error('Error:', error));

Generated Python (requests):

import requests

response = requests.get('https://api.github.com/users/octocat')
data = response.json()
print(data)

Example 2: POST with JSON Body

cURL Command:

curl -X POST https://api.example.com/users \
  -H "Content-Type: application/json" \
  -d '{"name": "John Doe", "email": "john@example.com"}'

Generated JavaScript (Axios):

const axios = require('axios');

axios.post('https://api.example.com/users', {
  name: 'John Doe',
  email: 'john@example.com'
}, {
  headers: {
    'Content-Type': 'application/json'
  }
})
.then(response => console.log(response.data))
.catch(error => console.error('Error:', error));

Example 3: Bearer Token Authentication

cURL Command:

curl https://api.example.com/protected \
  -H "Authorization: Bearer eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9..."

Generated Python (requests):

import requests

headers = {
    'Authorization': 'Bearer eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9...'
}

response = requests.get('https://api.example.com/protected', headers=headers)
print(response.json())

Example 4: Form Data Upload

cURL Command:

curl -X POST https://api.example.com/upload \
  -F "file=@photo.jpg" \
  -F "description=My photo"

Generated Node.js (Axios with FormData):

const axios = require('axios');
const FormData = require('form-data');
const fs = require('fs');

const form = new FormData();
form.append('file', fs.createReadStream('photo.jpg'));
form.append('description', 'My photo');

axios.post('https://api.example.com/upload', form, {
  headers: form.getHeaders()
})
.then(response => console.log(response.data))
.catch(error => console.error('Error:', error));

Common Use Cases and Workflows

1. Capturing Website API Calls for Scraping/Automation

Scenario: You want to automate interactions with a website that doesn't have a public API.

Workflow:

1. Open the website in your browser with DevTools Network tab open
2. Perform the action (search, login, submit form)
3. Find the XHR/Fetch request that contains the data you need
4. Right-click → Copy as cURL (includes all cookies, headers, auth)
5. Paste into this converter, select Python or Node.js
6. Add the generated code to your scraping/automation script
7. Replace hard-coded cookies with dynamic session management

Result: Functional API call code that replicates browser behavior, bypassing the need for Selenium or Puppeteer.

2. Implementing Third-Party API Integrations

Scenario: API documentation provides cURL examples, and you need to integrate into your app.

Workflow:

1. Copy cURL command from API docs (Stripe, Twilio, SendGrid, etc.)
2. Replace example API keys with your actual credentials
3. Paste into converter, select your project's language
4. Copy generated code into your application
5. Move API keys to environment variables (never hard-code)
6. Add error handling for specific API error codes
7. Test with sample data before production use

Result: Production-ready API integration code in minutes, not hours of manual translation.

3. Debugging API Issues by Testing Manually

Scenario: API call is failing in your app, but you're not sure if it's the code or the API.

Workflow:

1. Extract the API call details from your code (URL, headers, body)
2. Convert to cURL command and run in terminal to test API directly
3. If cURL works, issue is in your code; convert working cURL to code
4. Compare generated code to your existing code to find the difference
5. Common issues: missing headers, wrong Content-Type, incorrect JSON formatting

Result: Isolate whether the problem is code-side or API-side, fix faster.

4. Rapid Prototyping and Testing

Scenario: Quickly test an API endpoint before committing to full implementation.

Workflow:

1. Write a simple cURL command to test the endpoint
2. Run in terminal to verify response
3. Once confirmed working, convert to your language
4. Integrate into your prototype or proof-of-concept

Result: Validate API behavior before investing time in full integration.

5. Converting Postman Collections to Code

Scenario: Your team uses Postman for API testing, but you need production code.

Workflow:

1. Open request in Postman
2. Click "Code" button (right sidebar)
3. Select "cURL" from the dropdown
4. Copy cURL command
5. Paste into this converter, select target language
6. Generate code for each endpoint in your collection
7. Organize into API client modules in your project

Result: Convert entire Postman collections to production code systematically.

Best Practices for Using Generated Code

• Never hard-code API keys: Replace keys/tokens with environment variables (process.env.API_KEY, os.getenv('API_KEY'), etc.).
• Add comprehensive error handling: While the converter adds basic try-catch, customize for specific API error codes (401, 429, 500).
• Set appropriate timeouts: Default 10 seconds may be too short for slow APIs or too long for fast ones. Adjust based on expected response times.
• Validate inputs: Don't trust user input in API requests. Sanitize and validate before sending.
• Handle rate limiting: Many APIs have rate limits. Implement retry logic with exponential backoff for 429 responses.
• Use HTTPS only: Never send credentials or sensitive data over HTTP. The converter preserves the protocol from cURL, so verify it's https://.
• Log requests for debugging: In development, log request URLs, headers (excluding auth), and response status codes.
• Test with mock data first: Before hitting production APIs, test with mock servers or sandbox endpoints.
• Cache responses when appropriate: For data that doesn't change frequently, implement caching to reduce API calls.
• Handle pagination: If the API returns paginated results, the converter won't automatically add pagination logic—you'll need to implement loops.
• Update dependencies: Ensure you install required libraries (axios, requests, etc.) via npm, pip, or your package manager.
• Review generated code: Always review before using in production. The converter handles 95% of cases, but edge cases may need manual adjustment.

Troubleshooting Common Conversion Issues

Advanced Features and Options

Auto-Convert

Enabled by default. Automatically generates code as you type or paste cURL commands. Useful for quickly comparing different language outputs. Disable if working with very long commands to avoid performance issues.

Trim Input

Enabled by default. Removes leading/trailing whitespace and collapses multi-line commands into proper format. Helpful when pasting from terminal history or documentation that includes extra whitespace.

Async/Await vs Promises/Callbacks

Async/await enabled by default for JavaScript/Node.js. Modern syntax, easier to read and maintain. Disable to generate promise-based (.then/.catch) code for older projects or specific style preferences. Python always uses standard synchronous code; for async Python, manually convert using aiohttp or httpx.

Error Handling

Enabled by default. Wraps requests in try-catch blocks (or equivalent), checks HTTP status codes, and logs errors. Disable if you prefer to handle errors manually or need minimal code. For production, always expand error handling to cover specific API error codes.

Timeout Configuration

Default: 10 seconds. Prevents requests from hanging indefinitely. Adjust based on API behavior: fast APIs (social media, public data) can use 5 seconds; slow APIs (reports, large data processing) may need 30-60 seconds. Note: Timeout implementation varies by library—some timeout after connection, some after full response.

Response Parsing

Auto (default): Detects Content-Type header and parses JSON automatically. JSON: Forces JSON parsing, throws error if response isn't valid JSON. Text: Returns raw text without parsing. Useful for non-JSON APIs (XML, CSV, plain text).

Privacy and Security

All conversion happens locally in your browser. Your cURL commands, which often contain sensitive data (API keys, tokens, passwords), never leave your device. No server receives your commands. The tool uses JavaScript to parse cURL syntax and generate code entirely client-side.

Security Recommendations

• Remove credentials before sharing: If you share generated code (GitHub, Stack Overflow, team chat), replace API keys with placeholders like "YOUR_API_KEY".
• Use environment variables: Never commit code with hard-coded keys to version control.
• Rotate exposed keys immediately: If you accidentally expose an API key, revoke and regenerate it instantly.
• Clear browser history: If you pasted sensitive cURL commands, they may be in browser history/cache. Clear if concerned.
• Audit generated code: Always review generated code for security issues before deploying to production.

Frequently Asked Questions