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Free cURL to Code Converter

Convert cURL commands to JavaScript Fetch, Axios, Python Requests, Go, PHP, and Rust code instantly with zero latency.

Tanbir Ahamed·Founder of ToolWise · Software Engineer

Published August 2026

100% Client-Side cURL Transpiler

Try Presets:

Paste cURL Command

Generated JavaScript (Fetch)

const response = await fetch('https://api.example.com/v1/users', {
  method: 'POST',
  headers: {
      "Content-Type": "application/json",
      "Authorization": "Bearer my_secret_token_123"
  },
  body: JSON.stringify({"name": "Tanbir Ahamed", "role": "Developer", "active": true}),
});
const data = await response.json();
console.log(data);

How to Use

1Paste your raw cURL command into the input box or click one of the sample presets.
2Select your desired programming language (JavaScript, Python, Go, PHP, or Rust).
3Inspect the generated code and click Copy Code to paste it into your application.

Features

✓Translates cURL commands to 7 languages and HTTP libraries
✓Auto-detects JSON payloads, URL-encoded data, and headers
✓Modern ES6+ async/await & Pythonic code formatting
✓One-click sample commands and copy button
✓100% private in-browser tool with zero server uploads

Comprehensive Guide & Reference

Comprehensive Guide & Reference: cURL to Multi-Language Code Translation

cURL (Client URL) is the de facto industry standard for command-line HTTP communication. This guide outlines syntax mapping, header structures, and production API integration patterns.

1. Anatomy of a cURL Command

A standard cURL API call consists of an HTTP method, target URL endpoint, request headers, and an optional payload body:

curl -X POST "https://api.example.com/v1/resource" \

-H "Authorization: Bearer <TOKEN>" \

-H "Content-Type: application/json" \

-d '{"query":"data"}'

2. Key cURL Flags & Parameter Reference

Flag	Long Name	Description & Language Mapping
-X	--request	Defines the HTTP verb (GET, POST, PUT, DELETE, PATCH).
-H	--header	Passes custom HTTP headers (e.g. Authorization, Content-Type, Accept).
-d	--data / --data-raw	Sends HTTP POST/PUT payload data. Automatically parsed into JSON or form bodies.
-u	--user	HTTP Basic Authentication credentials (username:password), converted to Base64 headers.

3. Production Best Practices for API Clients

Environment Variables: Never hardcode API keys or Bearer tokens directly in client code. Store them in .env.local or secure secrets managers.
Error Handling: Always check HTTP status codes (e.g., response.ok in Fetch or try/except in Python) before parsing JSON response streams.
Timeouts: Configure explicit request timeouts (e.g., 10 seconds) to prevent hanging connections in distributed backend microservices.

Real example

Worked example: a cURL command as Fetch

Input: curl https://api.example.com/users -H "Authorization: Bearer tk_123"
Output: →fetch("https://api.example.com/users", { ↵ headers: { ↵ "Authorization": "Bearer tk_123" ↵ } ↵ }) — the URL and every -H header mapped 1:1

Switch the target to Axios, Python Requests, Go, or PHP and the same command converts — method, headers, and body all carry over into idiomatic syntax for that stack.

Worked example: a POST with a JSON body

Input: curl -X POST https://api.example.com/orders -H "Content-Type: application/json" -d '{"sku":"TW-1","qty":2}'
Output: →Python Requests: requests.post("https://api.example.com/orders", headers={"Content-Type": "application/json"}, json={"sku": "TW-1", "qty": 2}) — the -d payload becomes json=

Passing json= instead of data= also sets the Content-Type for you, so the converted code is idiomatic rather than a literal translation.

Privacy & data handling

This tool runs entirely in your browser. What you enter is processed on your own device using JavaScript and WebAssembly — it is not uploaded to our servers, and there is no account, no signup and no per-use limit. Read our privacy policy.

Frequently Asked Questions

How does the cURL to Code Converter work?

It parses command-line cURL arguments (-X, -H, -d, --data-raw, -u, -F) in your browser and automatically generates idiomatic, production-ready code for JavaScript (Fetch & Axios), Python (Requests & HTTPX), Go, PHP (cURL), and Rust (Reqwest) with zero server requests.

Are my API keys and Bearer tokens secure?

Yes, 100%. The conversion runs entirely client-side in your web browser JavaScript execution context. No network requests, API keys, or payload bytes are ever transmitted to any external server.

Which HTTP methods and payload formats are supported?

The converter supports GET, POST, PUT, PATCH, DELETE, HEAD, and OPTIONS requests with JSON bodies, standard form-urlencoded data, raw text streams, and custom request headers.

How do I copy a cURL command from Chrome or Firefox DevTools?

Open DevTools (F12) -> Navigate to the Network tab -> Trigger the HTTP request -> Right-click the network entry -> Select Copy -> Copy as cURL (bash). Then paste it directly into this tool.

Does this tool support async/await in JavaScript and Python?

Yes. JavaScript Fetch and Axios snippets use modern ES6+ async/await syntax, while Python outputs both synchronous requests and modern httpx client structures.

How are multi-line cURL commands with backslashes handled?

The parser automatically strips backslashes (\) and line continuations, normalizing multi-line terminal commands into a clean single command stream before AST tokenization.

Can I generate Go code with net/http from cURL?

Yes. Selecting Go produces a complete main.go package with http.NewRequest(), header mapping, payload stream reader, and response body closure handling.

What is the difference between JavaScript Fetch and Axios outputs?

Fetch is native to modern browsers and Node.js 18+ requiring no external npm dependencies. Axios provides automatic JSON data serialization and backward compatibility with older Node runtimes.

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Free cURL to Code Converter

Convert cURL commands to JavaScript Fetch, Axios, Python Requests, Go, PHP, and Rust code instantly with zero latency.

Tanbir Ahamed·Founder of ToolWise · Software Engineer

Published August 2026

100% Client-Side cURL Transpiler

Try Presets:

Paste cURL Command

Generated JavaScript (Fetch)

const response = await fetch('https://api.example.com/v1/users', {
  method: 'POST',
  headers: {
      "Content-Type": "application/json",
      "Authorization": "Bearer my_secret_token_123"
  },
  body: JSON.stringify({"name": "Tanbir Ahamed", "role": "Developer", "active": true}),
});
const data = await response.json();
console.log(data);

How to Use

1Paste your raw cURL command into the input box or click one of the sample presets.
2Select your desired programming language (JavaScript, Python, Go, PHP, or Rust).
3Inspect the generated code and click Copy Code to paste it into your application.

Features

✓Translates cURL commands to 7 languages and HTTP libraries
✓Auto-detects JSON payloads, URL-encoded data, and headers
✓Modern ES6+ async/await & Pythonic code formatting
✓One-click sample commands and copy button
✓100% private in-browser tool with zero server uploads

Comprehensive Guide & Reference

Comprehensive Guide & Reference: cURL to Multi-Language Code Translation

cURL (Client URL) is the de facto industry standard for command-line HTTP communication. This guide outlines syntax mapping, header structures, and production API integration patterns.

1. Anatomy of a cURL Command

A standard cURL API call consists of an HTTP method, target URL endpoint, request headers, and an optional payload body:

curl -X POST "https://api.example.com/v1/resource" \

-H "Authorization: Bearer <TOKEN>" \

-H "Content-Type: application/json" \

-d '{"query":"data"}'

2. Key cURL Flags & Parameter Reference

Flag	Long Name	Description & Language Mapping
-X	--request	Defines the HTTP verb (GET, POST, PUT, DELETE, PATCH).
-H	--header	Passes custom HTTP headers (e.g. Authorization, Content-Type, Accept).
-d	--data / --data-raw	Sends HTTP POST/PUT payload data. Automatically parsed into JSON or form bodies.
-u	--user	HTTP Basic Authentication credentials (username:password), converted to Base64 headers.

3. Production Best Practices for API Clients

Environment Variables: Never hardcode API keys or Bearer tokens directly in client code. Store them in .env.local or secure secrets managers.
Error Handling: Always check HTTP status codes (e.g., response.ok in Fetch or try/except in Python) before parsing JSON response streams.
Timeouts: Configure explicit request timeouts (e.g., 10 seconds) to prevent hanging connections in distributed backend microservices.

Real example

Worked example: a cURL command as Fetch

Input: curl https://api.example.com/users -H "Authorization: Bearer tk_123"
Output: →fetch("https://api.example.com/users", { ↵ headers: { ↵ "Authorization": "Bearer tk_123" ↵ } ↵ }) — the URL and every -H header mapped 1:1

Switch the target to Axios, Python Requests, Go, or PHP and the same command converts — method, headers, and body all carry over into idiomatic syntax for that stack.

Worked example: a POST with a JSON body

Input: curl -X POST https://api.example.com/orders -H "Content-Type: application/json" -d '{"sku":"TW-1","qty":2}'
Output: →Python Requests: requests.post("https://api.example.com/orders", headers={"Content-Type": "application/json"}, json={"sku": "TW-1", "qty": 2}) — the -d payload becomes json=

Passing json= instead of data= also sets the Content-Type for you, so the converted code is idiomatic rather than a literal translation.

Privacy & data handling

Frequently Asked Questions

How does the cURL to Code Converter work?

Are my API keys and Bearer tokens secure?

Yes, 100%. The conversion runs entirely client-side in your web browser JavaScript execution context. No network requests, API keys, or payload bytes are ever transmitted to any external server.

Which HTTP methods and payload formats are supported?

The converter supports GET, POST, PUT, PATCH, DELETE, HEAD, and OPTIONS requests with JSON bodies, standard form-urlencoded data, raw text streams, and custom request headers.

How do I copy a cURL command from Chrome or Firefox DevTools?

Open DevTools (F12) -> Navigate to the Network tab -> Trigger the HTTP request -> Right-click the network entry -> Select Copy -> Copy as cURL (bash). Then paste it directly into this tool.

Does this tool support async/await in JavaScript and Python?

Yes. JavaScript Fetch and Axios snippets use modern ES6+ async/await syntax, while Python outputs both synchronous requests and modern httpx client structures.

How are multi-line cURL commands with backslashes handled?

The parser automatically strips backslashes (\) and line continuations, normalizing multi-line terminal commands into a clean single command stream before AST tokenization.

Can I generate Go code with net/http from cURL?

Yes. Selecting Go produces a complete main.go package with http.NewRequest(), header mapping, payload stream reader, and response body closure handling.

What is the difference between JavaScript Fetch and Axios outputs?

Fetch is native to modern browsers and Node.js 18+ requiring no external npm dependencies. Axios provides automatic JSON data serialization and backward compatibility with older Node runtimes.

Free cURL to Code Converter

How to Use

Features

Comprehensive Guide & Reference: cURL to Multi-Language Code Translation

1. Anatomy of a cURL Command

2. Key cURL Flags & Parameter Reference

3. Production Best Practices for API Clients

Real example

Worked example: a cURL command as Fetch

Worked example: a POST with a JSON body

Privacy & data handling

Frequently Asked Questions

Related Tools

Related Guides

Free cURL to Code Converter

How to Use

Features

Comprehensive Guide & Reference: cURL to Multi-Language Code Translation

1. Anatomy of a cURL Command

2. Key cURL Flags & Parameter Reference

3. Production Best Practices for API Clients

Real example

Worked example: a cURL command as Fetch

Worked example: a POST with a JSON body

Privacy & data handling

Frequently Asked Questions

Related Tools

Related Guides

Free cURL to Code Converter

Interactive Tool Workspace

How to Use

Features

1. Anatomy of a cURL Command

2. Key cURL Flags & Parameter Reference

3. Production Best Practices for API Clients

Real example

Worked example: a cURL command as Fetch

Worked example: a POST with a JSON body

Privacy & data handling

Frequently Asked Questions

Related Tools

Related Guides

Free cURL to Code Converter

Interactive Tool Workspace

How to Use

Features

1. Anatomy of a cURL Command

2. Key cURL Flags & Parameter Reference

3. Production Best Practices for API Clients

Real example

Worked example: a cURL command as Fetch

Worked example: a POST with a JSON body

Privacy & data handling

Frequently Asked Questions

Related Tools

Related Guides