cURL to Code

cURL to Code Online Converter (Fetch, Axios, Python, Go)

Instantly transform cURL commands copied from DevTools into clean, executable code for JavaScript, Python, and Go. 100% client-side privacy.

Local syntax parser only; does not send requests to target servers

快速示例：

粘贴 cURL 命令 (100% 本地解析，不向服务器发送任何请求)：

Method: POST

URL: https://api.example.com/v1/users

Headers: 2

Body: 54 bytes

// JavaScript (Fetch API)
async function sendRequest() {
  const response = await fetch("https://api.example.com/v1/users", {
    method: "POST",
    headers: {
      "Content-Type": "application/json",
      "Authorization": "Bearer my-secret-token-xyz"
},
    body: JSON.stringify({"name": "Alice", "role": "developer", "active": true}),
  });

  if (!response.ok) {
    throw new Error(`HTTP error! status: ${response.status}`);
  }

  const data = await response.json();
  console.log(data);
  return data;
}

sendRequest();

🛡️ 100% 浏览器本地解析 · 绝不上报凭证或向目标接口发起网络请求 · 支持断网离线使用

How it works

cURL Parsing Mechanism & Local Privacy Protection

cURL is the universal command-line tool for debugging HTTP requests. Modern browser DevTools (Network tab) make it easy to 'Copy as cURL'.

Many third-party online converters send your cURL command to remote backend servers for parsing, creating serious risks of leaking API keys, bearer tokens, and session cookies.

This converter parses command syntax entirely within your browser memory using an AST-based JavaScript lexer. It operates completely offline, guaranteeing that sensitive credentials never leave your machine.

cURL Command ➔ In-Browser Lexer ➔ JavaScript (Fetch/Axios) | Python (requests) | Go (net/http)

Parameter Reference

cURL Options to Target Code Mapping Reference

Each cURL command option directly corresponds to standard HTTP protocol elements and language client parameters:

cURL Option	Target Code Structure	Behavior & Translation Rule
`-X, --request <METHOD>`	options.method / method	Explicit HTTP verb (GET, POST, PUT, DELETE, PATCH). Defaults to POST if omitted with -d payload.
`-H, --header <HEADER>`	options.headers / headers	Sets custom HTTP headers. Supports chained headers for Content-Type, Authorization, and Accept.
`-d, --data, --data-raw`	options.body / data / json	Request payload. Valid JSON strings are automatically parsed and structured for target frameworks.
`--data-urlencode <DATA>`	URLSearchParams / data	URL-encoded form parameters. Encodes special characters and configures application/x-www-form-urlencoded.
`-u, --user <USER:PASS>`	Authorization: Basic <base64>	HTTP Basic Authentication. Encodes user and password in Base64 on the client side.
`-b, --cookie <STRING>`	Cookie Header	Supplies HTTP Cookie key-value pairs directly mapped to the Cookie request header.
`-A, --user-agent <NAME>`	User-Agent Header	Custom user agent identifier mapped to standard client headers.

Windows PowerShell Pitfalls & Quote Escaping

In Windows PowerShell 5.1 and earlier, 'curl' is an alias for 'Invoke-WebRequest', not the real curl binary. If your terminal throws unexpected errors, call 'curl.exe' directly.

PowerShell parses quotes differently than Unix shells: double quotes inside single quotes are frequently mangled. This converter's lexer includes auto-repair routines for Windows-specific escaping nuances.

Why Does cURL Work in Terminal But Fail with CORS in Browsers?

When running cURL in a terminal, it operates as a native operating system process and is completely exempt from the browser Same-Origin Policy (SOP).

When running generated JavaScript Fetch in a browser console or web page, the browser enforces strict CORS headers ('Access-Control-Allow-Origin'). If the target API lacks CORS headers, the browser will block the response. Running the generated code in Node.js, Python, or Go avoids all CORS limitations.

FAQ

cURL to Code Online Converter (Fetch, Axios, Python, Go) · FAQ

Is it safe to paste production tokens or cookies here?

Yes, 100%. All parsing and code generation execute entirely in your local browser memory. No network traffic is transmitted with your command data.

Does it support Chrome/Firefox 'Copy as cURL' commands?

Yes. It supports line-continuation backslashes, complex quote escapes, --data-raw payloads, and chained -H headers.

Can I run the output code directly?

Yes. Output snippets include correct HTTP methods, headers, and body formatting. Simply paste them into your runtime or terminal.

How does it handle multipart/form-data file uploads?

If your command includes -F or --form, the converter generates FormData structures in JavaScript, files dict in Python, and multipart.Writer in Go.

Why is Content-Length omitted from generated headers?

Modern HTTP client runtimes calculate exact body byte counts automatically. Manually specifying Content-Length frequently causes mismatches or browser rejections.

Can I copy generated code directly to the clipboard?

Yes. Click on the tab for your desired programming language to copy the formatted code snippet with a single click.