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NeatUtility

cURL to Code Converter

Web & API100% Client-Side
Ready
CURL
0 lines0 chars
0 B / 976.6 KB
About this tool, examples & FAQ

Convert cURL commands into Python (requests), JavaScript Fetch, Node.js (axios), Go (net/http), or PHP (curl) code with a handwritten local parser — no request is ever executed. Unsupported flags are reported as warnings rather than applied, and the Inspect mode shows the parsed request as structured JSON.

Key facts

Verified capabilities and limits of this utility
Accepted inputcURL command text with method, header, data, auth, cookie, agent, and URL flags
Code targetsJavaScript Fetch, Python requests, Node.js axios, Go net/http, PHP curl, plus a JSON inspect mode
Unsupported flagsUnrecognized or non-translatable flags are ignored and reported with an unsupported-option warning
Max input size1 MB
Execution deadline3 s
Processing locationBrowser-only: the converted request is never executed

How to use

  1. Copy a cURL command (for example from the browser DevTools Network tab or API documentation).
  2. Paste the command into the input editor.
  3. Select your target language: 'JavaScript (fetch)', 'Python (requests)', 'Node.js (axios)', 'Go (net/http)', 'PHP (curl)', or 'Inspect JSON'.
  4. Toggle 'Include Header Comments' to include or omit explanatory target comments.
  5. Click 'Run' to generate the client code.
  6. Use 'Copy' to paste directly into your project codebase.

Examples

Convert a JSON POST to Fetch

Input

curl https://example.test/api -H 'Content-Type: application/json' -d '{"enabled":true,"value":null}'

Example output

// Generated JavaScript (fetch) code from cURL
// Target: POST https://example.test/api

const response = await fetch("https://example.test/api", {
  method: "POST",
  headers: {
    "Content-Type": "application/json",
  },
  body: JSON.stringify({
    "enabled": true,
    "value": null
  }),
});

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

Convert a JSON POST to Python

Input

curl https://example.test/api -H 'Content-Type: application/json' -d '{"enabled":true,"value":null}'

Example output

# Generated Python code from cURL
# Target: POST https://example.test/api

import requests

headers = {
    "Content-Type": "application/json",
}

json_data = {
    "enabled": True,
    "value": None
}

response = requests.post(
    "https://example.test/api",
    headers=headers,
    json=json_data,
)

print(response.status_code)
print(response.text)

Edge cases

Unsupported flags warn instead of applying

Flags with no code equivalent are skipped and listed in an unsupported-option warning, so review warnings before trusting generated output.

TLS flags are recorded but not emitted

Insecure and compressed flags appear in Inspect output, but generators omit them, so TLS verification semantics do not carry into the generated code.

PHP strings use single quotes

The PHP generator emits single-quoted strings, which avoids variable interpolation of dollar signs carried over from the original command.

Shell variables are never expanded

Dollar variables and file references stay literal in the output. No shell evaluation happens, and no referenced file is read.

Multiline commands join continuations first

A backslash at the end of a line joins the next line before parsing, so broken-up commands convert the same as single-line ones.

Fetch output assumes a JSON response

Generated Fetch snippets end with await response.json(): adjust that line for endpoints returning text, binary, or empty bodies.

How it works

  1. Tokenizes the pasted command with a handwritten shell-aware tokenizer honoring single quotes, double quotes, and escapes.
  2. Extracts method, URL, headers, body, basic auth, cookies, and TLS flags into a parsed request model.
  3. Renders the model through the selected language generator with JSON bodies mapped to native literals.
  4. Runs entirely in a Web Worker bounded by the tool deadline; nothing is sent over the network.

Related workflows

Frequently asked questions

Should I choose Python or Fetch output?

Choose Python when your client uses the requests library (JSON bodies become native dicts with True and None), and Fetch when the call lives in browser or Node JavaScript. Both describe the same parsed request; only the target idiom differs.

What happens to Authorization headers and credentials?

Headers are copied into the generated code and basic-auth credentials become a Basic Authorization header. Parsing and generation stay in memory in your browser, but the generated snippet itself contains the secret, so handle it accordingly.

How are JSON versus form bodies converted?

Bodies that parse as JSON map to native structures in each language (Fetch JSON.stringify, Python json=, axios data). Other bodies, including data-urlencode output, carry over as literal strings.

What happens to flags the converter does not support?

They are ignored for code generation and listed in an unsupported-option warning on the result. Inspect mode still shows the parsed core request so you can see what was kept.

Are referenced files read or uploaded?

No. File references stay literal text in the output, no local file is read, and conversion never executes the request or touches the network.

References