Free dev tool · runs in your browser

Curl Command Builder — and instant fetch + Python code

Build any HTTP request visually. Get a clean curl command plus equivalent JavaScript fetch and Python requests code side-by-side. Nothing is sent anywhere. Everything runs locally in your browser.

✓ 100% client-side✓ No signup✓ curl + fetch + Python
Add a Content-Type header if your API needs one. JSON bodies auto-format on generate.
Fill in the URL to generate a command.

Nothing is sent — this is a code generator, not an HTTP client.

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What this tool does

Enter your URL, method, headers, query params, and body once — get equivalent code in three formats:

Why not just use Postman?

Postman is great for interactive testing. This tool is faster when you just need a snippet to paste into your code, a bug report, or a CI script. There's no account, no sync, no telemetry, and no request ever leaves your browser.

Common uses

Privacy

Every generation happens in your browser using vanilla JavaScript. Nothing is stored, logged, or transmitted. Bearer tokens, Basic auth credentials, JSON bodies — none of it leaves your machine. Even so, if you're generating a command with a live production token, treat this window like any other sensitive session and close it when done.

Frequently asked questions

What is a curl command?+
curl is a command-line tool for making HTTP requests. Engineers use it to test APIs, debug endpoints, and reproduce browser requests from the terminal. A curl command specifies the URL, HTTP method, headers, and body of a request. This tool builds well-formatted curl commands for any request shape you need.
How do I convert a curl command to fetch?+
Fill in the URL, method, headers, and body in this tool's form. The JavaScript fetch tab shows the equivalent code, including headers, body serialization, and content-type handling. Paste the result into your JavaScript or TypeScript project.
How do I convert curl to Python requests?+
Enter your request details in the form. The Python requests tab shows the equivalent code using the requests library — including headers, JSON body, and query parameters. Copy the snippet into any Python file that has requests installed.
Does this tool send my request?+
No. Everything runs entirely in your browser. This tool never contacts your endpoint, never stores your request, and doesn't send anything over the network. It only generates the code you would run yourself.
Can I use this tool to test authenticated APIs?+
Yes. Add your authorization header (Bearer, Basic, custom API key) in the headers section. The tool includes it in the generated curl, fetch, and Python code. Since the tool runs entirely in-browser, your token never leaves your machine — but avoid using this tool to build commands with tokens in shared or public contexts.