cURL to JavaScript Converter (fetch)

Paste a cURL command from API docs or your browser's network tab and get equivalent JavaScript code using fetch. Your tokens and URLs stay in your browser.

Free No sign-up Runs in your browser
Input cURL
Output JavaScript

How to use the cURL to JavaScript

  1. Paste your cURL command into the input box.
  2. The output updates automatically as you type.
  3. Copy the JavaScript or download it as a file.

How it works

Supports -X, -H, -d / --data-raw / --data-binary, --data-urlencode, --json, -u, -F, -A, -b, -G and multi-line commands with backslash continuations.

Private by design

Developer data is often sensitive: API responses, tokens, customer records, internal configs. This cURL to JavaScript processes everything locally in your browser tab. There is no server round-trip, no logging and no storage of your input.

Frequently asked questions

Is this cURL to JavaScript free?

Yes. This cURL to JavaScript is completely free to use with no sign-up, no limits and no ads inside the tool.

Is my data uploaded to a server?

No. The cURL to JavaScript runs entirely in your browser using JavaScript. Nothing you paste is sent to DevT Pro or any other server.

Which cURL options are supported?

Supports -X, -H, -d / --data-raw / --data-binary, --data-urlencode, --json, -u, -F, -A, -b, -G and multi-line commands with backslash continuations.

Can I use the cURL to JavaScript offline?

Yes. cURL to JavaScript is also built into DevT Pro, a native app for Mac, Windows, iPad and Linux with 120+ developer tools that work fully offline. It is a $5.99 one-time purchase with no subscription.

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DevT Pro

cURL to JavaScript, offline, plus 120+ developer tools.

Converters, formatters, encoders, validators, code generators and more in one native app. No internet, no account, no uploads.

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