cURL to JavaScript Fetch Converter
Translate cURL commands from API documentation or browser developer tools into readable JavaScript fetch() calls, including methods, headers, JSON bodies, and multipart form data.
Server-assisted conversion
The pasted command is sent to the DevToolsLabs conversion endpoint for parsing. Remove API keys, cookies, tokens, and other secrets before using this tool. Commands are processed for the response and are not intentionally stored.
How to use this tool
- Remove authorization tokens, cookies, API keys, and other secrets from the command.
- Paste a valid command beginning with curl into the input editor.
- Review the generated fetch() call and restore secrets through environment variables in your own code.
- Copy the converted JavaScript.
Example Usage
curl -X POST https://api.example.com/users -H "Content-Type: application/json" -d '{"name":"Ada"}'fetch('https://api.example.com/users', { method: 'POST', headers: { 'Content-Type': 'application/json' }, body: JSON.stringify({ name: 'Ada' }) });When to use this tool
- Translating API documentation examples into frontend code.
- Converting a sanitized request copied from a browser network panel.
- Learning how cURL flags map to the Fetch API.
Frequently Asked Questions
Should I paste a production token?
No. Remove credentials, session cookies, API keys, and personal data before submitting a command. Add them back securely in your own application.
Does it support POST bodies and headers?
Yes. The converter handles common methods, headers, JSON bodies, and multipart form flags. Always verify generated code before production use.
Why use fetch() instead of XMLHttpRequest?
Fetch is the modern promise-based browser API and is also available in current Node.js releases.
Built by Developers, For Developers
DevToolsLabs is maintained as an open-source collection of focused developer utilities. Most transformations run locally in your browser; tools that require a network service disclose the destination beside the tool. Each utility is built around a concrete development workflow and can be reviewed in the public source repository.