Developer Tools4 min read•Updated 2026-09-04
How to Convert cURL Commands to JavaScript Fetch and Axios
Transform complex cURL requests with authentication headers and JSON bodies into modern browser or Node.js code.
MX
MultiToolX Technical Team
Developer Productivity Engineering
Key Takeaways
- cURL uses flags like -X (method), -H (headers), and -d (body data).
- Native Fetch in modern JavaScript (browser & Node.js 18+) handles JSON requests using JSON.stringify() in body.
- MultiToolX automatically translates cURL flags into modern async/await Fetch syntax.
1. How cURL Flags Map to Fetch Options
cURL -X POST maps to method: 'POST'.
cURL -H "Content-Type: application/json" maps to headers: { 'Content-Type': 'application/json' }.
cURL -d '{"id": 1}' maps to body: JSON.stringify({ id: 1 }).
Frequently Asked Questions
Does native Fetch require installing external npm packages?
No, fetch() is built into all modern web browsers and Node.js versions 18 and newer.
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