cURL to JavaScript Fetch Converter
Paste any cURL command and get the equivalent JavaScript fetch() code.
Ready.
About cURL to JavaScript Fetch Converter
cURL is the universal command for making HTTP requests from the terminal. But when building web applications, you need the equivalent JavaScript code. Converting cURL options to fetch() arguments manually is error-prone — this tool does it instantly.
Common cURL to fetch() Mappings
-X POST → method: 'POST' | -H 'Content-Type: application/json' → headers: {'Content-Type': 'application/json'} | -d '{"key":"value"}' → body: JSON.stringify({key: "value"}) | --user user:pass → headers: {Authorization: 'Basic ' + btoa('user:pass')} | -k (skip TLS) → not supported in browser fetch
When to Use fetch() vs Axios
fetch(): Built into all modern browsers and Node.js 18+. No dependencies. Requires manual JSON parsing (response.json()) and has no automatic error throwing for non-2xx status codes. Axios: Third-party library. Automatically parses JSON, throws on non-2xx responses, has interceptors, and supports request cancellation. For simple requests, fetch is fine; for complex API clients, Axios or ky add value.
async/await Pattern
The generated code uses async/await — the modern, readable way to handle promises introduced in ES2017. For environments that don't support async/await (rare in 2024), use .then() chaining instead.
Error Handling with fetch()
Unlike Axios, fetch() only rejects the promise on network errors (no connectivity). HTTP error status codes like 404 or 500 still resolve as successful promises. Always check response.ok or response.status to handle API errors correctly.