cURL To Fetch Converter

Step-by-Step Tutorial

1. Copy cURL: curl -X POST https://api.example.com/data -H "Content-Type: application/json" -d '{"key":"value"}'
2. Paste into converter
3. Get fetch code:
4. fetch('https://api.example.com/data', {
5. method: 'POST',
6. headers: {'Content-Type': 'application/json'},
7. body: JSON.stringify({key: 'value'})
8. }).then(res => res.json())
9. Use in React, Vue, or vanilla JavaScript

Real-World Use Case

A React developer adds weather API integration. API docs provide cURL with API key header. Converting manually risks mistakes in fetch options structure. They paste cURL into converter, get clean fetch() with proper headers object and error handling. The generated code works immediately in their React component. This saves 10 minutes of fetch() documentation lookup and prevents common mistakes like forgetting JSON.stringify() for request body or incorrectly structuring headers object.

Best Practices

• Add error handling: .catch(err => console.error(err))
• Check response.ok before parsing: if (!response.ok) throw error
• Use async/await for cleaner code readability
• Add timeout with AbortController for slow APIs
• Store API keys in environment variables, not code

Common Mistakes to Avoid

• Forgetting JSON.stringify(): Body must be string for fetch()
• Not checking response.ok: fetch() doesn't reject on HTTP errors
• Missing Content-Type: Server may reject request without proper header
• No error handling: Always add .catch() for network errors

Privacy and Data Handling

Conversion happens client-side. cURL commands stay in browser. When converting commands with API keys, replace with environment variables in final code. Never expose secrets in frontend JavaScript—use backend proxy for sensitive API calls.