cURL to fetch
Convert common cURL commands into readable JavaScript fetch examples for frontend work.
What is cURL to fetch?
Translate a copied cURL command into a JavaScript fetch starting point. A command that succeeds in a terminal may fail in a browser because of CORS, cookies or forbidden headers.
How to use cURL to fetch?
Step 1
Paste a cURL command into the tool.
Step 2
Review the generated fetch example and any conversion notes.
Step 3
Copy the result into your frontend or test harness.
Example input / output
A POST with Content-Type: application/json and --data '{"name":"Ada"}' should retain the HTTP method, header and exact body. Review credential handling before embedding it in frontend code.
Example input
curl -X POST https://api.example.com/orders -H "Content-Type: application/json" -H "Authorization: Bearer token" -d '{"amount":125,"currency":"EUR"}'Check the result
- Advanced flags and shell features may only be converted on a best-effort basis.
- Multipart uploads and cookie jars often need manual follow-up edits.
Practical developer examples
Compare request semantics
Check inferred method, body and repeated headers against the original. Browser fetch cannot set every header that curl can send.
Remove shell-only assumptions
Environment variables, command substitutions, uploaded files and shell expansions are not evaluated here. Replace them with explicit redacted fixtures before conversion.
Common developer use cases
The parser handles common cURL patterns, not every flag or shell dialect. Generated code is not executed and cannot establish that an endpoint accepts the request.
Common issues
FAQ
Why does fetch fail when curl works?
Browsers enforce CORS and credential policies. Compare the preflight, origin and response headers rather than only the body.
Does the tool expand $TOKEN?
No. It parses text and does not access your shell environment.