Fetch Api Curl Converter

Fast, accurate and free online fetch api curl converter tool running directly in your browser.

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Client-Side Processing

100% Free

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Instructions

1

Enter data
Enter content, paste text or load a file from disk.
2

Click the button
The tool will immediately process your data in the browser.
3

Get the result
Copy the finished text or save the file to your device.

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                                                }

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Fetch API to cURL converter - terminal command from JS code

Reverse-engineering a Fetch request into a cURL command is useful when: you test API in the terminal, create documentation, debug requests or want to run the same query from the server. The tool parses JavaScript code (async/await or .then()) and generates a complete cURL command with flags.

Fetch to cURL converter fetch to curl JavaScript to curl command fetch API debugging

What is parsed from the code Fetch

URL (first argument of fetch()). method from the → -X METHOD option. headers from the → -H "Header: value" option. body → -d or --data-binary. credentials: "include" → -b (cookie forwarding). mode: "no-cors" → --no-cors (informational) flag. signal(AbortController) → ignored in cURL.

Generated cURL flags

Basic: -X POST -H "Content-Type: application/json" -d '{"key":"val"}'. Compression: --compressed (when Accept-Encoding: gzip). SSL skip (dev): -k or --insecure. Verbose (debug): -v. Redirect follow: -L. Cookie jar: -c cookies.txt -b cookies.txt. Output to file: -o response.json.

Handling body types

JSON (body: JSON.stringify({})): automatically adds -H "Content-Type: application/json" if missing. FormData: generates -F "field=value". URLSearchParams: --data-urlencode or -d with query string. Binary blob: --data-binary with restriction.

Development Applications

Copy requests from Chrome DevTools (Copy as Fetch) → paste here → get cURL for documentation. Replay the client request on the server side for debugging. Share a command with another developer without sharing the JS code. Integration with tools such as Postman, Insomnia (cURL import).

FAQ

Does the converter support all variants of Fetch syntax?

The tool supports: fetch(url), fetch(url, options), const r = await fetch(...), .then(r=>r.json()). Does not support: dynamically generated URLs by variables (static parsing), custom Request object (new Request(url, opts)).

How to copy request from Chrome as Fetch?

Chrome DevTools → Network → click request → right click → Copy → "Copy as fetch". Paste the result into the tool. Alternatively, "Copy as cURL" - then you don't need conversion.

Does cURL work on Windows?

Yes – cURL is available on Windows 10+ (built-in PowerShell and CMD). For older users: install curl.exe (curl.se/windows). Quotation marks: On Windows CMD, use double quotes instead of single quotes.

What is the cURL command to retrieve JSON from the API?

curl -s -H "Accept: application/json" https://api.example.com/data | jq. Flag -s: silent (no progressbar). jq: JSON formatting. Writing to file: curl -o data.json URL. With auth: curl -H "Authorization: Bearer TOKEN" URL.

How to add cURL to CI/CD pipeline?

cURL is available in most Docker images (ubuntu, alpine + apt/apk). Health check example: curl --fail --max-time 5 https://app.example.com/health. If it returns the code 4xx/5xx or timeout – docker/GitHub Actions treats the step as a failure.

Related tools: cURL to Fetch API converter, test JSON API generator and JSON validator.