Developer tools
cURL to Fetch
Convert a cURL request into the browser Fetch API. Nothing you enter leaves your browser.
Your result will appear here.
What this tool does
About the cURL to Fetch
This converter reads curl input and rewrites the same usable information as fetch. It changes the representation, not the meaning of the source data, except where the target format cannot express the same structure.
It is intended for development and debugging workflows where a small, inspectable transformation is faster than setting up a script.
How to use it
- Paste cURL command in the input pane. Use the example button if you want to see the expected syntax.
- Review the input for the structure shown in the example. Then select “Generate Fetch.”
- Inspect the result for warnings or structural differences, then copy it into the destination system.
Practical example
Start with a known input
Try this sample input:
curl -X POST https://api.example.com/users -H 'Content-Type: application/json' -d '{"name":"Avery"}'
Select “Generate Fetch” and compare the result with the source before using it elsewhere. What to know about the result
- URL encoding replaces reserved or unsafe characters with percent-encoded bytes so values can travel safely in a URL component.
- Processing happens in this browser. Your entered text and selected files are not sent to FormatCalc for conversion.
Common questions
Using the cURL to Fetch
Is the cURL to Fetch free to use?
Yes. FormatCalc's cURL to Fetch is free to use with no account required.
Is my data private when I use the cURL to Fetch?
Yes. This tool processes your input locally in your browser. FormatCalc does not upload or store what you enter.
How do I use the cURL to Fetch?
Paste or type your input, select any available options, and choose Generate Fetch. You can then copy the result.
What should I check before using the result?
URL encoding replaces reserved or unsafe characters with percent-encoded bytes so values can travel safely in a URL component. Processing happens in this browser. Your entered text and selected files are not sent to FormatCalc for conversion.