cURL to Fetch Converter

Name: cURL to Fetch Converter
Author: EverydayTools

Transform API cURL requests into fetch code.

Runs fully in your browser. No data leaves your device.

Curl command

Multi-line curl with backslashes is supported. Converts after you stop typing.

fetch() code

Result will appear here.

How this converter handles curl flags

This tool parses common curl options and maps them to browser-friendly fetch(). It handles headers, method, JSON bodies, form data, and cookies. Some curl-only runtime flags are intentionally surfaced as warnings so your generated code stays explicit and production-safe.

For payload and URL debugging, pair this with JSON Formatter, JSON Validator, URL Parser, Query String Parser, and URL Encoder/Decoder.

Privacy-first and trust details

Runs fully in your browser; no upload and no server-side conversion.
Safe for sensitive requests in local/dev workflows, but avoid sharing production secrets.
Unsupported curl flags are shown as warnings so you can manually adjust generated code.
For privacy and data handling details, see Privacy Policy.

For auth and request-debug workflows, also try JWT Decoder, Base64 Encoder/Decoder, Hash Generator, String Escaper, and JSON Schema Generator.

By Muhammad Abdullah Rauf · Founder, EverydayTools.proUpdated 2026

Workflow guides

Step-by-step chains that connect related tools for common tasks.

Port a documentation cURL example to production JavaScript

Paste the cURL command from the API docs (including any -H, -d, and -X flags) into the input field.
Copy the fetch() output and paste it into your JavaScript file or browser console to verify the request succeeds.
Build and test the full endpoint URL with URL Builder to confirm query parameters are properly encoded before adding it to the fetch call.

Frequently Asked Questions

Why convert cURL to fetch()?

cURL is the universal way to share API examples in documentation, but browser JavaScript uses the fetch() API. Converting cURL commands lets you test APIs directly in your browser code, React/Vue components, or Node.js without installing curl. This tool handles all flags: -H headers, -d body, -X method, --data-urlencode, and --compressed.

How are cURL headers converted to fetch?

Each -H 'Header: Value' flag becomes an entry in the fetch headers object. Authorization headers, Content-Type, Accept, and custom headers are all mapped. The tool preserves exact header names and values including multi-value headers.

Does the converter handle JSON bodies?

Yes. A cURL -d '{"key":"value"}' or --data-raw flag is placed in the fetch body property as a string. If the Content-Type is application/json, the output wraps the body in JSON.stringify() so you can pass an object directly rather than a raw string.

What cURL flags does the converter not support?

Client certificate flags (-E, --cert), proxy settings (--proxy), and low-level socket options don't map to fetch(). File upload with @filename is converted to a FormData placeholder you fill in manually. Basic auth (-u user:pass) is converted to an Authorization: Basic header with the base64-encoded credentials.

Part of Developer Tools

More free tools for the same workflow.

URL Builder

Free URL builder — add a base URL, append query parameters, auto-encode values, and copy the complete URL string. Perfect for API testing, UTM links, and affiliate tracking. No signup.

URL Encoder & Decoder

Free URL encoder decoder for query values and full URLs—encodeURIComponent & encodeURI. Percent-encode or decode instantly in your browser; never uploaded.