What CURL options are supported?

Our converter handles headers (-H), request body (-d/--data), HTTP methods (-X), authentication (-u), and most common CURL options.

Does it handle authentication?

Yes! The converter handles Basic Auth (-u) and Bearer tokens, converting them to appropriate fetch headers.

Can it convert POST requests?

Absolutely! POST requests with JSON or form data are converted to fetch with proper headers and body formatting.

What about async/await?

The generated fetch code uses async/await syntax, which is the modern and recommended way to work with promises in JavaScript.

CURL to Fetch Converter – Convert CURL Online (Free Tool)

Free online CURL to Fetch Converter tool to convert CURL commands to JavaScript fetch API code. Transform your CURL requests into browser-compatible fetch calls instantly. Perfect for web developers working with APIs and migrating backend code to frontend.

Example Output

Idiomatic async/await fetch call — drop straight into any modern JS/TS file.

Input

curl -X POST https://api.example.com/users -H "Content-Type: application/json" -d '{"name":"Alice"}'

Output

await fetch("https://api.example.com/users", { method: "POST", headers: { "Content-Type": "application/json" }, body: JSON.stringify({ name: "Alice" }) });

What is CURL to Fetch Converter?

cURL to Fetch turns a cURL command (the format docs and Chrome's "Copy as cURL" produce) into equivalent modern JavaScript fetch() code with async/await. Saves the manual work of mapping -X/-H/-d flags and quoting payloads correctly when porting examples from Postman, docs, or a colleague's terminal.

Why use this tool?

Works on desktop, tablet, and mobile in any modern browser
Stable behavior across visits — no surprise version drift
Your data stays private — all processing happens locally in the browser
Built for developer workflows: copy-friendly output, syntax-aware highlighting where useful
Works with very large inputs (multi-megabyte JSON, long regex patterns, big tables)

How to use

Paste a cURL command (single-line or multi-line with backslash continuations)
Click Convert — equivalent fetch() code appears below
Copy the snippet into your JavaScript/TypeScript file
Headers, method, body, query params, and basic auth are all preserved

Examples

Port API docs to your client

Copy the cURL example from the docs, paste here, get ready-to-paste fetch() — start coding against the API faster.

Convert Chrome DevTools output

Right-click any request in the Network tab → Copy as cURL → paste here. Now you have the same request expressed as fetch() for use in your code.

Common use cases

Porting cURL examples from API documentation into JS code
Replicating Chrome DevTools requests programmatically
Sharing reproducible API calls with frontend teammates who don't use cURL
Speed-bootstrapping API client code without manual flag mapping

Troubleshooting

Multi-line cURL with backslash continuations failed to parse.: Either keep the backslashes (the parser handles them) or collapse to one line. Make sure there's no trailing space after the backslash on any line.
Some flags not converted.: Coverage focuses on the common flags: -X, -H, -d/--data, -u (basic auth), -k (ignore SSL). Less common ones like -F (form), --cookie, --resolve aren't mapped — adjust the output manually.

Frequently Asked Questions

Converting CURL to fetch allows you to use the same HTTP request in browser-based JavaScript applications. Fetch is the modern standard for making HTTP requests in JavaScript.

Try these related tools

JSON Formatter Base64 Encoder JWT Decoder JSON to YAML Converter

Explore more Developer Tools

Discover other free, privacy-first tools in Developer Tools.

All Developer Tools Browse all tools