cURL → Java

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cURL command

Java

Convert cURL commands to Java HttpClient, Spring RestClient or WebClient code.

How to use the cURL to Java converter

Paste a curl command (from API docs, Postman or your browser's Copy as cURL), or click Sample.
Choose the Java client you use; the code updates instantly.
Copy it into your project. Imports are included.

Which client?

Java 11+ HttpClient (java.net.http): built into the JDK, no dependencies. Good for plain Java, scripts and libraries.
Spring RestClient: the modern, fluent synchronous client in Spring Framework 6.1+ (Spring Boot 3.2+), the successor to RestTemplate.
Spring WebClient: reactive and non-blocking, for WebFlux applications. The sample blocks at the end for simplicity.

What's translated

Headers, JSON and raw bodies (as text blocks when they span lines), and the HTTP method.
-u Basic auth, -F multipart uploads, -L redirects and --max-time timeouts.
Headers HttpClient refuses to set, like Host and Content-Length, are left out with a note.

Frequently asked questions

Which cURL options are understood?

The ones that shape a request: -X, -H, -d and its variants (--data-raw, --data-binary, --data-urlencode, --json), -F, -u, -b, -A, -e, -G, -I, -L, -k and --max-time. Output options like -s or -o are ignored, and anything else is listed under the result.

Can I paste "Copy as cURL" from the browser?

Yes, in bash or Windows format: $'…' quoting and \, ^ or ` line continuations are handled. Remove session cookies and tokens you don't want in your code.

Is my command uploaded or run?

No. It's parsed and converted in your browser; nothing is sent.

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