cURL to Java Converter

What is cURL to Java?

cURL to Java parses a curl command's method, URL, headers and body, and generates equivalent Java code using the built-in java.net.http.HttpClient — useful when porting a curl example from API documentation into a Java application.

How to use cURL to Java

1. Paste a curl command into the Input box.
2. Click Convert.
3. Copy the generated Java code.

Features

• Uses java.net.http.HttpClient — no extra dependency.
• Supports method, headers, body and HTTP Basic auth.
• Never runs the request itself.
• 100% client-side — your command never leaves your browser.

Example

This curl command:

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

becomes:

HttpClient client = HttpClient.newHttpClient();

HttpRequest request = HttpRequest.newBuilder()
    .uri(URI.create("https://api.example.com/users"))
    .header("Content-Type", "application/json")
    .method("POST", HttpRequest.BodyPublishers.ofString("{\"name\":\"Ada\"}"))
    .build();

HttpResponse<String> response = client.send(request, HttpResponse.BodyHandlers.ofString());
System.out.println(response.statusCode());
System.out.println(response.body());

Tips for Java developers

• Add import java.net.URI; and import java.net.http.*; at the top of your file — the generated code assumes these are already imported.
• client.send(...) blocks the calling thread. For non-blocking code, use client.sendAsync(request, HttpResponse.BodyHandlers.ofString()), which returns a CompletableFuture.
• HttpClient throws an IOException on network failure but does not throw on a non-2xx status code — always check response.statusCode() yourself.
• Reuse a single HttpClient instance across requests rather than creating a new one each time — it manages its own connection pool.

Is cURL to Java Converter safe?

Yes. Parsing your curl command and generating the java.net.http.HttpClient code both happen locally in your browser — the command you paste, including any headers or credentials, is never uploaded to our servers, and the generated code only runs when you compile and execute it yourself.

Frequently Asked Questions

Related tools

• cURL Generator
• cURL to JavaScript
• cURL to Python