Why OkHttp and not HttpURLConnection?

OkHttp is the de-facto standard: connection pooling, HTTP/2, timeouts, and a fluent Request builder. HttpURLConnection is verbose and hard to get right for POST bodies.

Does it handle multipart uploads?

Yes. -F name=@file becomes RequestBody.create(new File(...), MediaType.parse(...)) inside a MultipartBody.Builder, with the content type preserved when provided.

What about --insecure?

We intentionally do not emit a trust-all TrustManager — that's a foot-gun for production code. A comment points to where you'd wire one in for local dev.

Is my curl sent anywhere?

No. Parsing and code generation happen entirely in your browser.

cURL converter · Java

cURL to Java

Paste a curl command and get a compilable OkHttp snippet. We wire -X into .method(...), map -F files to MultipartBody.addFormDataPart, forward --max-time to callTimeout, and translate -x proxy://host:port into an InetSocketAddress proxy.

InputcURL command

1 secret

MethodPOST·Headers2·Body46 B· Chars 187

OutputJVM · OkHttp(modern JVM)

import okhttp3.MediaType;
import okhttp3.OkHttpClient;
import okhttp3.Request;
import okhttp3.RequestBody;
import okhttp3.Response;

public class Main {
  public static void main(String[] args) throws Exception {
    OkHttpClient.Builder clientBuilder = new OkHttpClient.Builder();
    clientBuilder.followRedirects(false).followSslRedirects(false);
    OkHttpClient client = clientBuilder.build();
    RequestBody body = RequestBody.create("{\"to\":\"+15551234567\",\"body\":\"Hello from curl\"}", MediaType.parse("application/json"));
    Request.Builder rb = new Request.Builder().url("https://api.example.com/v1/messages");
    rb.method("POST", body);
    rb.header("Authorization", "Bearer sk_test_123");
    rb.header("Content-Type", "application/json");
    try (Response response = client.newCall(rb.build()).execute()) {
      System.out.println(response.body().string());
    }
  }
}

Inspect

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Common questions

Why OkHttp and not HttpURLConnection?: OkHttp is the de-facto standard: connection pooling, HTTP/2, timeouts, and a fluent Request builder. HttpURLConnection is verbose and hard to get right for POST bodies.
Does it handle multipart uploads?: Yes. -F name=@file becomes RequestBody.create(new File(...), MediaType.parse(...)) inside a MultipartBody.Builder, with the content type preserved when provided.
What about --insecure?: We intentionally do not emit a trust-all TrustManager — that's a foot-gun for production code. A comment points to where you'd wire one in for local dev.
Is my curl sent anywhere?: No. Parsing and code generation happen entirely in your browser.

Also convert cURL to

All guides →

Same parser, same idiomatic output — swap the target language whenever your stack changes. Every hub carries its own reference guides for methods, payloads, and auth.

cURL to JavaScript

fetch

cURL to Node.js

native fetch

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requests

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net/http

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ext-curl

cURL to Ruby

net/http