I Was Tired of Manually Porting cURL to Java — So I Built a Tool to Do It for Me

Let’s be real for a second. Every backend developer knows this specific feeling of defeat.

You’re debugging an API. You spend 15 minutes in the terminal tweaking a cURL request until it finally returns a 200 OK. You feel great.

Then, you switch over to your IDE (probably IntelliJ or Eclipse), look at your Spring Boot project, and think:

"Great. Now I have to rewrite this entire thing in Java."

You have to manually map the headers. You have to escape the JSON quotes in the body string. You have to double-check the Auth token format. It’s not "hard" engineering work—it’s just tedious, repetitive grunt work. And somehow, despite having done it 1,000 times, you still miss a semicolon or a quote, and the request fails.

That frustration is exactly why I spent my weekend building this:

👉 cURL to Java Converter

The Problem: It’s Not Hard, It’s Just Wasted Time

In a real microservices environment, APIs don't live in isolation. Our workflow usually looks something like this:

Debug an external API using cURL or grab a request from the logs.



Copy that request.



Rewrite it into a WebClient or RestTemplate builder.



Realize you forgot to escape the double quotes in the JSON payload.



Fix it.



Re-test.

This is "glue work." It doesn't add value to the product; it just slows down the development cycle. I realized I didn't want a complex code generator that spits out 50 lines of boilerplate classes. I just wanted something that respects the Copy -> Paste -> Done flow.

So, I Built a Solution

I created a lightweight tool that does one thing and does it well: It turns raw cURL commands into clean, production-ready Java code.

You can check it out here: https://toolshref.com/curl-to-java-converter/

What It Actually Generates

I didn't want to support just one ancient library. The tool instantly converts cURL into:

Spring Boot WebClient (The modern standard)



Spring RestTemplate (For legacy maintenance)



Java 11+ HttpClient (Native Java, no dependencies)

The best part? There is no login, no ads, and no backend calls. The conversion logic runs entirely in your browser via JavaScript. If you paste a cURL command with an API key, it stays on your machine.

A Real Example

Here is the kind of meaningful difference this makes in a workflow.

The Input (cURL):

curl -X POST https://api.example.com/users \

-H "Authorization: Bearer MY_SECRET_TOKEN" \

-H "Content-Type: application/json" \

-d '{"name":"John","role":"admin"}'

WebClient webClient = WebClient.builder()

.baseUrl("https://api.example.com")

.defaultHeader(HttpHeaders.AUTHORIZATION, "Bearer MY_SECRET_TOKEN")

.build();

String response = webClient.post()

.uri("/users")

.bodyValue("{\"name\":\"John\",\"role\":\"admin\"}")

.retrieve()

.bodyToMono(String.class)

.block();

It handles the headers, method selection, and that annoying string escaping for you. It produces code that looks like something a human actually wrote, which you can immediately commit.

Why I’m Sharing This

Not every tool needs to be a VC-backed startup or a massive SaaS platform. Sometimes, software is just about removing friction.

I built this to make my own dev life a little calmer and to stop wasting brain cycles on syntax translation. If you work with Spring Boot, build microservices, or just find yourself copying cURL commands from Postman logs often, this might save you a few minutes every day.

And honestly? If it saves you 5 minutes of frustration just once, it’s done its job.

Give it a try next time you're stuck converting requests: 🚀 Try the cURL to Java Converter