cURL to Java Converter

Convert cURL commands into clean, modern Java 11+ java.net.http.HttpClient code or OkHttp requests with full header, authentication, and payload support.

At a glance

cURL to Java Converter is a free browser tool that converts cURL commands to modern Java 11+ HttpClient and OkHttp code online. It seamlessly generates OkHttp 4.x / 5.x pipelines ideal for Android and Spring Boot microservices. Automatically wraps JSON payloads in BodyPublishers.ofString or RequestBody.create with UTF-8. All processing is local: nothing is uploaded, and no account is required.

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100% Client-Side In-Browser cURL to Java Converter

Convert cURL commands into clean, modern Java 11+ java.net.http.HttpClient code or Square OkHttp requests with full header, authentication, and payload support. Zero network transmissions, 100% private in browser memory.

Local & Private Instant Conversion
Output Mode:
cURL Command 0 chars
Ready
Auto-evaluates on keystroke
Java Code HttpClient 
// Paste a cURL command on the left to generate Java code...
GET api.example.com 0 headers No Auth
Java 11+ Compatible
Build Tool Dependencies JDK Runtime 
# Java 11+ includes java.net.http in standard JDK runtime
Modern Java 11+ HttpClient

Uses standard java.net.http.HttpClient and HttpRequest.newBuilder() without external libraries.

Square OkHttp Support

Easily export production-ready OkHttp 4.x/5.x request pipelines tailored for Android and Spring Boot microservices.

100% Client-Side Privacy

All command parsing, header tokenization, and Java code generation run strictly in local browser memory.

Why Use This cURL to Java Converter?

Modern Java 11+ HttpClient Support: Builds clean, idiomatic java.net.http.HttpClient requests with HttpRequest.newBuilder() and BodyPublishers.
Square OkHttp Alternative: Seamlessly generate OkHttp 4.x / 5.x pipelines ideal for Android and Spring Boot microservices.
Full Authentication Handling: Automatically converts Basic Auth (-u user:pass) to Base64 and Bearer tokens to Authorization headers.
Smart Body & Content-Type Detection: Automatically wraps JSON payloads in BodyPublishers.ofString or RequestBody.create with UTF-8.
Insecure TLS Bypass Support: Configures custom TrustManager and SSLContext for self-signed certificates when -k is supplied.
100% In-Browser Privacy: All command parsing, header tokenization, and Java generation run strictly inside your local browser memory.

How to Use cURL to Java Converter

1

Paste Your cURL Command

Copy a cURL command from your browser DevTools Network tab or documentation and paste it into the editor.

2

Select Output Mode

Choose between modern Java 11+ java.net.http.HttpClient or the Square OkHttp library.

3

Copy Java Code

Click 'Copy' to copy the generated Java class or download it as a .java file.

Worked example: cURL to Java Converter

Executed entirely inside your local browser memory using modern Web APIs. The engine verifies input syntax, performs deterministic transformation, and exposes instant copy or download options.

Sample CURL Data Source 
sample_payload.curl (Valid format conforming to CURL specification)
Resulting JAVA Output Processed 
converted_result.java (100% client-side)

Technical Specifications & Engine Details

Technical specifications and engine details for cURL to Java Converter
Specification Details
Supported Formats CURL, TEXT, SH → JAVA, TEXT
Execution Mode 100% Client-Side In-Browser (client)
Browser Requirements Requires modern web browser with ECMAScript 6+ and standard DOM Web APIs.
Performance Constraints Client browser memory limit (typically 1–2 GB RAM); processing speed depends on local device CPU.
Maintained by Pragyan Pahadi

100% Client-Side Privacy Guarantee

All cURL parsing and Java code generation occur locally inside your browser memory. Your URLs, headers, and secrets never touch any external server.

Frequently Asked Questions

How do I convert a cURL command into Java code?
Paste your cURL command into the editor. The engine immediately parses HTTP method, headers, parameters, authentication, and body to generate production-ready Java code.
Does this converter use Java 11+ HttpClient or the older HttpURLConnection?
It uses modern Java 11+ java.net.http.HttpClient by default, avoiding the verbose and deprecated HttpURLConnection API.
Can I generate OkHttp code for Android projects?
Yes! Click the 'OkHttp Client' button in the toolbar to switch to Square OkHttp syntax with complete Maven and Gradle dependency snippets.
How does it handle Basic Auth and Bearer tokens in Java?
Bearer tokens are mapped directly to Authorization headers, and Basic Auth credentials are base64-encoded to standard RFC headers.

Methodology

This tool runs entirely in your browser. The example above shows a representative input and the result it produces.

Last updated .

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