Java Code Translator

Translate code.
One command.

A CLI tool that translates Java source code to JavaScript or Python. Native binary, zero dependencies, memory-capped runtime.

↓ Download Try the demo

Java → JavaScript or Python

Demo

Live translation

Paste Java code, pick a target language, hit Run or Ctrl+Enter.

Java input

public class Hello {
    public static void main(String[] args) {
        String name = "World";
        int count = 5;
        for (int i = 0; i < count; i++) {
            System.out.println("Hello, " + name + "!");
        }
    }
}

← hit Run first

Features

Why Syncher?

Native, fast, offline. No cloud, no API keys.

Native binary

Compiled with GraalVM Native Image. No JVM startup — runs in milliseconds.

Memory-capped

Max heap 256 MB, new generation 64 MB. Translation can never consume your system resources.

Language detection

The Scorer analyses every line and returns the language with the highest syntax score.

Zero dependencies

One binary. Copy it into PATH and go. No Node or Maven runtime required.

Runtime Finder

Automatically locates Node.js and Python in PATH, and warns you when a runtime is missing.

Clean output

Cleaner normalises indentation, strips trailing spaces and removes empty blocks.

Command Line Reference Guide

Commands

All available Syncher commands.

syncher translate <file> --from java --to <lang> translate Translates a Java file into the target language.

syncher detect <file> analysis Detects the file's programming language from its syntax.

syncher runtimes info Lists the runtimes (Node.js, Python) found in the PATH.

syncher --version info Displays the current version of Syncher.

syncher --help help Displays help with all commands and examples.

Translate code.One command.