Version 26.0 Available

Java on your phone.
No JDK required.

Write, compile, and run Java programs completely offline. Experience a desktop-grade IDE in the palm of your hand.

Download Download armeabi-v7a

Not sure which one? Or need x86_64?

All Downloads (GitHub Releases)
Free & Open Source 100% Offline Android 5.0+
Editor
public class Main {
public static void main(String[] args) {
System.out.println("Hello from JEM!");
}
}
Terminal
> Hello from JEM!
> Process finished with exit code 0

Everything you need to code on the go.

Designed for students, educators, and developers who want a reliable Java environment anywhere.

Lightning Fast

Write and run Java code instantly without any setup or cumbersome IDE installations. Pre-packaged compiler gets you going right away.

Completely Offline

No internet? No problem. The entire Java compilation and execution process happens locally on your Android device.

Online Community

Discover, share, and collaborate with other learners in the integrated online community. Upload your programs and explore thousands of others.

Local Storage

Easily manage and save multiple projects. Create folders, backup your files, and keep your code organized securely on your phone.

Syntax Highlighting

A beautiful editor tailored for Java with full syntax highlighting, automatic line numbering, and customizable themes.

Dynamic Themes

Built-in elegant dark and light modes that can automatically sync with your system preferences for a comfortable coding session.