FlatLaf Demo & Theme Editor – CheerpJ + Java 17

FlatLaf – Browser Demo

Java 17 via CheerpJ

Switch between the FlatLaf Demo and Theme Editor, both running unchanged JARs inside the browser via CheerpJ (Java 17).

How to use

1 Start with the Demo to explore FlatLaf look & feel options and components.
2 Switch to the Theme Editor to create or tweak themes. Save them inside the CheerpJ virtual filesystem.
3 Go back to the Demo and load your custom theme using the FlatLaf theme selection options.
Tip: A custom theme called CheerpJ Demo Theme is preloaded and can be selected from the theme list in the Demo.

This page runs the original FlatLaf JARs:
flatlaf-demo-3.7.jar and flatlaf-theme-editor-3.7.jar via cheerpjRunJar on a Java 17 runtime.

Runtime ready