Instead of converting, run your .jar file on a PC emulator, record the gameplay, or transfer saves. Converting to VXP often results in laggy performance or missing features (like Bluetooth multiplayer).

Common scenarios:

While smartphones rule the world, there is a nostalgic charm in using feature phones and smartwatches that run the MRE platform. By converting .jar files to .vxp, you unlock a massive library of classic games and utilities that wouldn't otherwise be available on these modern budget devices.

Happy gaming, and enjoy your trip down memory lane!

Disclaimer: Always ensure you have the rights to use and convert the software you are modifying. This guide is for educational purposes regarding file compatibility.

✅ Works if you have full source.
❌ Very time-consuming; requires embedded systems knowledge.

Click the "Convert" or "Generate" button. The tool will work through the code. If successful, a new file with the .vxp extension will appear in the output folder (usually named VXP or Output).

Sometimes, you don’t need to convert at all. Instead:

But if you absolutely must have a .vxp for a physical device, here’s a pro tip:

Search for "vxp game sites" (like vxpstore.com or getjar.com filtered by VX). Often someone has already converted the classic .jar games you want. Download their pre-converted .vxp instead of converting yourself.

Converting Java to MRE isn't always perfect. Here are common problems and fixes: