Converting (Java Archive) files to .vxp (Maui Runtime Environment) format is a common goal for users wanting to run classic mobile games and apps on modern feature phones, such as the Nokia S30+ series . While these two formats serve a similar purpose—providing executable applications for mobile devices—they are fundamentally different runtimes and are not directly cross-compatible .
Websites like FileProInfo allow you to upload a JAR or JAD file and convert it to VXP.
Re-compile the application resources specifically for the MRE platform to ensure all hardware calls (screen resolution, button mapping) are correct. Critical Step: Signing the VXP File JAR File Overview
You may need to decompile the original JAR into source code using a tool like JD-GUI.
Select the output folder and specifically choose the VXP conversion option .
Below is an updated guide on the current methods available for this conversion process. Understanding the Formats