Very hard to find a version compatible with modern S30+ or MTK phones. 2. Manual Re-development (MRE SDK)
However, there are specialized methods to bridge the gap if you are trying to run games or apps on a MediaTek device. How to Convert JAR to VXP jar to vxp converter online
Technically, no single-click web tool can perfectly translate the underlying Java code of a JAR file into the C/C++ based binary format of a VXP file. Most "converters" you find online are likely general archive tools that won't result in a working app for your phone. Very hard to find a version compatible with
If you have the source code of the Java app, you can use the on a Windows PC to rebuild the application specifically for the MRE platform. Install the MRE SDK on your computer. Import your project assets (images, sounds). Rewrite the logic using the SDK's C-based API. Compile the project into a .vxp file. Critical Step: Signing Your VXP File How to Convert JAR to VXP Technically, no
Since a direct conversion isn't native, you generally have two paths: 1. The "Wrapper" Method (Advanced)
Tools like the VXPatch Online Tool allow you to upload your VXP and IMSI to create a "patched" version that your phone will accept. Comparison: JAR vs. VXP JAR (Java Archive) VXP (Mobile Application) Platform Java ME (J2ME) MediaTek MRE Language C / C++ (compiled to binary) Common Devices Older Nokia, Sony Ericsson MediaTek feature phones, S30+ Execution Needs Java Virtual Machine Runs natively on MRE
Even if you find a pre-converted VXP file or build one yourself, most feature phones (like the Nokia 225 or 215) will not run them unless they are to your specific SIM card.