Mod Version Inspector

A small Electron desktop app for analyzing Java build artifacts.

Features

• modern interface with drag-and-drop
• Opening a file using Windows Explorer
• Support for .jar, .zip, .class, .litemod and .liteloadermod
• Detecting the Java version from the bytecode
• Detect the loader or plugin type when possible
• heuristic detection of mods created with MCreator
• Retrieve the game version and mod version, if available
• generating a migration plan, a porting workspace, and build stages
• generating loader metadata in stages (mods.toml, fabric.mod.json, quilt.mod.json, plugin.yml)
• toolchain profiles versioned by stage (toolchain-profile.json)
• scripts and guides for setting up the development environment (init-stage.ps1, toolchain-guide.md)
• scripts et guide globaux du workspace (init-workspace.ps1, build-workspace.ps1, workspace-guide.md)
• automatic conversion via the Convert button
• Heuristic source remapping for certain legacy Forge and Fabric names before the build
• Additional heuristic remapping across several Forge/Fabric lifecycles and registries
• stage-specific mapping profiles (mapping-profile.json) to prepare more accurate future MCP/SRG/Mojmap/Yarn remaps
• Enabling remap families based on bridgeFromLegacy and sourcePackages in the mappings profile
• Explicit diagnostics when a useful remap family is blocked by the stage profile
• Open the main output directly from the interface after clicking Convert
• Simple standardization of certain Fabric entry points and final recommendation following conversion

Start

npm install
npm start

Tests

npm test

Notes

• Game version detection depends on the metadata contained in the .jar
• Very old or highly customized mods may not display all the information
• Java does not need to be installed on the machine for analysis
• The current remapping is still heuristic: it helps with common cases but does not yet replace a true MCP/SRG/Mojmap/Yarn remapping