McDeob review
A focused open-source utility for turning Minecraft JARs into readable, mapped Java source.
Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026
McDeob is an open-source desktop utility for Minecraft developers who need readable server or client source code. It downloads the appropriate Minecraft JAR and mappings, remaps the JAR, and can optionally decompile class files into Java source. The tool supports Windows, macOS, and Linux, making it suitable for source inspection across the major desktop platforms. It is designed for reverse engineering and investigation rather than complete mod project creation.
Its strongest area is focused JAR processing. McDeob supports releases and snapshots for Minecraft 1.14.4 and newer, selected legacy versions from 1.7.10 through 1.13.2, and 26.1+. It uses Mojang or Searge mappings depending on the Minecraft version, while command-line options provide debug output and cached JAR handling. This makes it a practical fit for developers who need mapped source as a starting point for understanding Minecraft code.
McDeob is free and open-source, but it is not a full mod development environment. The published capabilities do not include a code debugger, dependency management, artifact packaging, or a visual editor, so developers seeking an integrated project workflow will need other tools. Java 21 or newer is required, and at least 3 GB of RAM is recommended. Its output contains proprietary Minecraft code and is intended for personal use, so it suits source inspection and analysis more than distributing packaged projects. Choose McDeob for focused decompilation and remapping; choose an alternative when project management, debugging, or packaging is central.
McDeob pros and cons
- Where it wins
- Downloads Minecraft JARs and mappings for selected versions
- Remaps and optionally decompiles class files into Java source
- Supports Windows, macOS, Linux, modern releases, and selected legacy versions
- Where it doesn't
- No code debugger or visual editor
- No verified dependency management or artifact packaging
- Requires Java 21 or newer and recommends at least 3 GB of RAM
McDeob fact sheet, pricing and score →
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