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Mojang Studios to Remove Code Obfuscation from Minecraft Java Edition

• By John K. Waters
• November 4, 2025

Mojang Studios announced Tuesday it will eliminate code obfuscation in Minecraft: Java Edition, marking a significant shift in how the company distributes the game to its modding community.

The change, set to take effect with the first snapshot following the complete Mounts of Mayhem update, will make the game's internal code structure visible by including original variable names, field names, and other technical identifiers previously hidden through obfuscation.

Minecraft: Java Edition has used obfuscation since its initial release, a practice common in the gaming industry that scrambles code to prevent direct access to source code. In 2019, Mojang released obfuscation mappings—reference files that allowed modders to match scrambled terms with their original names.

The Swedish developer said the change aims to simplify the creation and maintenance of third-party modifications, a central component of Java Edition's community. Without obfuscation, modders will no longer need to decode scrambled code or rely on mapping files to understand game functions.

To ease the transition, Mojang will provide experimental un-obfuscated releases alongside traditional obfuscated versions starting with the next snapshot, allowing developers of modding tools to adapt their software before the full transition.

The company emphasized that its End User License Agreement and Usage Guidelines remain unchanged. Future releases will include a license file in the game's JAR files that links to the EULA and will no longer include obfuscation maps in the version JSON files.

Mojang did not specify a timeline for the completion of the Mounts of Mayhem update.