MultiMC is a custom launcher for Minecraft that allows you to manage multiple independent Minecraft installations from a single interface.
The launcher addresses the friction of running different Minecraft versions, modpacks, and configurations by centralizing installation management. Rather than maintaining separate game directories or relying on the official launcher's limitations, MultiMC lets users create isolated instances with their own versions, mods, and settings, switching between them without conflicts or manual file shuffling.
The project prioritizes predictability, long-term stability, and simplicity over feature proliferation. It suits players and modders who need reliable multi-instance management without unnecessary complexity. The tool is written in C++ and built to be straightforward to compile from source, with clear build documentation provided. Anyone considering adoption should know that the maintainers actively discourage flashy feature additions; contributions are evaluated on whether they expand existing functionality without disruption or risk to the project's future viability. Prospective contributors are asked to discuss ideas on Discord before submitting pull requests, as blind submissions are unlikely to be accepted.
Development activity shows a deliberate, conservative approach to change. The project maintains strict code formatting standards emphasizing readability over dogma, with particular attention to whitespace consistency and list formatting. Translations are managed through a dedicated crowdin platform rather than direct pull requests to the repository, indicating a structured localization workflow. The forking policy is explicit and detailed: while the source code is open under the Apache license, the MultiMC name, logo, and API tokens for Microsoft identity integration cannot be redistributed; forks must provide their own branding and Azure app registration for account logins, with any derivative builds clearly marked as unofficial.
