A custom launcher for Minecraft that allows you to easily manage multiple installations of Minecraft at once
C++ C CMake Java Other
Latest commit bea1b5d Jul 21, 2017 @peterix peterix GH-1929 do not allow non-current update task to affect the update pro…

Errors are handled by setting a flag and failing on the next call to next()



MultiMC 5

MultiMC is a custom launcher for Minecraft that allows you to easily manage multiple installations of Minecraft at once. It also allows you to easily install and remove mods by simply dragging and dropping. Here are the current features of MultiMC.


The project uses C++ and Qt5 as the language and base framework. This might seem odd in the Minecraft community, but allows using 25MB of RAM, where other tools use an excessive amount of resources for no reason.

We can do more, with less, on worse hardware and leave more resources for the game while keeping the launcher running and providing extra features.

If you want to contribute, either talk to us on IRC(esper.net/#MultiMC), or pick up one of the issues that are ready for development: Stories in Ready


If you want to build MultiMC yourself, check BUILD.md for build instructions.

The ci server is running at ci.multimc.org, where you can watch the builds happen in (or very close to) real time. It can also serve as a nice reference on how to set up the build environment on your end.

According to travis.ci, the builds are currently Build Status

Code formatting

We use Clang Format to format the project. We highly recommend setting it up so the project stays well formatted.


Translations can be done either directly in the translations repository or using our translation server. For more details, see: Translating-MultiMC.

Currently, MultiMC is Translation Status


We keep MultiMC open source because we think it's important to be able to see the source code for a project like this, and we do so using the Apache license.

Part of the reason for using the Apache license is we don't want people using the "MultiMC" name when redistributing the project. This means people must take the time to go through the source code and remove all references to "MultiMC", including but not limited to the project icon and the title of windows, (no MultiMC-fork in the title).

Apache covers reasonable use for the name - a mention of the project's origins in the About dialog and the license is acceptable. However, it should be abundantly clear that the project is a fork without implying that you have our blessing.


Copyright © 2013-2017 MultiMC Contributors

Licensed under the Apache License, Version 2.0 (the "License"); you may not use this program except in compliance with the License. You may obtain a copy of the License at http://www.apache.org/licenses/LICENSE-2.0.

Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License.