QuantumLauncher

Website | Discord | Changelogs

A minimalistic Minecraft launcher for Windows, macOS and Linux.

QuantumLauncher offers a lightweight and responsive experience. It's designed to be simple and easy to use, with a focus on performance and features.

Features

Lightweight and responsive

Install fabric, forge or optifine with ease

Build in mod store to download your favorite mods

Isolate your different game versions with instances!

Full support for old Minecraft versions, integrated with Omniarchive. Includes skin and sound fixes!

Neatly package your mods into presets, and share it with your friends!

Built in themes!

Downloads and Building

You can download the stable version from the website linked above, or from the Releases button

Or, you can compile the launcher to get the latest experimental version (with potentially broken and untested features). To compile the launcher:

git clone https://github.com/Mrmayman/quantumlauncher.git
cd quantum-launcher
cargo run --release

You can omit the --release flag for faster compile times, but slightly worse performance and MUCH larger build file size.

Why QuantumLauncher?

• QuantumLauncher provides a feature rich, flexible, simple and lightweight experience with plenty of modding features.

What about the others? Well...

• The official Minecraft launcher is slow, unstable, buggy and frustrating to use, with barely any modding features.
• Prism Launcher is a great launcher overall, but it does not support offline accounts. Same for MultiMC.
• Legacy Launcher isn't as feature rich as this
• TLauncher is suspected to be malware

File Locations

• On Windows, the launcher files are at C:/Users/YOUR_USERNAME/AppData/Roaming/QuantumLauncher/.
• You probably won't see the AppData folder. Press Windows + R and paste this path, and hit enter.
• On Linux, the launcher files are at ~/.local/share/QuantumLauncher/. (~ refers to your home directory).
• Instances located at QuantumLauncher/instances/YOUR_INSTANCE/
• .minecraft located at YOUR_INSTANCE/.minecraft/.
• Launcher logs are located at QuantumLauncher/logs/.

More info

• MSRV (Minimum Supported Rust Version): 1.82.0
  • Any mismatch is considered a bug, please report if found
• Roadmap/Plans
• Contributing
• Test Suite

Licensing and Credits

• Most of this launcher is licensed under the GNU General Public License v3
• There are a few exceptions such as GitHub actions and assets. (more info)

Many parts of the launcher were inspired by https://github.com/alexivkin/minecraft-launcher/. Massive shoutout!

Notes

This launcher supports offline mode, but it's at your own risk. I am not responsible for any issues caused. You should buy the game, but if you can't, feel free to use this launcher until you eventually get the means (like me).

If anyone has any issues/complaints, just open an issue in the repo.