QuantumLauncher (Website | Discord | Changelogs)

A simple, powerful, cross platform Minecraft launcher.

Features

	Incredibly Lightweight Uses minimal CPU and RAM! Lighter than the vanilla launcher, common alternatives and even Task Manager!
	Built-in mod store Install your favorite mods and mod loaders from the comfort of one window. Isolate your game versions with instances, so clashes never happen!
	Support for old Minecraft versions (via Omniarchive) Includes skin and sound fixes, and adds rare versions to the list
	Manage hundreds of mods conveniently! Package and share them with friends.

Installation

QuantumLauncher can be installed in several ways.

• Stable releases (recommended) (Windows, macOS, Linux): Available from the website or GitHub Releases.
• Flatpak (Linux):

  flatpak remote-add quantum-launcher oci+https://mrmayman.github.io/ql-flatpak-remote/
  flatpak install io.github.Mrmayman.QuantumLauncher

• Fedora COPR (Linux):

  sudo dnf copr enable apicalshark/quantum-launcher-rpm
  sudo dnf install quantum-launcher

• Nix/NixOS flake (Linux, macOS): See docs/NIX.md for flake usage, the NixOS module, and the Home Manager module.
• Build from source (Windows, macOS, Linux, FreeBSD):

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

  Omit --release for faster compile times during development. Debug builds have worse performance and produce much larger build artifacts.

Downloads and Building

Download stable versions from the website, or from Releases

Or, compile the launcher to get the latest experimental version:

git clone https://github.com/Mrmayman/quantumlauncher.git
cd quantumlauncher
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.
• The official Minecraft launcher is slow, unstable, buggy and frustrating to use, with barely any modding features
• Legacy Launcher lacks many features
• TLauncher is suspected to be malware

File Locations

• Windows: C:/Users/YOUR_USERNAME/AppData/Roaming/QuantumLauncher/
  • You probably won't see the AppData folder (hidden). Press Windows + R and paste this path, and hit enter
• macOS: /Users/YOURNAME/Library/Application Support/QuantumLauncher/
• Linux/FreeBSD: ~/.local/share/QuantumLauncher/ (~ refers to your home directory)

Structure:

• Instances located at QuantumLauncher/instances/YOUR_INSTANCE/
  • .minecraft located at YOUR_INSTANCE/.minecraft/
• Logs in QuantumLauncher/logs/

More info

• MSRV (Minimum Supported Rust Version): Follows Debian stable (currently 1.85.0)
  • 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
• Some assets have additional licensing (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.