A small, fast, and nimble Minecraft launcher

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What is this

Conic Launcher is a small, fast, and nimble desktop Minecraft launcher: the core logic is implemented in Rust and the interface is built with Slint, a native UI toolkit. It features a small installation footprint, fast startup, low resource consumption, and even helps reduce carbon emissions.

From creating instances and installing loaders, to searching for mods and inviting friends to play together, to launching the game and tracking playtime — the entire workflow can be completed in a single app.

The project is currently in early Alpha. Features and UI are rapidly iterating — feel free to try it out and report issues.

Features

Multi-instance Management

Browse instances grouped by mod loader, with sorting, search, and favorites support. Each instance has its own settings, custom background, playtime tracking, and last-played timestamp at a glance.

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Support for All Major Loaders

Choose your Minecraft version and loader version — the launcher handles the rest. Vanilla, Forge, NeoForge, Fabric, and Quilt are all supported, with real-time installation progress.

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Mod & Resource Pack Marketplace

Built-in Modrinth and CurseForge search: browse project details and dependencies, read translated summaries, and install mods or resource packs into your instances with one click. You can also manage locally installed mods directly.

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Conic Nexus Cross-LAN Multiplayer

No extra tools needed: create a group, share the invite code with friends, and join the same world together. The launcher detects your network environment (NAT type) and provides optimization suggestions.

Multiple Login Methods

Supports Microsoft account login (device code flow), offline login, and any Authlib-Injector / Yggdrasil external authentication server. Accounts feature 3D skin preview, cape display, and skin uploading.

Hassle-free Launch Experience

Automatically scans for Java on your system, or can download a suitable runtime automatically. Memory is auto-allocated (with 32-bit Java cap protection). The launch process is fully visualized: downloading game files, installing loaders, resolving dependencies, and waiting for the process to start.

Advanced users are not forgotten either — JVM garbage collector, JVM arguments, game arguments, classpath, wrapper command, and pre/post launch commands are all customizable.

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Saves & Game Data

Browse save world maps, manage data packs and resource packs, and view game screenshots — all within the launcher.

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UI & Personalization

Four Catppuccin themes (Mocha · Macchiato · Frappé · Latte), plus high-contrast variants, with automatic light/dark mode switching following your system setting. Custom launcher backgrounds are supported. Built-in music player with local music playback and spectrum visualization.

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And More

• In-app auto-updates and game version update notifications
• Multi-threaded downloads with adjustable connection limits and speed caps; mirror server and system proxy support
• Global search (/) and command palette (;)
• Playtime tracking and activity calendar

Download

Download the installer for your platform from GitHub Releases or Official Website:

Platform	Architecture	Formats
Windows	x64 · arm64	MSI · Portable exe
macOS	Apple Silicon · Intel	DMG
Linux	x64 · arm64	deb · rpm · AppImage

The app includes built-in auto-updates — no manual upgrades needed after installation.

Requires macOS 11.0 (Big Sur) or later.

The standalone Windows .exe is a single file, but it imports VCRUNTIME140.dll: a machine without the Visual C++ Redistributable (most with Office or .NET already have it) will not start it. The .msi installs the same executable.

Build from Source

Make sure you have Rust 1.88+ installed; on Linux, install the build dependencies as well.

git clone https://github.com/conic-apps/launcher.git
cd launcher
cargo run              # Development & debugging
cargo build --release  # Production build

Contributing

Contributions are welcome! Please read CONTRIBUTING.md for guidelines on how to get started, set up your development environment, and submit a pull request.

Architecture

The interface is built with Slint and wired to the domain crates directly. app/ holds the binary and the .slint tree; each capability lives in its own crates/* workspace module, so they evolve independently and compose as needed.

For the full picture — storage roots, app layering, the UI bucket layout and the crate map — see ARCHITECTURE.md.

License

This project is distributed under GPL-3.0 with additional terms under GPLv3 Section 7:

1. When distributing modified versions, you must reasonably change the software name or version number to distinguish it from the original (per GPL-3.0 §7(c)); you need to replace all project-name references in the source code.
2. You must not remove copyright notices displayed in the software (per GPL-3.0 §7(b)).
3. If anyone enters contractual terms with recipients and assumes liability, the licensor and authors are not held jointly liable (per GPL-3.0 §7(b)).

Acknowledgements

• Catppuccin — Beautiful, pastel theme palette
• forge-install-bootstrapper by bangbang93 — Forge install bootstrapping
• MCIM — CurseForge translated summaries and mirror caching
• All players who have provided suggestions and feedback

Disclaimer

Conic Launcher is not an official Minecraft product and is not approved by or associated with Mojang Studios. "Minecraft" is a trademark of Mojang AB. Any use of the Minecraft brand in this project complies with Mojang Studios' Brand and Asset Guidelines.