Onyx-Launcher icon
Onyx-Launcher icon

Onyx-Launcher

Open-source desktop Minecraft launcher for Windows and Linux with isolated instances, Modrinth modpacks, automatic Java, crash diagnostics, and safe backups.

Onyx-Launcher screenshot 1

Cost / License

  • Free
  • Open Source (MIT)

Application type

Platforms

  • Windows
  • Mac
  • Linux
Onyx-Launcher screenshot 1
Onyx-Launcher screenshot 2
Alternatives  
0likes
49alternatives
0articles
Save

Features

  1.  Portable
  2.  No registration required
  3.  Dark Mode
  4.  Ad-free
  5.  Game Launcher

 Tags

Onyx-Launcher News & Activities

Highlights All activities

Recent activities

Onyx-Launcher information

AlternativeTo Categories

Gaming Software, Games

GitHub repository

  •  11 Stars
  •  5 Forks
  •  7 Open Issues
  •   Updated  
View on GitHub

Popular alternatives

View all
Onyx-Launcher was added to AlternativeTo by lonestill-8059 on and this page was last updated .

No comments or reviews, maybe you want to be first?

Official Links

AppStores & Other Links

What is Onyx-Launcher?

Onyx Launcher is a modern, lightweight, open-source desktop Minecraft launcher for Windows, Linux, and macOS built with Electron, React, and TypeScript.

Key Features:

  • Ghost Mode: Automatically unloads the Electron renderer and GPU process while playing to eliminate background RAM waste.
  • Crash Bisect: Automated binary search diagnostics to instantly identify which mod is crashing your game.
  • Modrinth Integration: Complete .mrpack modpack support, mod catalog search, dependency resolution, and automatic updates.
  • Isolated Instances & Auto-Java: Full separation of worlds, mods, and settings, with automatic setup of Java 8, 17, and 21.
  • Flight Recorder & Telemetry: Built-in FPS, 1% lows, memory tracking, and JVM Garbage Collection pause monitoring via bundled Onyx Probe.
  • Session CSV Export: Export performance metrics and benchmark sessions for external analysis.
  • Data Safety: World Guard snapshots, transactional mod profiles, and safe rollbacks.