Lonestill.OnyxLauncher 1.6.3

Open-source Minecraft launcher for isolated instances, Modrinth content, automatic Java, diagnostics, and safe backups.

Onyx Launcher is a modern Minecraft launcher for Windows and Linux. It manages isolated game instances, Vanilla and popular mod loaders, Modrinth modpacks and mods, automatic Eclipse Temurin runtimes, crash diagnostics, world snapshots, backups, and per-instance performance settings.