QUASAR

Modrinth Integration

Search and install mods, shaders, resource packs, and datapacks directly from Modrinth - results auto-filtered by your instance's game version and loader.

Multi-Loader Instances

Spin up isolated instances on Vanilla, Fabric, Forge, Quilt, or NeoForge - each with its own mods, version, and settings. Playtime tracked per instance.

Content Updates

Quasar checks every mod, shader, and resource pack for updates and lets you apply them individually or all at once per content type - with version badges throughout.

Skin & Cape Editor

Manage a library of skins, preview them on a live 3D model, pick a cape, and apply in one click. Supports both classic and slim model types.

World & Datapack Manager

Browse worlds with seed, spawn, difficulty, game mode, and age stats. Install datapacks from Modrinth or a local zip per world - no file explorer needed.

Java & Memory Control

Auto-detect system Java or download managed Temurin runtimes (8, 17, 21). Set min/max heap per instance with over-allocation warnings and custom JVM flags.

Multi-Account Support

Sign in with Microsoft or play offline. Store and switch between multiple accounts instantly - each with skin preview and real-time session status.

Import & Export

Import Modrinth modpacks (.mrpack) or Quasar instance packs (.qipack) with auto-download of missing files. Export full or lightweight packs to share with others.

Live Game Console

Watch real-time log output with color-coded levels as your game runs. Crash detection surfaces the full crash report automatically - no digging through files.