Pure Build Launcher

A fast, clean, cross-platform sandbox game launcher

One consistent launching experience on Windows, macOS and Linux: installing versions, sorting out Java, fetching modpacks and playing together — all in one tidy interface.

Latest release v0.1.6 · Nov 4, 2026 · Windows / macOS / Linux

3operating systems
6official installers
0.7swarm start (measured)
54automated tests

Everything you need, nothing you don't

From your first install to a multiplayer night with friends, every step is taken care of.

🧩Five loaders, one click

Vanilla, Fabric, Forge, NeoForge, Quilt and OptiFine — all really installed: automatic detection, dependency resolution and version-metadata merging. No more hand-assembling files.

🔑Three ways to sign in

Microsoft accounts (OAuth device-code flow), third-party Yggdrasil servers and offline mode. Credentials stay on your machine.

☕Java, handled for you

Each game version's required Java (8 / 17 / 21) is checked and selected automatically; if it's missing, the Temurin runtime is downloaded from Adoptium and extracted safely.

⬇️Fast downloads that heal themselves

32-way concurrent downloads verified against authoritative SHA1 / SHA256 / SHA512 hashes, corrupt files re-fetched automatically, mirror sources built in, interrupted downloads resumed.

📦Modpacks & Modrinth

Import Modrinth modpacks (.mrpack) in one click, export your instance just as easily, and browse and install mods, resource packs and shaders in-app.

🎮Multiplayer & crash diagnosis

LAN room discovery and invite-code multiplayer; when the game crashes, logs are analyzed automatically with targeted fixes for OOM, mod conflicts and more. A built-in music player keeps you company while you wait.

A look inside

Classic layout · Launcher
Classic layout · Launcher
Classic layout · Downloads
Classic layout · Downloads