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Lucerna
A clean, transparent, open-source Minecraft launcher. No telemetry. No adware. It never touches the Minecraft client.
What Lucerna does
Isolated instances
Every install is its own .minecraft — versions, mods, worlds, and JVM args never bleed across profiles.
Translate the mods you play
Rewrite any line a mod shows on screen — the untranslated ones and the badly translated ones. Your wording is gathered into a resource pack Lucerna switches on for you; the mods themselves are never modified. Optionally let a model draft it — with your own API key, or a model on your own machine so nothing leaves the computer.
Mods, packs and more
Browse Modrinth and CurseForge in-app — mods, modpacks, resource packs, shaders and data packs. Dependencies resolve themselves, and an installed modpack can jump to any published version.
Run your own server
Create, start and diagnose a server from a live console. Plugins, backups, a server.properties editor, datapacks and SFTP export — then spin up a matching client instance in one step.
Skins & capes
A library of your skins with one-click switching and a cape remembered per skin, plus a built-in pixel editor with a live 3D preview. No account needed to edit.
Transparent by construction
Every network request goes through one audited chokepoint with a static host allowlist. No telemetry, no fingerprinting, no hidden processes.
Every loader
Fabric, Quilt, Forge (1.7.10 → current), and NeoForge — installed in-process, no external wizard.
Built to be trusted, not just used
- Open source. GPL-3.0-or-later — forks must stay open, which blocks the re-skinned-with-telemetry forks Lucerna exists to avoid.
- No telemetry. No analytics, no fingerprinting, not even an opt-out variant.
- Never modifies Minecraft. The Java runtime and game files come straight from Mojang and are left untouched.
Download
Latest release: latest
Windows 10/11 (64-bit). Java is not required — Lucerna downloads the correct runtime per Minecraft version. Not code-signed yet: on first run, SmartScreen → “More info” → “Run anyway”.
Feedback & bug reports
Found a bug or have an idea? Send it straight from here. We store only what you write — no IP, no tracking. Email is optional and only used to reply.