ProjT Launcher

Built for control

Stay in charge of every Minecraft instance

ProjT Launcher keeps your modded adventures isolated, reproducible, and easy to maintain. Install, update, and launch everything from lightweight vanilla installs to massive modpacks with a single tool.

01

Modpack comfort

Install curated modpacks from Modrinth or CurseForge in seconds, keep them clean, and roll back when the pack maintainer ships a surprise update.

02

Smart updates

Track individual mods, version changes, and dependencies so you always know what changed before clicking download.

03

Isolated instances

Each instance has its own folder, assets, and configuration. Jump back in time without overwriting worlds or losing settings.

04

Themeable & lightweight

ProjT Launcher uses the Qt toolkit and supports custom themes, so it stays snappy on low-spec machines and still feels personal.

Modpack management without the mess

Switch modloaders, tweak JVM arguments, or fork configuration profiles for friends. Everything lives inside a portable folder that you can back up or sync.

Automatic downloads from Modrinth & CurseForge
Version pinning and downgrade support
Log console with real-time progress

ProjT Launcher installing a Modrinth pack

Granular control over every mod

Missing a single client mod? Search, download, and update it inside the launcher. No more digging through folders or re-downloading entire packs.

Curated discovery surface for the mods you need
Per-instance overrides keep experiments contained
Update previews show what will change before you apply

Managing mods directly in ProjT Launcher

Launcher workflow

From download to launch in four calm steps

You shouldn't have to fight your launcher. ProjT keeps each phase focused and predictable so you can move from idea to gameplay without fires to put out.

01

Pick a platform

Grab the installer that fits your OS. All binaries are signed and mirrored, so getting started is as easy on Linux as it is on Windows.

02

Create instances

Spin up lightweight vanilla profiles or giant modded setups. Each instance remembers its mods, saves, and JVM state independently.

03

Sync & customize

Connect Modrinth and CurseForge accounts, apply your favorite theme, and wire up automatic backups before you hop in.

04

Launch with confidence

Per-instance logs, resource tracking, and built-in updates mean you always know what changed before you smash play.

Ecosystem ready

Bring your favorite services with you

Modrinth & CurseForge

Browse, install, and update packs from both modding giants without opening a browser.

Side-by-side changelog previews
Optional dependency suggestions
Fast mirror-aware downloads

Catpacks & community repos

Ship your own curated experiences with Catpacks or point instances at any open repository.

Deterministic manifests per pack
Shareable URLs for your community
Override support for power users

Matrix-powered support

Matrix rooms stay close to the launcher so you can get help, contribute, or celebrate a release in one tap.

Directly linked knowledge base
Friendly moderation team
Office-hours for contributors

Why players switch

Freedom-focused from the first line of code

ProjT Launcher is made by and for the community. Every feature we ship is reviewed in the open, and you can remix or redistribute it with zero lock-in.

Open

GPL-3 licensed launcher & AGPL-3 website

3

Platforms: Windows, macOS & Linux

Unlimited

Instances with isolated resource packs, mods, and saves

0

Advertising, trackers, or paywalls

Community first

Get involved & stay up to date

Matrix Space

Prefer open chat instead of another Discord server? Join the Matrix Space to talk features, get help, or share your modpack.

Join on Matrix

Source code

ProjT Launcher is GPL-3 and accepts contributions from anyone who cares about user freedom. Fork it, remix it, or ship your own build.

Explore on GitHub

Website: AGPL-3

Docs & Wiki

New to ProjT Launcher? The wiki covers everything from first launch to changing themes or building your own mod catalog.

Browse the wiki

FAQ

Questions from fellow modded players

Does ProjT Launcher support official Microsoft accounts?

Yes. You can authenticate multiple Microsoft accounts side by side while keeping Mojang accounts available for legacy instances.

How does telemetry work?

It doesn't. We never ship tracking or ads, and we keep the source open so you can verify that promise.

Can I move my Prism Launcher instances over?

Absolutely. The wiki has a full migration guide, and ProjT can import worlds, mod lists, and even screenshots from existing folders.

Is there a CLI?

Yes. The launcher exposes a command-line interface for automating downloads, managing Catpacks, or scripting testing flows.

Ready when you are

Download ProjT Launcher and reclaim your modded workflow

One launcher, every platform, and a community that cares about software freedom. No telemetry, no ads—just Minecraft the way you want it.

Download now