Freedom251 › Minecraft Launchers
FLauncher
What FLauncher is
FLauncher is free software for Windows and macOS that manages Minecraft installations, accounts, and modpacks. It keeps each instance in its own folder and lets users choose a Java version per instance, with Java runtime management included. A built-in modpack catalog supports catalog imports, and FLauncher can install modpacks and mods from Modrinth and CurseForge. Automatic updates are supported. Optional performance controls include optimized JVM flags, automatic memory sizing, and game-process priority. On Windows, an optional setting can register an instance's javaw.exe as a high-performance GPU app. Release notes describe per-instance account locking, proxies, language overrides, a Linkability Report, and stream-safe username masking. For in-game server routing, a proxy mod uses the FLAUNCHER_PROXY environment variable to route the game's web traffic and hand off the proxy. FLauncher is a rebranded and extended fork of Prism Launcher, descended from PolyMC and MultiMC. It is released as free software under GPL-3.0-only.
Who it suits
FLauncher suits Minecraft players on Windows or macOS who need separate installations, modpack management, and per-instance Java choices. It also fits users seeking optional performance and account-privacy controls.
What it does well
- Free under GPL-3.0-only
- Supports Windows and macOS
- Separate folders for each instance
- Installs mods from Modrinth and CurseForge
- Manages Java versions per instance
What to know first
- Limited to Windows and macOS
- Proxy routing requires the FLAUNCHER_PROXY environment variable
- Some performance features are optional
Plans
| Plan | Billed and limits | Price |
|---|---|---|
| Free | Free software under GPL-3.0-only | Free |
| Free software | free software · multiple installations · accounts · modpacks · Modrinth and CurseForge downloads | Free |
As github.com lists them, read 11 Oct 2026. The maker's own page has the final word.
Verdict
FLauncher focuses on isolated Minecraft instances, modpacks, and Java management while adding optional performance and privacy controls. It is a practical fit for players using either listed desktop platform.
Facts from FLauncher's own pages
- Account locking
- A bound instance refuses to launch when its designated account is unavailable or invalid. · github.com, 15 Oct 2026
- Account privacy
- Release notes describe per-instance account locking, proxies, language overrides, a Linkability Report, and stream-safe username masking. · github.com, 11 Oct 2026
- Automatic updates
- Installed MSVC builds from version 12.0.2 onward are stated to auto-update. · github.com, 15 Oct 2026
- Built-in modpack catalog
- Yes · github.com, 22 Sept 2026
- CurseForge integration
- The launcher can install mods and modpacks from CurseForge. · github.com, 15 Oct 2026
- Discrete GPU setting
- Version 12.2.0 can register the exact javaw.exe used by an instance as a high-performance Windows GPU application. · github.com, 15 Oct 2026
- Documentation depth
- The project directs builders to Prism Launcher's upstream development documentation rather than maintaining a separate FLauncher build manual. · github.com, 15 Oct 2026
- Downloads
- The 12.0.4 release notes give a Windows installer filename and say installed MSVC copies from version 12.0.2 onward auto-update. · github.com, 11 Oct 2026
- Free plan
- Yes · github.com, 22 Sept 2026
- Implementation
- The project is written in C++ with Qt 6 and uses CMake. · github.com, 15 Oct 2026
- Independent distribution listing
- Flathub lists the upstream Prism Launcher as a free desktop application with a 40 MiB download and marks support status unknown; this is not an FLauncher listing. · flathub.org, 15 Oct 2026
- Instance isolation
- Each Minecraft instance is kept in its own folder. · github.com, 15 Oct 2026
- Java runtime management
- Yes · github.com, 22 Sept 2026
- Java selection
- Users can choose a Java version separately for each instance. · github.com, 15 Oct 2026
- Language override
- An instance can override the Minecraft client locale independently of other instances. · github.com, 15 Oct 2026
- License
- FLauncher is distributed as free software under GPL-3.0-only. · github.com, 15 Oct 2026
- Limit: old Java
- The release notes warn that Java 8 builds older than update 40 may reject the generated garbage-collector flags. · github.com, 15 Oct 2026
- Limit: proxy routing
- In-game server routing still depends on a proxy mod; the launcher hands the proxy information to that mod. · github.com, 15 Oct 2026
- Limit: wrapper commands
- Windows process-priority optimization is not applied when a wrapper command is configured. · github.com, 15 Oct 2026
- Linkability report
- The account-privacy tools scan instances for shared accounts, proxies or unprotected configurations that could connect identities. · github.com, 15 Oct 2026
- macOS build
- The repository gives Homebrew and CMake commands that produce an FLauncher.app bundle. · github.com, 15 Oct 2026
- Maker identity
- The repository is owned by the GitHub account NotFuture1, whose profile display name is future. · github.com, 15 Oct 2026
- Modpack import
- catalog · github.com, 22 Sept 2026
- Modrinth integration
- The launcher can install mods and modpacks from Modrinth. · github.com, 15 Oct 2026
Where FLauncher stands on Freedom251
- Minecraft Launchers#2 of 76