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Jace Launcher

💻 App

Minecraft: Java Edition launcher with Fabric/Quilt/Forge/NeoForge, Modrinth & CurseForge, and a skin & cape changer Resources

374 downloadsUpdated 1 day agoby okjace

⛏ Jace Launcher

A desktop launcher for Minecraft: Java Edition, written in Python and Qt (PySide6).

Features

  • Every Java Edition version: releases, snapshots, betas and alphas, from Mojang's version manifest.
  • Mod loaders: Fabric, Quilt, Forge, NeoForge and Legacy Fabric (1.3–1.13).
  • Java is handled for you: each version gets the Java runtime Mojang ships for it (Java 8, 16, 17 or 21). You can also point it at your own Java.
  • Instances: every instance has its own folder for mods, saves, resource packs and shaders. Versions, libraries and assets are downloaded once and shared between instances.
  • Instance shortcuts: right-click an instance and choose Create shortcut, or use the instance's Settings. You get a desktop and Start menu / Launchpad / applications-menu shortcut that starts that instance straight away, with no launcher window.
  • Per-instance settings: window size, memory, Java and JVM arguments.
  • Synced folders: share worlds, resource packs, shaders, screenshots and schematics between instances (each instance's Sync tab). New instances sync resource packs, shaders and screenshots by default. Under Settings → Synced folders you can move the shared folder into Dropbox, OneDrive or Google Drive to sync between computers. Uses folder links on Linux and macOS, and junctions on Windows (no admin rights needed).
  • Instance icons: choose any image, or design one in the Icon builder (shape, colors and gradients, text, symbols, or any Minecraft block or item texture). Modpacks use their own icon automatically.
  • Modrinth: search and install mods, modpacks, resource packs and shaders. Results are filtered to the selected instance's version and loader, and required dependencies are installed automatically.
  • Mod updates: Check for updates on an instance's Mods tab finds newer compatible versions (even for mods you added by hand, matched by file hash on Modrinth). Update all installs them and keeps disabled mods disabled.
  • Dependencies: missing required dependencies are installed automatically when you install a mod, add a jar by hand, or check for updates, including dependencies of dependencies.
  • CurseForge (optional): the same browsing once you add a free API key in Settings.
  • Already installed? In Browse, mods, resource packs and shaders already in the selected instance show a red Delete button instead of Install. That includes ones you added by hand. Click it to remove the item from the instance. Modpacks always show Install.
  • Modpacks: install from either site, or import a .mrpack or CurseForge .zip file.
  • Skin and cape changer:
    • front and back preview with the cape shown
    • Classic or Slim arm model
    • upload a skin from a file, or copy any player's skin by username
    • reset to the default skin
    • equip any cape you own, or wear none
    • a local skin library you can apply with a double-click
  • Accounts: Microsoft sign-in, plus offline accounts for singleplayer and offline-mode servers.
  • Friends list: add friends by Minecraft username and see their skin. Save the server they play on to see if they're online there, and click Join to launch straight into it. There's no Jace Launcher server, so "online" only works on servers that share their player list.
  • Game log window, plus per-instance memory, Java and JVM argument overrides.

Running

./run.sh

The first run creates .venv and installs requirements.txt. To run it by hand:

python3 -m venv .venv && .venv/bin/pip install -r requirements.txt
.venv/bin/python -m jace

You need Python 3.10 or newer. You don't need Java installed.

Downloads for Windows, macOS and Linux

GitHub Actions builds every platform, because PyInstaller can't build Windows or Mac apps from Linux. The workflow is in .github/workflows/build.yml.

PlatformFileInstall
Windows 10/11JaceLauncher-<ver>-windows-x64.exeRun it; a setup wizard installs it (no admin needed). It also runs under Wine/Bottles, which CI tests.
macOS 12+ (Apple Silicon)JaceLauncher-<ver>-macos-arm64.app.zipSafari unzips it to Jace Launcher.app in Downloads. Open it and a setup wizard installs it (see below).
macOS 12+ (Intel)JaceLauncher-<ver>-macos-x86_64.app.zipSame as above.
LinuxJaceLauncher-<ver>-x86_64.AppImageRun it; the setup wizard does the rest (see below).

Every push to main builds all of these; download them from the run's Artifacts. Pushing a version tag also publishes a GitHub Release:

git tag v1.0.0 && git push origin v1.0.0

The first launch on every platform asks you to add your accounts. Settings → Delete Jace Launcher works on every platform. On Windows you can also uninstall from Settings → Apps → Installed apps.

Installing is required: the downloaded AppImage, .app and .exe only run the setup wizard. Cancelling setup closes the app. After installing, the installed copy starts and the download is removed where possible.

Updates: when a new release is published, an Update to vX button appears in the bottom bar. You can also use Settings → Updates → Check for updates. One click downloads the new version, replaces the installed app and restarts it. Your instances, worlds and accounts are kept.

Windows setup wizard

Running the downloaded .exe opens the same wizard as on Linux and macOS:

  1. add your accounts
  2. choose the install folder (default %LOCALAPPDATA%\Programs\Jace Launcher, no admin needed)
  3. choose a Start menu entry, a desktop shortcut, an "Installed apps" entry and a jace-launcher terminal command
  4. installs, starts the installed copy, and deletes the downloaded file

Unsigned builds: the apps aren't signed with paid Apple or Microsoft certificates, so:

  • macOS says the app "can't be opened". Right-click it, choose Open, then Open again (only needed once). On macOS 15 and newer, go to System Settings → Privacy & Security → Open Anyway instead.
  • Windows SmartScreen shows "Windows protected your PC". Click More info → Run anyway.

To build on a Mac or Windows PC yourself, install the requirements plus pyinstaller pillow, then run python packaging/build.py.

macOS setup wizard

When you open Jace Launcher.app from Downloads (or anywhere it isn't installed yet), a setup wizard:

  1. signs in to your accounts
  2. lets you choose where to install: /Applications, ~/Applications, or any other folder
  3. can add the app to the Dock and your desktop, and add a jace-launcher Terminal command
  4. removes the "downloaded from the internet" flag, so macOS won't later say the app is "damaged"
  5. registers the app with Launchpad and Spotlight, starts the installed copy, and removes the leftover copy in Downloads

Dragging the app into Applications yourself also works. Settings → Delete Jace Launcher removes the app, its Dock icon and its shortcuts.

AppImage and installer

Build a single-file AppImage that includes Python, Qt and everything else:

./packaging/build_appimage.sh      # -> dist/JaceLauncher-<version>-x86_64.AppImage

The first time you run the AppImage, a setup wizard opens. It:

  1. signs in to your accounts (Microsoft or offline)
  2. lets you choose where to install (default ~/Applications)
  3. adds Jace Launcher to the applications menu, creates a desktop shortcut and adds a jace-launcher terminal command
  4. installs AppStream metadata (~/.local/share/metainfo), which software centers use to describe apps

You can also run it from a terminal:

./JaceLauncher-x86_64.AppImage --install --yes     # install with defaults, no wizard
./JaceLauncher-x86_64.AppImage --uninstall         # remove (keeps your worlds)
./JaceLauncher-x86_64.AppImage --uninstall --purge # remove everything

To uninstall from the desktop, right-click the app in the menu and choose Uninstall Jace Launcher, or use Settings → Desktop integration.

Getting into an app store

GNOME Software and KDE Discover only list apps from a package source: apt, Flatpak/Flathub or Snap. A local AppImage can't add itself to them. To appear there:

  • Flathub (what GNOME Software shows by default): package the app as a Flatpak and send a submission to Flathub's review. The AppStream metainfo this project generates is the file Flathub needs. It currently has no <url type="homepage"> because there's no website yet.
  • AppImageHub (appimage.github.io): open a pull request with the AppImage's download URL. AppImage stores like Gear Lever and AppImagePool then list it.
  • Snap Store: package it with snapcraft.

Where things are stored

PathContents
~/.jacelauncher/gameShared versions, libraries, assets and Java runtimes
~/.jacelauncher/instances/<name>/minecraftOne instance's game folder (mods, saves, …)
~/.jacelauncher/skinsYour skin library
~/.jacelauncher/accounts.jsonAccount tokens (keep this private)

On Windows the folder is %APPDATA%\.jacelauncher. To use a different location, set JACE_LAUNCHER_HOME.

CurseForge

CurseForge's API requires a key. Get one for free at https://console.curseforge.com, then paste it into Settings → Integrations. Some authors don't allow launchers to download their files. The launcher respects that setting, so it lists those files for you to download by hand.

Code layout

jace/
  config.py        paths and settings
  accounts.py      Microsoft/Xbox/Minecraft auth, offline accounts, skin & cape API
  loaders.py       vanilla + Fabric/Quilt/Legacy Fabric (meta API) + Forge/NeoForge (installer)
  instances.py     instance model, install, launch command
  content.py       Modrinth & CurseForge clients, mod/modpack installs
  skin_render.py   2D skin/cape renderer
  ui/              PySide6 pages (library, browse, skins, accounts, settings)

Versions

  • Jace Launcher 1.11.11.11.1release
    windowsmacoslinux
    1 day ago · 0 downloads
    ↗ Windows (257 MB)↗ macOS (Apple Silicon) (207 MB)↗ macOS (Intel) (225 MB)↗ Linux (264 MB)
    Changelog
    • Bedrock on Linux asks you to sign in to Xbox, so Realms, servers, Friends and the Marketplace work. Before, the game started signed out.
      • Pressing Play opens a small window with a code. Your browser opens microsoft.com/link with the code filled in (it's also copied), and you sign in with the Microsoft account that owns Minecraft. The window closes by itself when you're done.
      • Play offline is still there for single-player and LAN.
    • You sign in once for all your Bedrock instances, not once per instance.
  • Jace Launcher 1.11.01.11.0release
    windowsmacoslinux
    2 days ago · 1 downloads
    ↗ Windows (258 MB)↗ macOS (Apple Silicon) (207 MB)↗ macOS (Intel) (230 MB)↗ Linux (264 MB)
    Changelog
    • Bedrock on Linux now uses BedrockOnLinux instead of the Minecraft Bedrock Launcher. It runs the Windows version of Minecraft Bedrock, with real Xbox sign-in, Friends, servers, Realms and the Marketplace. You need a Microsoft account that owns Minecraft; Google Play isn't involved anymore.
      • Jace Launcher downloads BedrockOnLinux and checks it against its release's checksums. If you already have a copy in ~/Applications, installed as a package, or as a Flatpak, it uses that one.
      • The version list includes every Windows Bedrock release. Tick Snapshots to add Minecraft Preview.
      • The first Play links your Microsoft account in a sign-in window, so the game can be downloaded from the Microsoft Store. Then it downloads the version you picked. Each version and Proton download only once, and every instance shares them.
      • Each instance still has its own worlds, packs and settings. It's a separate BedrockOnLinux profile, so you sign in to Xbox inside the game once per instance.
      • Importing packs and worlds, and Jace Store's Bedrock section, work as before.
      • Bedrock instances you made with the Minecraft Bedrock Launcher keep their old worlds in their folder, under games/com.mojang.
    • macOS still uses the Minecraft Bedrock Launcher, and Windows still plays the official game.
  • Jace Launcher 1.10.41.10.4release
    windowsmacoslinux
    3 days ago · 0 downloads
    ↗ Windows (252 MB)↗ macOS (Apple Silicon) (207 MB)↗ macOS (Intel) (225 MB)↗ Linux (264 MB)
    Changelog
    • Jace Launcher starts again on niri, Sway, Hyprland and other Wayland desktops that have AppImageLauncher installed.
      • AppImageLauncher runs before every AppImage. It's a Qt5 app, and without qt5-wayland it crashed before Jace Launcher could start.
      • The menu entry, desktop shortcut, jace-launcher command, instance shortcuts and updates now start Jace Launcher directly, without it.
      • Existing entries are fixed the next time Jace Launcher starts.
  • Jace Launcher 1.10.31.10.3release
    windowsmacoslinux
    4 days ago · 9 downloads
    ↗ Windows (251 MB)↗ macOS (Apple Silicon) (207 MB)↗ macOS (Intel) (230 MB)↗ Linux (264 MB)
    Changelog
    • About half the camera delay in Minecraft Education on Linux. While the game is open, Jace Launcher asks your system for the Performance power profile (power-profiles-daemon), and it switches back on its own when you close the game. On a laptop set to Balanced, the emulator, Android's frame encoder and the game were all waiting on low CPU clocks. Measured from an input to the picture changing, the median delay dropped from about 213 ms to about 122 ms.
  • Jace Launcher 1.10.21.10.2release
    windowsmacoslinux
    4 days ago · 8 downloads
    ↗ Windows (257 MB)↗ macOS (Apple Silicon) (207 MB)↗ macOS (Intel) (225 MB)↗ Linux (264 MB)
    Changelog
    • Less mouse lag in Minecraft Education on Linux. Android compresses every frame of the game window in software, on a single thread. On smaller PCs, that encoder was saturated at 1280×720, so frames queued up behind it and the mouse lagged.
      • On those PCs Android now renders at 1024×576 (the same shape as your monitor), and the stream uses a lower bitrate.
      • PCs with 8+ CPU threads and 16 GB+ RAM still get 1920×1080.
  • Jace Launcher 1.10.11.10.1release
    windowsmacoslinux
    4 days ago · 8 downloads
    ↗ Windows (258 MB)↗ macOS (Apple Silicon) (207 MB)↗ macOS (Intel) (230 MB)↗ Linux (264 MB)
    Changelog
    • Minecraft Education on Linux lags much less. Android's preinstalled Google apps (YouTube, YouTube Music, Gmail, the Google app, Messages, Docs, Photos and more) ran in the background and filled the virtual tablet's memory, so it swapped while you played.
      • Jace Launcher now turns those apps off in its emulator. This can be undone, and the Play Store, Play services, Chrome and the keyboard stay on.
      • It also clears background apps before the game starts.
      • Android's swap use dropped from about 900 MB to about 350 MB.
    • No black bars in full screen. Android's screen now has the same shape as your monitor (for example, 1280×720 on a 1920×1080 screen), or as your game window if you set a size. If the shape changes, Android restarts once to apply it.
  • Jace Launcher 1.10.01.10.0release
    windowsmacoslinux
    5 days ago · 8 downloads
    ↗ Windows (258 MB)↗ macOS (Apple Silicon) (207 MB)↗ macOS (Intel) (230 MB)↗ Linux (264 MB)
    Changelog
    • Minecraft Bedrock on Windows. Bedrock instances play the official Minecraft for Windows. If it isn't installed, Play opens its Microsoft Store page and continues once it's installed. Worlds and packs from Browse and the instance's tabs go into the game's own folder.
    • Minecraft Education on Windows and macOS. Education instances use Microsoft's official app. On Play, Jace Launcher downloads it from Microsoft, installs it (silently on Windows, into Applications on macOS) and keeps it updated.
    • Minecraft Education on Linux runs much faster. The virtual tablet is now sized for your PC:
      • Its screen is 1280×800 (1920×1200 on PCs with 8+ CPU threads and 16 GB+ RAM).
      • Its RAM and CPU cores fit what you have, so your PC no longer swaps.
      • Android's animations are off.
      • On a 6-thread, 8 GB laptop it went from about 10 to about 48 FPS.
  • Jace Launcher 1.9.01.9.0release
    windowsmacoslinux
    5 days ago · 8 downloads
    ↗ Windows (252 MB)↗ macOS (Apple Silicon) (207 MB)↗ macOS (Intel) (225 MB)↗ Linux (263 MB)
    Changelog
    • Minecraft Education no longer shows a black screen. Android now draws with ANGLE on your GPU's Vulkan (the emulator's GuestAngle mode). The emulator's default OpenGL ES 3.0 couldn't run the game's renderer.
    • Just press Play. The first time, Jace Launcher sets up the Android emulator (you accept the Android SDK License), then installs Minecraft Education from Google Play by itself. You no longer need the Setup tab.
    • Google sign-in gets its own small window. If Android isn't signed in to Google yet, Google Play opens on the Minecraft Education page in a small window. Once you're signed in, Jace Launcher presses Install for you.
    • New game window. The emulator runs without its own window, and the game appears in a clean scrcpy window:
      • no emulator toolbar
      • no "not responding" prompts while Android starts
      • Android's "isn't responding" and "Viewing full screen" pop-ups are turned off
    • Real full screen. There's no bar and no black screen, and Gamescope isn't needed anymore.
    • In the game, the keyboard and mouse act like real ones plugged into the tablet. Press Left Alt to free the mouse.
  • Jace Launcher 1.8.21.8.2release
    windowsmacoslinux
    5 days ago · 8 downloads
    ↗ Windows (258 MB)↗ macOS (Apple Silicon) (207 MB)↗ macOS (Intel) (230 MB)↗ Linux (263 MB)
    Changelog
    • Bedrock instances list every Bedrock version, and the one you pick downloads when you press Play, like Java versions.
      • The list comes from the Minecraft Bedrock Launcher's version database (about 130 releases for your CPU). Tick Snapshots when creating an instance to include betas.
      • Downloads need your Google Play account, and only the Minecraft Bedrock Launcher has it. So on Play, its window opens with that version selected: click Download and play there. Jace Launcher closes it when the download finishes and starts Bedrock in your instance.
      • The Download versions… button is gone. Open Bedrock launcher remains in the New instance window for signing in to Google Play.
  • Jace Launcher 1.8.11.8.1release
    windowsmacoslinux
    5 days ago · 9 downloads
    ↗ Windows (258 MB)↗ macOS (Apple Silicon) (207 MB)↗ macOS (Intel) (225 MB)↗ Linux (263 MB)
    Changelog
    • Bedrock: "Install Bedrock launcher" now checks that the launcher actually got installed, and shows Flatpak's error if it didn't. Before, it could report success when nothing was installed.
    • Bedrock: if the Minecraft Bedrock Launcher closes right after "Download versions…", Jace Launcher now shows its error output instead of doing nothing.
    • Bedrock: Flatpak and mcpelauncher now run without Jace Launcher's bundled library paths, which could break them.
    • After an update, the restarted Jace Launcher no longer inherits Qt and library paths from the old copy.
    • Education setup now retries when Google's download server can't be reached (for example, a brief DNS failure) and shows a clear message if it still fails.
    • Added --self-test-bedrock, which writes Bedrock diagnostics to the file named in JACE_SELF_TEST_OUT.
  • Jace Launcher 1.8.01.8.0release
    windowsmacoslinux
    5 days ago · 8 downloads
    ↗ Windows (251 MB)↗ macOS (Apple Silicon) (207 MB)↗ macOS (Intel) (230 MB)↗ Linux (263 MB)
    Changelog
    • Minecraft Education now runs in Google's Android Emulator instead of Waydroid. It's more reliable, and setup needs no password or system changes.
      • Setup → Set up Android emulator downloads everything into Jace Launcher's folder, about 2 GB: Google's Android Emulator, Android 14 with Google Play (Play Store certified), and a virtual tablet. You accept Google's Android SDK License first.
      • Open Google Play to sign in and install Minecraft Education, or Install APK….
      • Play opens it in the emulator's window. With Settings → Full screen it opens full screen through Gamescope.
      • Remove emulator frees the space again.
      • It needs hardware virtualization (KVM), which most computers have.
    • The project moved to github.com/okjace (website: https://okjace.github.io/jace-launcher/). Update checks keep working from older versions.
  • Jace Launcher 1.7.01.7.0release
    windowsmacoslinux
    6 days ago · 8 downloads
    ↗ Windows (257 MB)↗ macOS (Apple Silicon) (207 MB)↗ macOS (Intel) (225 MB)↗ Linux (263 MB)
    Changelog
    • Minecraft Education on Linux: New instance → Mod loader: Education (Minecraft Education or its Preview).
      • The Android app runs in Waydroid, shown in a Cage window.
      • Tick Settings → Full screen to open it truly full screen with Gamescope.
      • Sign in inside the app with your school's Microsoft 365 Education account.
      • The instance's Setup tab shows what's ready.
        • Set up Waydroid opens a terminal that installs Waydroid, Cage and Gamescope and downloads Android with Google Play. You type your password there, once.
        • Open Google Play lets you install the app.
        • Install APK… installs one you already have.
      • When you close the game, Waydroid stops so it doesn't keep using memory.
  • Jace Launcher 1.6.11.6.1release
    windowsmacoslinux
    7 days ago · 8 downloads
    ↗ Windows (258 MB)↗ macOS (Apple Silicon) (207 MB)↗ macOS (Intel) (230 MB)↗ Linux (263 MB)
    Changelog
    • Bedrock 1.21.120 and newer start now. They crashed with cannot locate symbol "pthread_sigmask". Jace Launcher now loads the same mods as the Minecraft Bedrock Launcher's own Play button, including its required "mcpelauncher-updates" fix-up mod.
    • The first time, the Minecraft Bedrock Launcher may ask whether that mod can use your Google Play sign-in (for the license check). Allow it to play.
  • Jace Launcher 1.6.01.6.0release
    windowsmacoslinux
    7 days ago · 8 downloads
    ↗ Windows (251 MB)↗ macOS (Apple Silicon) (207 MB)↗ macOS (Intel) (230 MB)↗ Linux (263 MB)
    Changelog
    • Bedrock instances: Minecraft Bedrock now works like a normal instance, and the separate Bedrock tab is gone.
      • Library → New instance → Mod loader: Bedrock, then pick a Bedrock version. Play starts that version.
      • Each Bedrock instance has its own worlds and packs, a Worlds and a Packs tab, its own window size, icon and shortcut.
      • You don't need a Microsoft account. Bedrock uses the Google Play account in the Minecraft Bedrock Launcher.
      • Download versions… (in New instance and in the instance's Settings) opens the Minecraft Bedrock Launcher: sign in to Google Play and download versions there. If it isn't installed, Install Bedrock launcher installs it.
    • Change version: every instance's Settings has a version picker now, for Java (with the matching loader version) and Bedrock. Java game files download on the next Play.
    • Browse: with a Bedrock instance under Install into, Browse shows Jace Store's Minecraft Bedrock section (add-ons, texture packs, worlds, skin packs, world templates) and installs into that instance.
  • Jace Launcher 1.5.01.5.0release
    windowsmacoslinux
    7 days ago · 8 downloads
    ↗ Windows (258 MB)↗ macOS (Apple Silicon) (207 MB)↗ macOS (Intel) (225 MB)↗ Linux (263 MB)
    Changelog
    • Minecraft Bedrock (new 🟩 Bedrock page):
      • Linux and macOS: one click installs the Minecraft Bedrock Launcher: from Flathub on Linux, the Mac app on macOS. Play Bedrock starts it, and Update keeps it current. It runs the Android version of Bedrock, so you need to own Minecraft on Google Play. You sign in with Google in its own window; Jace Launcher never sees your Google account.
      • Windows: Play Bedrock opens Minecraft from the Microsoft Store / Xbox app.
      • Worlds and Packs tabs list your Bedrock worlds and resource, behavior and skin packs, and let you delete them.
      • Import file… adds .mcpack, .mcaddon, .mcworld and .mctemplate files. A newer copy of a pack replaces the old one, and files that try to write outside Minecraft's folder are refused.
      • Jace Store tab: search and install from Jace Store's new Minecraft Bedrock section: add-ons, texture packs, worlds, skin packs and world templates.
  • Jace Launcher 1.4.51.4.5release
    windowsmacoslinux
    8 days ago · 13 downloads
    ↗ Windows (251 MB)↗ macOS (Apple Silicon) (207 MB)↗ macOS (Intel) (230 MB)↗ Linux (263 MB)
    Changelog
    • Linux: Jace Launcher shows up only once in your app menu. AppImageLauncher used to add a second "Jace Launcher (1)" entry. The AppImage now tells it not to, and Jace Launcher removes any such duplicate when it starts.
  • Jace Launcher 1.4.41.4.4release
    windowsmacoslinux
    8 days ago · 16 downloads
    ↗ Windows (252 MB)↗ macOS (Apple Silicon) (207 MB)↗ macOS (Intel) (230 MB)↗ Linux (263 MB)
    Changelog
    • Linux: fixed a crash when clicking Add Microsoft account, in setup and in the launcher. This happened on newer distros (Arch, CachyOS, Fedora…), especially on Wayland. The AppImage shipped an older copy of some system libraries, which broke the graphics drivers, and the Microsoft sign-in page couldn't start. It now uses your system's own, so hardware graphics work again too.
  • Jace Launcher 1.4.31.4.3release
    windowsmacoslinux
    9 days ago · 14 downloads
    ↗ Windows (252 MB)↗ macOS (Apple Silicon) (207 MB)↗ macOS (Intel) (230 MB)↗ Linux (266 MB)
    Changelog
    • Windows setup no longer closes when you add a Microsoft account. When the Microsoft sign-in page started loading, Windows rebuilt the setup window to draw the page, which hid setup and ended it. The sign-in window is now a separate window, so setup stays open.
    • crash.log also records how setup ended and why the app quit.
  • Jace Launcher 1.4.11.4.1release
    windowsmacoslinux
    9 days ago · 13 downloads
    ↗ Windows (251 MB)↗ macOS (Apple Silicon) (207 MB)↗ macOS (Intel) (230 MB)↗ Linux (266 MB)
    Changelog
    • Windows: fixed a crash after signing in with Microsoft, including in the setup wizard. The sign-in window now closes its built-in browser safely.
    • Crash log: if something goes wrong, Jace Launcher shows the error and saves the details to crash.log in its data folder (%APPDATA%\.jacelauncher on Windows), instead of just closing.
  • Jace Launcher 1.4.01.4.0release
    windowsmacoslinux
    9 days ago · 13 downloads
    ↗ Windows (258 MB)↗ macOS (Apple Silicon) (207 MB)↗ macOS (Intel) (230 MB)↗ Linux (266 MB)
    Changelog
    • Voice channels and group calls from the Jace Social mod: join a server's voice channel or a group chat's call in game. Everyone in it connects to everyone, like in the Jace Social app. The call bar here shows it too, with Mute, Deafen and Leave.
    • Camera and screen sharing in calls and voice channels: 📷 Camera and 🖥️ Share screen in the call bar (or in game) send your camera or your main screen. People see them in Jace Social; the launcher stays voice-only for what others send, and Watch in Jace Social opens it there.
    • Several people talking at once are mixed together.
    • Fixes calls breaking when you turned something on mid-call after answering someone using a browser.
  • Jace Launcher 1.3.21.3.2release
    windowsmacoslinux
    9 days ago · 12 downloads
    ↗ Windows (258 MB)↗ macOS (Intel) (225 MB)↗ macOS (Apple Silicon) (207 MB)↗ Linux (266 MB)
    Changelog
    • Calls with video: when the friend you're calling turns on their camera or shares their screen, the call bar says so and shows Watch in Jace Social. That moves the call to Jace Social in your browser, where you can see it; they don't have to do anything. The Jace Social mod gets the same button (mod 1.4.1).
    • Calls keep working when the other person turns their camera or screen sharing on and off. The launcher stays voice-only and doesn't download their video.
    • Fixes calls with someone who moves the call to another device.
  • Jace Launcher 1.3.11.3.1release
    windowsmacoslinux
    10 days ago · 12 downloads
    ↗ Windows (252 MB)↗ macOS (Apple Silicon) (207 MB)↗ macOS (Intel) (230 MB)↗ Linux (266 MB)
    Changelog
    • Jace Social mod 1.4 and later: your friends see the mod's in-game status again. The mod's files are now named jace_social_…jar, and the launcher didn't recognise them.
    • Server add-ons: LuckPerms is no longer offered on Fabric and Quilt. There it only runs on dedicated servers, so it did nothing in worlds you host. The Jace Social mod's own permissions do that job (Host world → Permissions).
  • Jace Launcher 1.3.01.3.0release
    windowsmacoslinux
    11 days ago · 12 downloads
    ↗ Windows (251 MB)↗ macOS (Apple Silicon) (207 MB)↗ macOS (Intel) (230 MB)↗ Linux (266 MB)
    Changelog
    • Jace Social: the friends system is now its own project, with a web app and a desktop app at https://jace-deb.github.io/jace-social/. The in-game mod is now called Jace Social too.
    • No more "Sign in to Jace Social" button: friends and chat sign in automatically with your Microsoft Minecraft account at startup, and when you add or switch accounts.
    • Settings → Jace Social → Link Jace: link your Jace account, so you can sign in to Jace Social on the web and in the desktop app. Your friends, chats and servers are the same everywhere.
    • Friends now see more of what you're doing while you play from Jace Launcher: your mod loader, modpack and how long you've been playing.
  • Jace Launcher 1.2.11.2.1release
    windowsmacoslinux
    12 days ago · 12 downloads
    ↗ Windows (258 MB)↗ macOS (Apple Silicon) (207 MB)↗ macOS (Intel) (225 MB)↗ Linux (260 MB)
    Changelog
    • Voice calls on older Macs: fixed "Voice calls aren't available in this build" on macOS 12 and 13. Some libraries in 1.2.0 needed macOS 14 (Apple Silicon) or macOS 15 (Intel).
  • Jace Launcher 1.2.01.2.0release
    windowsmacoslinux
    12 days ago · 12 downloads
    ↗ Windows (251 MB)↗ macOS (Apple Silicon) (202 MB)↗ macOS (Intel) (223 MB)↗ Linux (260 MB)
    Changelog
    • Voice calls with friends: click 📞 Call in a friend's chat. Audio goes directly between you, or through a relay when your networks don't allow a direct connection. While you play, the Jace Friends mod can start, answer, mute and hang up calls. That needs the game to be started from Jace Launcher.
    • Server add-ons (an instance's Mods tab): one-click LuckPerms, WorldEdit, Chunky, spark and Ledger for worlds you host for friends.
    • Jace Store dependencies: when a Jace Store mod lists dependencies (on Jace Store or Modrinth), they're installed with it.
    • Jace Friends mod now supports every release from 1.20.1 to 26.3 on Fabric/Quilt, NeoForge and Forge, with a Host world button and roles (Visitor / Builder / Admin) for friends who join.
  • Jace Launcher 1.1.01.1.0release
    windowsmacoslinux
    13 days ago · 12 downloads
    ↗ Windows (209 MB)↗ macOS (Apple Silicon) (170 MB)↗ macOS (Intel) (188 MB)↗ Linux (214 MB)
    Changelog
    • Synced friends list: your friends are tied to your Minecraft account through Jace Social, so they follow you to any computer. Add friends by username, even if they haven't used Jace Launcher yet; they'll see your request when they sign in.
    • Chat with friends, with live notifications and unread badges.
    • See what friends are doing: online, playing a version or server, or hosting a world. Click Join to play with them; the launcher picks an instance with the right Minecraft version.
    • Jace Friends mod for Minecraft 26.3 (on Jace Store): friends list and chat in game (press J), plus "Host this world for friends" with e4mc.
    • Sign-in is verified by Mojang and needs a Microsoft account.
    • Jace Store in Browse: search and install mods, modpacks, resource packs and shaders from Jace Store. Files are checked against the store's SHA-1, Store mods count in Check for updates, and hand-added Store files get the Delete button.
    • Dependencies from the mod itself: required mods listed in a jar's fabric.mod.json, quilt.mod.json or mods.toml are installed automatically from Modrinth. This covers Jace Store mods and jars you add by hand.
  • Jace Launcher 1.0.91.0.9release
    windowsmacoslinux
    13 days ago · 12 downloads
    ↗ Windows (209 MB)↗ macOS (Apple Silicon) (169 MB)↗ macOS (Intel) (187 MB)↗ Linux (213 MB)
    Changelog
    • Browse: mods, resource packs and shaders already in the selected instance show a Delete button instead of Install. This includes ones you added by hand.
    • Synced folders: share worlds, resource packs, shaders, screenshots and schematics between instances. Move the shared folder into Dropbox, OneDrive or Google Drive to sync between computers.
    • Settings → About with the version, "Made by jace.deb" and the GitHub link.
    • The project moved to github.com/jace-deb/jace-launcher. Update checks follow the move.
  • Jace Launcher 1.0.81.0.8release
    windowsmacoslinux
    13 days ago · 12 downloads
    ↗ Windows (209 MB)↗ macOS (Apple Silicon) (169 MB)↗ macOS (Intel) (187 MB)↗ Linux (213 MB)
    Changelog
    • Mod updates: Check for updates on an instance's Mods tab also works for mods you added by hand. Update all installs them.
    • Missing required dependencies are installed automatically when you install a mod, add a jar, or check for updates.
    • The icon builder opens instantly.
  • Jace Launcher 1.0.71.0.7release
    windowsmacoslinux
    13 days ago · 12 downloads
    ↗ Windows (209 MB)↗ macOS (Apple Silicon) (169 MB)↗ macOS (Intel) (187 MB)↗ Linux (213 MB)
    Changelog
    • The Windows version now runs under Wine/Bottles. It was failing with "DLL load failed while importing QtCore".
    • Instance shortcuts: add a desktop or Start menu shortcut that starts an instance straight away.
    • Per-instance window size.
    • Custom instance icons, plus an icon builder with shapes, gradients, text, symbols and Minecraft block or item textures. Modpacks use their own icon.
  • Jace Launcher 1.0.61.0.6release
    windowsmacoslinux
    13 days ago · 12 downloads
    ↗ Windows (217 MB)↗ macOS (Apple Silicon) (169 MB)↗ macOS (Intel) (187 MB)↗ Linux (213 MB)
    Changelog
    • Windows: the Microsoft Visual C++ runtime is now bundled.
  • Jace Launcher 1.0.51.0.5release
    windowsmacoslinux
    13 days ago · 12 downloads
    ↗ Windows (217 MB)↗ macOS (Apple Silicon) (169 MB)↗ macOS (Intel) (187 MB)↗ Linux (213 MB)
    Changelog
    • Installing is required: the downloaded app runs the setup wizard. Cancelling closes it.
    • Friends list: add friends by username, see their skin, see when they're online on their server, and join them in one click.
    • Old 64×32 skins like Notch's now show the right face.
  • Jace Launcher 1.0.41.0.4release
    windowsmacoslinux
    13 days ago · 12 downloads
    ↗ Windows (217 MB)↗ macOS (Apple Silicon) (169 MB)↗ macOS (Intel) (187 MB)↗ Linux (213 MB)
    Changelog
    • One-click updates on every platform.
    • Windows is now a single self-installing .exe with a setup wizard: Start menu, desktop shortcut and "Installed apps" entry.
  • Jace Launcher 1.0.31.0.3release
    windowsmacoslinux
    13 days ago · 15 downloads
    ↗ Windows (installer) (144 MB)↗ Windows (portable) (213 MB)↗ macOS (Apple Silicon) (169 MB)↗ macOS (Intel) (187 MB)↗ Linux (213 MB)
    Changelog
    • macOS ships as Jace Launcher.app instead of a disk image.
  • Jace Launcher 1.0.21.0.2release
    windowsmacoslinux
    13 days ago · 15 downloads
    ↗ Windows (installer) (144 MB)↗ Windows (portable) (213 MB)↗ macOS (Apple Silicon) (203 MB)↗ macOS (Intel) (219 MB)↗ Linux (213 MB)
    Changelog
    • macOS setup wizard: installs to Applications and adds the app to the Dock and desktop.
  • Jace Launcher 1.0.11.0.1release
    windowsmacoslinux
    13 days ago · 15 downloads
    ↗ Windows (installer) (144 MB)↗ Windows (portable) (213 MB)↗ macOS (Apple Silicon) (212 MB)↗ macOS (Intel) (220 MB)↗ Linux (213 MB)
    Changelog
    • Fixed the macOS app quitting at launch on macOS 12 Monterey.
  • Jace Launcher 1.0.01.0.0release
    windowsmacoslinux
    13 days ago · 17 downloads
    ↗ Windows (installer) (144 MB)↗ Windows (portable) (213 MB)↗ macOS (Apple Silicon) (220 MB)↗ macOS (Intel) (229 MB)↗ Linux (213 MB)
    Changelog
    • First release: every Java Edition version, with Fabric, Quilt, Forge, NeoForge and Legacy Fabric.
    • Automatic Java, isolated instances, and Modrinth and CurseForge browsing.
    • Skin and cape changer, plus Microsoft and offline accounts.
    • The macOS build in this version needs macOS 13 or newer.