PolyMC

Launcher by PolyMC

Manage multiple game installations from one simple launcher.

DownloadCheck a file you have

Note from Modgrade

On 17 October 2022, the owner of PolyMC removed its other maintainers from the project. They then started Prism Launcher from the same code. Source: Prism Launcher's FAQ .

How we got this result

  1. Files checkedWe compare the fingerprint and the content of each file with the malware we and others have found, and look at what is inside it.13 of 13 official filesLast checked on 3 Nov 2026
  2. Deep checkOur own tools read the code of each current file and look for what harmful code does, like stealing logins or running hidden programs.11 of 13 official filesLast checked on 3 Nov 2026
  3. Passed Nothing harmful found in its 13 official files.Our checks look for known signs of harm. They cannot prove that a file is harmless.

At a glance

Download
Official files for Windows, macOS and Linux.
Fake sites
1 fake site found.
Privacy
Not read.
Releases
Latest release on 3 Oct 2026.

Every official file

See each file in Releases

The files of version 8.1, by system and kind of download.

SystemInstallerPortableArchiveAppImage
WindowsPolyMC-Windows-Setup-amd64-8.1.exePassedInstallerFile checked on 2 Nov 2026Deep check on 2 Nov 2026PolyMC-Windows-Portable-amd64-8.1.zipPassedPortableFile checked on 2 Nov 2026Deep check on 2 Nov 2026PolyMC-Windows-amd64-8.1.zipPassedArchiveFile checked on 2 Nov 2026Deep check on 2 Nov 2026No file
WindowsArmPolyMC-Windows-Setup-aarch64-8.1.exePassedInstaller, ArmFile checked on 2 Nov 2026Deep check on 2 Nov 2026PolyMC-Windows-Portable-aarch64-8.1.zipPassedPortable, ArmFile checked on 2 Nov 2026Deep check on 2 Nov 2026PolyMC-Windows-aarch64-8.1.zipPassedArchive, ArmFile checked on 2 Nov 2026Deep check on 2 Nov 2026No file
Windowsolder systemsPolyMC-Windows-Setup-Legacy-amd64-8.1.exePassedInstaller, older systemsFile checked on 2 Nov 2026Deep check on 2 Nov 2026PolyMC-Windows-Legacy-Portable-amd64-8.1.zipPassedPortable, older systemsFile checked on 2 Nov 2026Deep check on 2 Nov 2026PolyMC-Windows-Legacy-amd64-8.1.zipPassedArchive, older systemsFile checked on 2 Nov 2026Deep check on 2 Nov 2026No file
macOSNo fileNo filePolyMC-macOS-8.1.tar.gzPassedArchiveFile checked on 2 Nov 2026Deep check on 2 Nov 2026No file
macOSolder systemsNo fileNo filePolyMC-macOS-Legacy-8.1.tar.gzPassedArchive, older systemsFile checked on 2 Nov 2026Deep check on 2 Nov 2026No file
LinuxNo fileNo fileNo filePolyMC-Linux-amd64-8.1.AppImagePassedAppImageFile checked on 2 Nov 2026
LinuxArmNo fileNo fileNo filePolyMC-Linux-aarch64-8.1.AppImagePassedAppImage, ArmFile checked on 3 Nov 2026
PassedDeep checkNo file

Have a copy of PolyMC? Check that it is the official one.

Drop it here. We compare its fingerprint with the official PolyMC files and the files of the fake sites we know.

Source code
Public on GitHub
Official site
polymc.org

Which file for my computer?

PolyMC-Windows-Setup-amd64-8.1.exe

PassedNo harmful code foundReleased 3 Oct 202640.0 MB

Download

The same file we checked, straight from github.com.

Official site

1 site uses its name to give other files. See Fake sites

Download page
polymc.org/download
Newest version
8.1, released on 3 Oct 2026

Passed

Nothing harmful found in its 13 official files, version 8.1.

Our checks look for known signs of harm. They cannot prove that a file is harmless.

What we checked

A launcher runs on your computer like any program, and it downloads the game and its mods, so harmful code in it can steal your accounts or files.

Files checkedEach official file is downloaded on a separate machine, opened with every file inside it and never run. ClamAV, a free antivirus, and our YARA rules look for known signs of harm in all of it.
13 of its 13 official files, with every file inside them.Last checked on 3 Nov 2026
Deep checkOur own tools read the Java code in the files and look for what harmful code does, like stealing logins or running hidden programs. They read Java code only.
11 of its 13 official files. 2 hold no Java code: programs made for one system.
Same as listedA fingerprint of the file. The same fingerprint means the same file, byte for byte.
Every file we checked has the SHA-256 that GitHub gives.
Older releases
13 official files of 1 older release, every one checked.

What we found

What its Java code can do. None of this is harmful by itself: many launchers and mods do the same.

Can connect to the internet
It has code that can go online, for example to check for updates, sign you in or download the game. What it sends is in Privacy.In all 11 files whose Java code we read

What is inside

The 62 files inside PolyMC-Windows-Setup-amd64-8.1.exe.

Jar files inside
2 files.
Programs for Windows, Mac or Linux
58 files.
Graphics
None.
Other
2 files.

Every file

  • $PLUGINSDIR/4 files
    • modern-wizard.bmp26 KB
    • nsDialogs.dll14 KB
    • nsExec.dll9.5 KB
    • System.dll25 KB
  • iconengines/1 file
    • qsvgicon.dll67 KB
  • imageformats/8 files
    • qgif.dll39 KB
    • qicns.dll52 KB
    • qico.dll43 KB
    • qjp2.dll46 KB
    • qjpeg.dll65 KB
    • qsvg.dll31 KB
    • qwbmp.dll29 KB
    • qwebp.dll38 KB
  • jars/2 files
    • JavaCheck.jar1.1 KB
    • NewLaunch.jar17 KB
  • platforms/1 file
    • qwindows.dll1484 KB
  • styles/1 file
    • qmodernwindowsstyle.dll294 KB
  • tls/3 files
    • qcertonlybackend.dll109 KB
    • qopensslbackend.dll382 KB
    • qschannelbackend.dll304 KB
  • libb2-1.dll34 KB
  • libbrotlicommon.dll140 KB
  • libbrotlidec.dll61 KB
  • libbz2-1.dll106 KB
  • libdouble-conversion.dll76 KB
  • libfreetype-6.dll772 KB
  • libgcc_s_seh-1.dll146 KB
  • libglib-2.0-0.dll1534 KB
  • libgraphite2.dll163 KB
  • libharfbuzz-0.dll1560 KB
  • libiconv-2.dll1116 KB
  • libicudt78.dll32345 KB
  • libicuin78.dll3112 KB
  • libicuuc78.dll1953 KB
  • libintl-8.dll292 KB
  • libjasper.dll455 KB
  • libjpeg-8.dll945 KB
  • libmd4c.dll92 KB
  • libpcre2-16-0.dll631 KB
  • libpcre2-8-0.dll690 KB
  • libpng16-16.dll254 KB
  • libquazip1-qt6.dll291 KB
  • libsharpyuv-0.dll52 KB
  • libstdc++-6.dll2597 KB
  • libwebp-7.dll732 KB
  • libwebpdemux-2.dll25 KB
  • libwebpmux-3.dll81 KB
  • libwinpthread-1.dll65 KB
  • libzstd.dll1190 KB
  • polymc.exe11934 KB
  • qt.conf1 B
  • Qt6Charts.dll1992 KB
  • Qt6Core.dll6986 KB
  • Qt6Core5Compat.dll397 KB
  • Qt6Gui.dll10383 KB
  • Qt6Network.dll2111 KB
  • Qt6OpenGL.dll616 KB
  • Qt6OpenGLWidgets.dll62 KB
  • Qt6Svg.dll678 KB
  • Qt6Widgets.dll7643 KB
  • Qt6Xml.dll159 KB
  • zlib1.dll125 KB

Not read

We have not read its Java code yet.

What we checked

A launcher can send information about you over the internet, such as your player name or your login.

Deep checkWe read the code and list each web address it can contact, and what it sends. We leave out code that is never used.
The Java code of all 11 files that hold some. See each file in Releases
Also named in its codeAddresses written in its code that no code we read contacts: a link shown to you, a default setting, or code we could not follow.
www.minecraft.net

Releases

Current files 13All releases 26

Current files: the official files of version 8.1.

Current fileVersionSystemReleasedFileOur checkGet it on
8.1macOSArchive, older systems3 Oct 2026PolyMC-macOS-Legacy-8.1.tar.gz18.8 MB SHA-256 ff7c855e91…PassedNo harmful code found. Checked on 2 Nov 2026.2 Nov 2026
1 of 13 current files

A fake site uses the name of PolyMC to offer its download from an address that is not the official one.

How to know the official site

Official site
polymc.org
Files come from
github.com/PolyMC
SHA-256A fingerprint of the file. The same fingerprint means the same file, byte for byte.
PolyMC-Windows-Setup-amd64-8.1.exe51c2e3d69a446111d356f2e2953d3baa8b9563d3f4e7f630c1524ecf1735ed63Every official file and its SHA-256, in Releases

The 1 fake site we foundChecked on 4 Nov 2026

Of these, it gives no file we could get. Sites in one fold share their pages and their download.

polymc.ruNo file we could getIts buttons lead to PolyMC's own GitHub files.Online

On the same server and with the same page layout as prismlauncher.ru. Russian pages.

Its buttons lead to PolyMC's own GitHub files, of an older version (7.1).

  • polymc.ruOnline. Its buttons lead to PolyMC's own GitHub files.Registration date not public · Checked 4 Nov 2026

Its download

Its buttons lead to PolyMC's own GitHub files.

If you downloaded a file from one of these sites

  1. Drop the file in the Scanner. It tells you if it is an official file of PolyMC or a file of these sites.
  2. If it is not an official file and you have not opened it, delete it.
  3. If you opened it: run a full scan with your antivirus. On Windows, the built-in one is Microsoft Defender, in the Windows Security app.
  4. If you signed in to the launcher it installed: use "sign out everywhere" in your Microsoft security settings and change your Microsoft account password.
  5. Get PolyMC from its official site, polymc.org .
Downloads
1.2MOn GitHub, all releases
Created
17 Dec 2021Its GitHub repository
Latest release
3 Oct 2026Version 8.1
License
GPL-3.0 Public on GitHub

About

PolyMC is an open-source Minecraft launcher for managing separate game instances, accounts, and mods, with an emphasis on simplicity, stability, and user freedom. Each instance keeps its own folder for mods, resource packs, and other files, so you can use different setups without mixing them or risking a world by opening it in an older game version. The launcher can install and launch modpacks, and lets you download or update individual mods from Modrinth and CurseForge. Its lightweight Qt interface supports customizing the instance window and theme.

Written from its official pages: its GitHub page and polymc.org . How we write it