Questions from players
Questions about making mods are in the FAQ for mod developers.
Which mods can I use?
| Mods | Status |
|---|---|
| Fabric mods | Supported |
| Forge mods | Supported, also next to Fabric mods |
| Quilt mods | Supported on Minecraft 26.1, 26.1.2 and 26.2, also next to Fabric and Forge mods. Mods that need the Quilt Standard Libraries are left out: those libraries have no release for 26.x |
| NeoForge mods | Not supported yet. They are left out, and the log says why |
| Poly Mods (made for Poly Mod Loader) | Supported |
What was tested with which mods is in Compatibility.
Which Minecraft versions does it run?
Poly Mod Loader 0.2.0-beta.3 runs Minecraft 26.1, 26.1.1, 26.1.2, 26.2. Older versions such as 1.20.1 or 1.21.1 are not supported. See Supported versions and loaders.
Do I also need Fabric Loader, Quilt Loader or Forge?
No. Install only Poly Mod Loader. It provides the Fabric Loader and Quilt Loader APIs itself and runs Forge itself. The first start with a Forge mod downloads Forge's files, so it needs an internet connection.
What happens to a mod that cannot run?
It is left out before the game starts, and your other mods still start. The reason, with a POLY-… code, is in logs/latest.log and in .poly/startup-report.json in the launcher folder. Error codes explains each code.
Will every mod work?
That is not guaranteed. The tests check that popular mods load together, open or create a world, and save. The features of each mod were not checked one by one.
Does it back up my worlds?
Partly. Before loading a world, Poly Mod Loader makes the game's own backup (a zip in backups/) if Poly Mods were removed or changed version since the world was last played. Fabric and Forge mods are not part of this check, so back up worlds you care about yourself before you remove or update those mods.
Can I run it on a server?
Yes. The same installer sets up a dedicated server, which needs Java 25 or newer. You accept the Minecraft EULA yourself. A mod that both the server and the players use needs the same version on both sides. See Dedicated server.
Windows warns me when I open the installer.
The installer is not code-signed yet, so Windows SmartScreen may warn you the first time. If you downloaded it from the download page or the GitHub release, click More info → Run anyway.
How do I remove it?
Click Uninstall in the installer, or run java -jar PolyModLoader-<version>.jar uninstall. This removes the Poly Mod Loader version, its launcher profile and its files. Your mods/ folder and your worlds stay.
Something went wrong.
See If something goes wrong in the install guide. If that does not help, report the bug with the error code and a link to logs/latest.log.