ModsFinder

Packwiz Modpack Loader

by EvieTheOwl

Packwiz Modpack Loader is a Fabric and Quilt library that reads a modpack's pack.toml and keeps the server's modpack in sync with it.

FabricQuiltServer-side onlyMIT LicenseOpen source1.19 – 1.21.10

What it does

A server owner gives the mod a pack.toml URL, and it loads the modpack from that link. Updates are applied with the packwiz update command, and the mod can also load automatic updates for the pack. The command that triggers updates is restricted by a permission level, which defaults to 4 (operator); owners can lower it so regular players at level 0 or creative players at level 2 may run it.

The mod is server-side only, so players join the server without installing anything. It is released under the MIT License and is open source, with the source code and issue tracker publicly linked. Builds exist for Fabric and Quilt across 21 release versions, 1.19 – 1.21.10, and the latest file is 3.1.0+1.21.4 for 1.21.10.

Key features

  1. Modpack loading from a URL

    The server reads a Packwiz modpack from a pack.toml link, so the pack is set up without copying mod files by hand.

  2. Packwiz update command

    Running packwiz update applies changes from the linked pack to the server.

  3. Automatic updates

    The mod can load updates for the modpack automatically, keeping the server in step with its pack.

  4. Permission level setting

    The minimum permission level for the update command is configurable, with 4 as the default.

Compatibility

Latest build for each game version and loader.

1.21.x9 of 9 versions with builds
1.21.103.1.0+1.21.43.1.0+1.21.4
1.21.93.1.0+1.21.43.1.0+1.21.4
1.21.83.1.0+1.21.43.1.0+1.21.4
1.21.73.1.0+1.21.43.1.0+1.21.4
1.21.63.1.0+1.21.43.1.0+1.21.4
1.21.53.1.0+1.21.43.1.0+1.21.4
1.21.43.1.0+1.21.43.1.0+1.21.4
1.21.13.1.0+1.193.1.0+1.19
1.213.1.0+1.193.1.0+1.19
1.20.x7 of 7 versions with builds
1.20.63.1.0+1.193.1.0+1.19
1.20.53.1.0+1.193.1.0+1.19
1.20.43.1.0+1.193.1.0+1.19
1.20.33.1.0+1.193.1.0+1.19
1.20.23.1.0+1.193.1.0+1.19
1.20.13.1.0+1.193.1.0+1.19
1.203.1.0+1.193.1.0+1.19
1.19.x5 of 5 versions with builds
ReleaseBetaAlphaNot available

Only full game releases are shown. This mod publishes no snapshot builds.

Use cases

Keeping a server pack current

A server owner who maintains a Packwiz modpack can link it once and let updates arrive from the pack source.

Delegating updates

Lowering the permission level lets trusted regular players or creative players run the update command.

Who it’s for: Server owners who distribute their modpack as a Packwiz pack and want updates applied on the server side.

Questions

Does Packwiz Modpack Loader need to be installed on players' clients?

No. The mod is server-side only, so only the server needs it.

Which loaders does Packwiz Modpack Loader support?

It is built for Fabric and Quilt, with files for 1.19 – 1.21.10.

Who can run the packwiz update command by default?

The default minimum permission level is 4, which is operator. The level can be changed to let lower-level players run it.

In the catalog

Packwiz Modpack Loader is one of 3,514 Library mods on ModsFinder, and one of 2,348 Library mods for Fabric. 15,569 mods support Minecraft 1.21.10.

Library mods3,514Fabric modsMods for 1.21.1015,569

More from EvieTheOwl

All projects
Create Configured1.21.1

Similar mods

Fabric API1.14 – 26.3Cloth Config API1.14 – 26.3YetAnotherConfigLib (YACL)1.19 – 26.3Architectury API1.16.5 – 26.3Just Enough Items (JEI)1.8 – 26.3Geckolib1.12.2 – 26.3

What the author says

Loads and (auto) updates Packwiz Modpacks. If you are not sure what constitutes a "substantial portion" of the Software, please submit an issue for clarification.
EvieTheOwl, on the Modrinth page

Official listing

Owner
EvieTheOwl
Published
2023-09-15
Updated on Modrinth
2025-12-20
Facts verified
2026-10-15

Tags

LibraryManagementUtility
Open on ModrinthCompare