Skip to content

Polymer PackSquash

PackSquash runner for polymer resource packs!

Fabric
Loaders
Fabric
Downloads on Modrinth
2K
Followers on Modrinth
8
versions
5
Updated
March 29, 2026Mar 29
Published
in 2025

At a glance

Runs on Fabric
For Minecraft 1.21.6–26.1.2
Server only — players don't need to install it
Latest version — 1.1.2+26.1 from March 29, 2026
Requires Polymer
License LGPL-3.0-only — free
Where it's needed
In gamenot neededOn serverrequired

Install on the server only; players don't need it

Game versions1.21.6–26.1.2

Polymer PackSquash Integration

This mod integrates PackSquash with Polymer’s resource pack generation to automatically optimize generated resource packs so you don't have to manually compress after changes.

Setup

  • Get the latest PackSquash release.
  • Place the binary here:

    polymer/packsquash
  • The mod will automatically create a packsquash.toml in the polymer folder.

These are the default paths the mod will use. You can adjust them in the configuration file config/polymer-squasher.json

Default config

{
  "enabled": true,
  "log-packsquash": false,
  "log-hash-mismatch": false,
  "force-size-based-hash": false,
  "cleanup": false,
  "ignore-hash-paths": [
    "polymer-credits.txt"
  ],
  "packsquash-path": "polymer/packsquash",
  "packsquash-toml-path": "polymer/packsquash.toml",
  "hash-file-path": "polymer/hashes.json",
  "resource-pack-directory": "polymer/pack",
  "minified-zip-path": "polymer/resource_pack.min.zip"
}

Config options

  • enabled — turn the integration on/off.
  • log-packsquash — print PackSquash output to the log.
  • log-hash-mismatch — log when a file’s hash changes (useful for debugging).
  • packsquash-path — path to the PackSquash binary.
  • packsquash-toml-path — path to the PackSquash TOML config file.
  • ignore-hash-paths — list of path prefixes to ignore hash mismatches when hashing.
  • force-size-based-hash — if true, the mod will use file size instead of a full hash (faster, less precise)
  • cleanup - cleans up old files in the cached pack folder

How it works

When enabled, the mod will hash the generated resource pack files. The hashes are written to polymer/hashes.json.

If nothing has changed since the last run, PackSquash is skipped.

If changes are detected, the mod will run PackSquash after Polymer finishes generating the resource pack.

If the process completes successfully, the optimized version is used instead.


patreon

FAQ

How to install Polymer PackSquash?

Install Fabric for your Minecraft version, download Polymer PackSquash for the same version and loader, put the file into the mods folder and launch the game with the loader profile.

Which Minecraft versions does Polymer PackSquash support?

Polymer PackSquash has builds for Minecraft 1.21.6–26.1.2.

Is Polymer PackSquash needed on the server?

Server only — players don't need to install it

License and source
GNU Lesser General Public License v3.0 onlyfree to use and share; changes to the mod itself must be published under the same license
Original — Modrinth↗Files unchanged, verified with SHA-512Is this your mod? For rights holders

The site uses cookies: the necessary ones for sign-in and the theme, plus the Yandex Metrica and LiveInternet visit counters — they show us how the site is used. We have no advertising cookies. More