Shrinks Minecraft: Java Edition resource and data packs into one ZIP. A single-binary alternative to PackSquash that never rejects a file: overlays, extra files and unusual layouts are kept.
| Minebox resource pack | Size | Time |
|---|---|---|
| Original | 95.0 MB | |
| PackSquash | 68.4 MB | 124 s |
| compack | 65.6 MB | 13 s |
Download a binary from Releases (Linux, macOS, Windows), or:
go install github.com/qore-games/compack@latestThe tools compack runs (oxipng, OptiVorbis, pngquant, oggshrink) are embedded in the binary. Linux arm64 has no pngquant build, so PNGs stay lossless there.
compack ./my-pack -out pack.zip # a pack folder
compack ./my-pack.zip -out pack.zip # or a .zip
compack -skip-png-quant ./my-pack # lossless PNGs only
compack -config compack.yml ./my-pack # settings from a fileIt ends with the output's size and SHA-1, the hash resource-pack-sha1 in
server.properties expects. The same input and settings always give the same
bytes.
Every flag and config.yml key, the -events JSON output, -cache and the
ZIP format: docs/configuration.md.
| Files | |
|---|---|
.png |
8-bit palette with pngquant (lossy, skipped for textures using their alpha channel), then oxipng |
.ogg |
OptiVorbis: same audio, smaller container, metadata removed. -ogg-lossy re-encodes first (−8% on Minebox, opt-in) |
.json .mcmeta |
minified, comments removed |
.vsh .fsh .glsl .lang .properties |
comments and blank lines removed |
| everything else | kept as is |
Identical files share one entry, and the ZIP keeps only what Minecraft reads.
7-Zip cannot open the result unless you pass -zip-local-names.
Pick a pack, choose Lossless, Balanced or Smallest (or set each option), press
Pack: the window shows the progress, then the size saved and the SHA-1.
Paths and options are remembered. Download it from
Releases; on Linux the file
dialogs need zenity or kdialog (or paste the paths).
Also available online: mineassets.com/tools/compack.
go build -o compack . # the CLI
go test ./...
cd app # the desktop app (Native SDK)
./dev.sh # run it, markup hot reload
./build.sh build # release build in zig-out/bin/
node --test test/core.test.mjs # core testsChanges: CHANGELOG.md. Issues and pull requests are welcome, new optimizers especially.