Ultimate ICE

BWT + context mixing + online neural network

Ultimate ICE

Archive Compressor

Windowsx64 installer Linuxx64 .deb package Coming soon macOSApple silicon & Intel

Free · Command line + desktop app · Reads zip, 7z, rar, tar

Desktop app

Modern design

Ultimate ICE desktop app: home screen with Compress and Decompress cards, the compress screen with tier selection, and the decompress screen with an archive preview

Three screens and nothing in the way: drop files to compress or an archive to thaw, pick a tier, and watch it work. A live log, an archive preview before you extract, and a progress ring that means it.

Silesia corpus · 211.9 MB · 12 files

Smaller than 7-Zip. Faster too.

CompressorArchiveSize vs 7-ZipRatioTime
7-Zip Ultra LZMA2 -mx=9 48.72 MB
baseline
 4.35× 45.2 s
ICE fast 46.13 MB
−5.3%
 4.60× 3.6 s
ICE balanced 41.56 MB
−14.7%
 5.10× 7.0 s
ICE max 39.76 MB
−18.4%
 5.33× 21.4 s

Intel i7-12700KF, 16 threads, Windows 11, warm cache. 7-Zip 24.08, solid, 64 MB dictionary. Every archive tested after writing.