What Does Ultra7z Archive Optimizer Do According to Super Compression?

Updated

Ultra7z Archive Optimizer is a Windows compression tool featured on supercompression.org that repacks existing 7z, RAR, and ZIP archives into smaller 7z files. According to the site's featured post (version 1.15, published October 17, 2024), it automatically switches compression methods during archive creation, applies tuned LZMA settings for certain file types, and supports batch drag-and-drop processing in Fast and Ultra modes. It is aimed at anyone who wants to shrink archives they already have—for local storage or cloud backup—without manually choosing codecs per file.

What the tool actually does

The core function is optimization and conversion, not creating archives from scratch:

  • Repacking: It takes an existing 7z, RAR, or ZIP archive and rebuilds it as a smaller 7z archive.
  • Automatic method switching: During creation, it selects among PPMD, LZMA, LZMA2, DEFLATE, DELTA, and BZIP2 rather than forcing one algorithm on the whole archive.
  • Tuned LZMA: The site claims improved LZMA settings specifically for JPG, BMP, WAV, and EXE content, which typically compress poorly under default settings.
  • Format compatibility: Output remains a standard 7z archive, so it can be opened with ordinary 7-Zip and similar tools.
  • Batch processing: Archives can be dragged and dropped for bulk repacking.
  • Two modes: "Fast" and "Ultra" repacking modes let you trade processing time against compression ratio.

How the pieces fit together

Feature What it means in practice
Auto codec switching Different files inside one archive get different algorithms, which is where much of the size gain comes from
Tuned LZMA for media/executables Targets file types that usually resist compression
Standard 7z output No lock-in; existing 7-Zip workflows keep working
Drag-and-drop batch Practical for cleaning up a folder of old archives
Fast vs. Ultra modes Choose speed for routine work, Ultra when maximum savings matter

A useful way to picture it: a mixed archive containing photos, audio, and a few executables would normally be compressed with one method. Ultra7z instead routes each file type to a better-suited method—for example, tuned LZMA for the JPGs and EXEs—so the final 7z is smaller than a default 7-Zip pass would produce. The site describes the result as "better than non tuned 7-zip original."

Who it is for

The post frames the benefit around storage cost: reducing archive size saves space on your computer or cloud storage and avoids paying for more storage than you need. That makes it most relevant if you keep large collections of old archives or regularly upload compressed files to cloud services.

What to keep in mind

  • The site presents these as product claims; the compression gains depend on what is inside your archives, so results will vary by content mix.
  • The page does not state pricing, licensing terms, or system requirements, so check those on the site before relying on it.
  • Because output is standard 7z, you can verify results by comparing file sizes before and after with any 7-Zip-compatible tool.