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SuperCompression

supercompression.org File Utilities Website

Super Compression provides compression tools and information, including settings for converting archives to smaller 7z files.

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supercompression.org
SuperCompression homepage screenshot

About SuperCompression

SuperCompression provides tools and information for recompressing archives and images. Its 7z, ARC and RAR tools reprocess existing archives with automatic method selection, batch drag-and-drop handling and Fast and Ultra modes, and are described as compatible with the original formats. The site also lists a JPEG/PNG/WEBP to JPEG XL converter that uses cjxl.exe and leaves source files intact, an experimental archiver that packs output into .arc, and dated tables of tested compression programs.

Key features

  • Repack 7z, RAR, ZIP inputs to smaller 7z with automatic method switching
  • Repack ARC archives with automatic method switching and external compressors
  • Repack RAR archives with recovery record support
  • Convert JPEG, PNG, WEBP to JPEG XL, retain source file
  • Batch drag-and-drop processing with Fast and Ultra modes
  • Comparison tables of tested compression programs with versions and settings
Best for: People who maintain existing 7z, ARC, or RAR archives or convert images to JPEG XL and want repacking options and test comparisons.
Good for
  • Described as compatible with original 7z, ARC, and RAR formats
  • Batch drag-and-drop processing with Fast and Ultra modes for archive repacking
  • Image tool creates separate _optimized file and leaves the source intact

SuperCompression at a glance

Type
Website
Pricing
Not confirmed. Check the site
Platforms
Web
Open source
Not stated
Language
English
Last checked
Oct 5, 2026 · Online when checked
Listed
Oct 5, 2026

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SuperCompression FAQ

Does the JPEG XL optimizer overwrite the original file?
No. It creates a new file ending in _optimized and leaves the source file intact.
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Listing maintained by Chris McClure and the WebIndexly editors · Updated Oct 8, 2026 · How we rank