Supported Formats

Purpose

Complete reference of all supported archive formats.

Format Table

Format	Extension	Extractor	Library	Features
7-Zip	.7z	SevenZipExtractor	Omnizip	LZMA, LZMA2, BCJ2
Self-extracting 7-Zip	.exe	SevenZipExtractor	Omnizip	Auto-detection
Microsoft CAB	.cab	CabExtractor	Cabriolet	LZSS, MSZIP, LZX, Quantum
Self-extracting CAB	.exe	CabExtractor	Cabriolet	Fallback from 7-Zip
CPIO	.cpio	CpioExtractor	Omnizip	Old and new formats
GZIP	.gz	GzipExtractor	Ruby stdlib	Magic byte check
TAR + GZIP	.tar.gz, .tgz	GzipExtractor → TarExtractor	Omnizip	Automatic chain
Windows Installer	.msi	OleExtractor	Omnizip	OLE compound document
Red Hat Package	.rpm	RpmExtractor	Omnizip	GZIP/XZ payload
TAR	.tar	TarExtractor	Omnizip	POSIX, GNU, PAX
XAR	.xar	XarExtractor	Omnizip	XML-based index
macOS Package	.pkg	XarExtractor	Omnizip	CPIO payload
XZ	.xz	XzExtractor	Omnizip	LZMA, LZMA2
TAR + XZ	.tar.xz, .txz	XzExtractor → TarExtractor	Omnizip	Automatic chain
ZIP	.zip	ZipExtractor	Omnizip	Deflate, Store

Compression Support

CAB Compression

• None (uncompressed)

• LZSS (simple dictionary)

• MSZIP (deflate-compatible)

• LZX (high ratio)

• Quantum (memory-efficient)

7-Zip Compression

• LZMA

• LZMA2

• PPMD

• BCJ (x86 filter)

• BCJ2 (enhanced x86)

ZIP Compression

• Store (none)

• Deflate

Platform Support

Dependencies

macOS:: PKG, XAR

All formats are supported through pure Ruby libraries:

• Omnizip (~> 0.3.8)

• Cabriolet (~> 0.2.2)

No native dependencies required.