TAR.XZ (TXZ) to TAR.7Z (T7Z) Converter
Convert your tar.xz files to tar.7z online & free
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How to convert TAR.XZ to TAR.7Z
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About formats
TAR.XZ is a compound archive format combining TAR) archiving with XZ compression, developed by the Tukaani Project and led by Lasse Collin since 2009. The TAR layer bundles files preserving Unix metadata, and XZ applies LZMA2 compression within a robust container featuring CRC-32 and CRC-64 integrity checks, padding support for media storage, and a stream/block structure enabling parallel decompression. LZMA2 improves on LZMA with better handling of incompressible data and multi-threaded compression support. TAR.XZ has become the preferred distribution format for many open-source projects — the Linux kernel, GNU core utilities, and numerous other packages ship their source tarballs as .tar.xz files. One advantage is the best compression-to-decompression-speed ratio among widely supported formats — XZ achieves compression ratios comparable to 7Z while decompressing faster than bzip2, an ideal combination for software distribution. The built-in integrity verification is another strength: unlike raw LZMA streams, the XZ container includes checksums that detect corruption before data reaches the application layer. GNU tar supports TAR.XZ natively via the -J flag, and xz-utils are packaged in every major Linux distribution. The format has effectively replaced TAR.GZ and TAR.BZ2 as the default for source code distribution in the open-source ecosystem.
TAR.7Z is a compound archive format that combines the TAR) container with 7-Zip's LZMA/LZMA2 compression. The TAR layer bundles multiple files into a single stream preserving Unix metadata (permissions, ownership, symlinks), while the outer 7Z compression applies LZMA or LZMA2 to the entire stream. This combination leverages LZMA's superior compression ratios — typically 30-70% better than gzip — making TAR.7Z one of the most space-efficient archive formats for Unix-style backups and software distribution. The solid-stream approach means compression can exploit redundancy across all archived files rather than compressing each file independently. One advantage is maximum compression density: the TAR.7Z combination often produces the smallest archives among common Unix archive+compression pairings. Broad tool support is another strength — tar and 7-Zip are available on all major platforms, and many modern tar implementations can create and extract TAR.7Z archives directly with the appropriate flag. The format is popular for distributing large source code trees and backup archives where minimizing transfer size justifies the additional compression time.