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Zstandard vs XZ Utils: catalog facts
Zstandard	XZ Utils
Free Free and open source, dual licensed BSD or GPLv2.	Free The software is free under its open-source licence. Hosting, hardware and external…
Windows, macOS, Linux, Command line	Windows, macOS, Linux, Command line
Compression close to zlib's ratio at several times the speed, and much faster decompression The format is standardised in RFC 8878 with multiple independent implementations	LZMA2 compression gives some of the best ratios available for general-purpose data, and the tools ship on effectively…
A command-line tool with no graphical interface of its own Maximum ratio is below xz or 7z at their slowest settings, which is the trade it makes on…	Compression is slow and memory-hungry at high levels, and the 2024 backdoor incident in the upstream release tarballs…
Downloadable app	Downloadable app
Open source	Open source
License: BSD-3-Clause	License: 0BSD
No account needed	Not stated if an account is needed
Works offline	Not stated if it works offline
Official website Full listing and sources Checked September 21, 2026	Official website Full listing and sources Checked September 22, 2026

Catalog facts only. Anything “not stated” is unconfirmed. Check full listings for details.