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Zstandard vs bzip3: catalog facts
Zstandard	bzip3
Free Free and open source, dual licensed BSD or GPLv2.	Free Free to use, with source code published on GitHub.
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	Aims for better compression than bzip2 Includes cat, grep and less style helper commands
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…	The .bz3 format is less widely supported than gzip or bzip2 Command line only
Downloadable app	Downloadable app
Open source	Open source
License: BSD-3-Clause	License not stated
No account needed	No account needed
Works offline	Works offline
Official website Full listing and sources Checked September 21, 2026	Official website Full listing and sources Checked September 23, 2026

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