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uvg266 vs x265: catalog facts
uvg266	x265
Free Free and open source under the BSD-3-Clause license.	Free Free under the GPL-2.0, with a paid commercial license for proprietary use.
Windows, Linux, Command line	Windows, macOS, Linux, Command line
Encodes video to VVC/H.266 Offers options for encoding speed and compression quality	Widely used reference-quality HEVC encoder Usable as a command-line tool or as a library
Requires raw YUV input	Command-line only, with no graphical interface of its own HEVC playback and distribution can involve patent licensing questions
Downloadable app	Downloadable app
Open source	Open source
License: BSD-3-Clause	License: GPL-2.0
Not stated if an account is needed	No account needed
Not stated if it works offline	Works offline
Official website Full listing and sources Checked October 8, 2026	Official website Full listing and sources Checked October 2, 2026

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