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MuPDF vs apvlv: catalog facts
MuPDF	apvlv
Free Free and open source under the AGPL. Commercial licensing is sold separately.	Free Free and open source.
Windows, macOS, Linux, Android, iOS, Command line	Windows, Linux
Extremely fast and small, with accurate rendering The bundled mutool covers most scripted PDF manipulation	Vim-style keyboard navigation Opens both PDF and EPUB
The viewer interface is deliberately minimal and keyboard-driven Commercial use of the library needs a paid licence from Artifex	Small user base Keyboard-centric interface takes learning
Downloadable app	Downloadable app
Open source	Open source
License: AGPL-3.0	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 September 22, 2026	Official website Full listing and sources Checked October 2, 2026

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