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MuPDF vs Adobe Acrobat Reader: catalog facts
MuPDF	Adobe Acrobat Reader
Free Free and open source under the AGPL. Commercial licensing is sold separately.	Freemium Free to use; editing and conversion require a paid Adobe Acrobat subscription.
Windows, macOS, Linux, Android, iOS, Command line	Windows, macOS, Android, iOS
Extremely fast and small, with accurate rendering The bundled mutool covers most scripted PDF manipulation	Faithful rendering of complex PDFs and forms Form filling, signing and annotation included free
The viewer interface is deliberately minimal and keyboard-driven Commercial use of the library needs a paid licence from Artifex	Frequent prompts to upgrade to paid Acrobat Large install compared with lightweight readers
Downloadable app	Downloadable app
Open source	Closed source
License: AGPL-3.0	License: Proprietary
Not stated if an account is needed	Not stated if an account is 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 1, 2026

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