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Adobe Acrobat Reader vs MuPDF: catalog facts
Adobe Acrobat Reader	MuPDF
Freemium Free to use; editing and conversion require a paid Adobe Acrobat subscription.	Free Free and open source under the AGPL. Commercial licensing is sold separately.
Windows, macOS, Android, iOS	Windows, macOS, Linux, Android, iOS, Command line
Faithful rendering of complex PDFs and forms Form filling, signing and annotation included free	Extremely fast and small, with accurate rendering The bundled mutool covers most scripted PDF manipulation
Frequent prompts to upgrade to paid Acrobat Large install compared with lightweight readers	The viewer interface is deliberately minimal and keyboard-driven Commercial use of the library needs a paid licence from Artifex
Downloadable app	Downloadable app
Closed source	Open source
License: Proprietary	License: AGPL-3.0
Not stated if an account is needed	Not stated if an account is needed
Works offline	Not stated if it works offline
Official website Full listing and sources Checked October 1, 2026	Official website Full listing and sources Checked September 22, 2026

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