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MuPDFSumatra PDF
Free

Free and open source under the AGPL. Commercial licensing is sold separately.

 Free

Completely free and open source with no ads, bundled software or subscription. No account…

Windows, macOS, Linux, Android, iOS, Command line Windows, Command line
  • Extremely fast and small, with accurate rendering
  • The bundled mutool covers most scripted PDF manipulation
  • Opens PDF, EPUB, MOBI, FictionBook, CBZ/CBR/CBT/CB7, DjVu, XPS, CHM, SVG and many image formats including HEIC and AVIF
  • Lightweight and fast; the portable single .exe build writes nothing to the registry
  • The viewer interface is deliberately minimal and keyboard-driven
  • Commercial use of the library needs a paid licence from Artifex
  • Windows only (Windows 7 through 11; XP and Vista need version 3.1.2); no macOS or Linux version
  • Only unencrypted EPUB and MOBI/AZW ebooks open; DRM-protected files are not supported
Downloadable app Downloadable app
Open source Open source
License: AGPL-3.0 License: GPL-3.0
Not stated if an account is needed Not stated if an account is needed
Not stated if it works offline Not stated if it works offline

Checked September 22, 2026

Checked September 20, 2026

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