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Secure PDF ViewerMuPDF
Free

Free and open source under the MIT and Apache-2.0 licenses.

 Free

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

Android Windows, macOS, Linux, Android, iOS, Command line
  • Requires no app permissions
  • Uses a sandboxed WebView to display PDF streams
  • Extremely fast and small, with accurate rendering
  • The bundled mutool covers most scripted PDF manipulation
  • Android only
  • The viewer interface is deliberately minimal and keyboard-driven
  • Commercial use of the library needs a paid licence from Artifex
Downloadable app Downloadable app
Open source Open source
License: MIT AND Apache-2.0 License: AGPL-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 October 8, 2026

Checked September 22, 2026

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