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Xodo PDF StudioPDF4QT
Paid

Paid software with a downloadable free trial.

 Free

Free and open source; donations are accepted through GitHub Sponsors.

Windows, macOS, Linux Windows, Linux, Command line
  • Native versions for Windows, macOS and Linux
  • OCR, redaction, comparison and batch processing
  • Viewing and editing applications in one project
  • Command-line tool for scripted PDF work
  • Paid licence after the trial
  • Recent rebranding to Xodo may cause confusion in documentation
  • No macOS version
  • Mostly the work of a single principal developer
Downloadable app Downloadable app
Closed source Open source
License not stated License: MIT
Not stated if an account is needed No account needed
Not stated if it works offline Works offline

Checked September 23, 2026

Checked October 1, 2026

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