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RevPDF vs PDF4QT: catalog facts
RevPDF	PDF4QT
Free Free with all desktop features included, no account or subscription.	Free Free and open source; donations are accepted through GitHub Sponsors.
Windows, macOS, Linux, Android	Windows, Linux, Command line
Processes documents locally without uploading Edits existing text and images	Viewing and editing applications in one project Command-line tool for scripted PDF work
Developer details are not given on the site	No macOS version Mostly the work of a single principal developer
Downloadable app	Downloadable app
Closed source	Open source
License not stated	License: MIT
No account needed	No account needed
Works offline	Works offline
Official website Full listing and sources Checked October 1, 2026	Official website Full listing and sources Checked October 1, 2026

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