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Sumatra PDF vs PDF-XChange Editor: catalog facts
Sumatra PDF	PDF-XChange Editor
Free Completely free and open source with no ads, bundled software or subscription. No account…	Freemium Most features are free. Some tools add a watermark unless you buy a licence.
Windows, Command line	Windows
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	Most features work in the free version rather than being blocked Fast rendering and a genuinely capable annotation toolset
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	Paid-only features watermark output rather than being hidden Windows only, closed source
Downloadable app	Downloadable app
Open source	Closed source
License: GPL-3.0	License not stated
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
Official website Full listing and sources Checked September 20, 2026	Official website Full listing and sources Checked September 22, 2026

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