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

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