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Smallpdf vs PaperKnife+: catalog facts
Smallpdf	PaperKnife+
Freemium A limited free tier is available. Pro is a paid subscription.	Free Free and open source under the GPL-3.0 licence.
Windows, Android, iOS, Web	Android
Clean, fast interface that covers the common PDF chores Desktop and mobile apps alongside the browser tools	Works fully offline with no trackers Merge, split, rotate and rearrange pages
Free use is capped at a couple of documents per day Files are processed on their servers	Android only No text editing or annotation listed
Web application	Downloadable app
Closed source	Open source
License not stated	License: GPL-3.0
Not stated if an account is needed	No account needed
Not stated if it works offline	Works offline
Official website Full listing and sources Checked September 22, 2026	Official website Full listing and sources Checked October 2, 2026

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