Okular

PDF reader with annotation superpowers

PDF & Note-TakingGPL-2.0+Windows · macOS · LinuxPopular

About Okular

Okular views PDFs, EPUBs, comics and DjVu, with powerful annotation tools, form filling, digital signatures and bookmarks — Adobe Acrobat Reader's functionality without the bloat or upsells.

Okular is completely free and open source (GPL-2.0+) — no trials, no subscriptions, no locked features. Always download from the official website to avoid bundled malware.

Free alternative to: Adobe Acrobat Pro (paid)

Official website

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