Skim

Free PDF reader and note-taker for macOS

Skim is an open-source PDF viewer for the Mac designed for reading and annotating scientific papers, with notes and highlights.

Visit Skim ↗

Pricing: Free

Platforms: Mac

Categories: Productivity

Skim is an alternative to

Adobe Reader · macOS Preview

Skim compared with similar tools

Product	Price	Open source	Self-host	Platforms
Skim	Free	Yes	–	Mac
Highlights	Free plan	–	–	Mac, iOS
Okular	Free	Yes	–	Linux, Windows
Readwise Reader	Paid	–	–	Web, Mac, Windows, iOS, Android, Browser extension
SumatraPDF	Free	Yes	–	Windows
Rectangle	Free	Yes	–	Mac
PDF Expert	Free plan	–	–	Mac, Windows, iOS

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Questions

Is Skim free?

Skim is free.

Is Skim open source?

Yes, Skim is open source.

What platforms does Skim run on?

Skim is available for Mac.

What are some alternatives to Skim?

Similar indie products include Highlights, Okular, Readwise Reader, SumatraPDF and 4 more.

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