Sumatra PDF for Windows

Quick summary

Sumatra PDF is a free Windows program built for reading documents quickly. It focuses on speed and a small system footprint, so it launches rapidly and keeps resource use low — a good match for people who need a dependable viewer without unnecessary extras.

File types supported

• Comic book archives (CBR/CBZ and similar)
• XPS documents
• MOBI e-book files
• EPUB books

Primary capabilities

• Runs as a portable application so you can use it from a USB stick without installing
• Lets you assign custom hotkeys for faster navigation and control
• Handles multiple open documents with a tabbed layout

Interface and performance

The user interface is uncluttered and easy to use, making document navigation straightforward. Because the program prioritizes minimalism, it opens files quickly and uses little memory and CPU compared with heavier alternatives.

Who should use it

If you want a no-frills, efficient tool to view PDFs and other common reading formats, this is a strong option. It provides enough versatility for various reading needs while avoiding the complexity and size of full-featured editors.