Sumatra PDF is a super-lightweight, incredibly fast, well supported and open source PDF (and ePub, MOBI, CHM, XPS, DjVu, CBZ & CBR) viewer for Windows.
The Sumatra PDF developer(s) have found the absolute perfect balance between features, ease of use, and speed. I’ve been using this app since 2008 (it’s been around that long!) and I forget how slow and bloated other PDF viewers are until I try to open a PDF on a different computer. With Sumatra PDF it feels like .pdf files open as fast as .txt files. Even 20MB+ files open instantly.
You can switch between various “views”, search within documents, highlight text, add pages to favorites – all the standard stuff you’d expect. Then you can really customize it by editing the advanced settings.
Be sure to check out it’s extensive keyboard shortcut list and online documentation for advanced uses etc.
On top of all of that – it’s free! Not just free, but open-source free. It’s absolutely worthy of our “Windows App of the Month” award.
It works in Windows 10, Windows 8, Windows 7 and Vista. It even works in Windows XP you just need to use an earlier version. Download Sumatra PDF here. If you do find it super helpful and would like to support the author, there are a few ways.
After you use Sumatra PDF for a bit you’ll almost certainly want to make it your default PDF reader, and we have instructions on how to do that in Windows 8 or Windows 10.