For rendering PDFs, it uses the MuPDF library. Sumatra has a minimalist design, with its simplicity attained at the cost of extensive features. It is developed exclusively for Microsoft Windows. If Ghostscript is installed, it supports PostScript files.

Sumatra PDF is a free and open-source document viewer that supports many document formats including: Portable Document Format (PDF), Microsoft Compiled HTML Help (CHM), DjVu, EPUB, FictionBook (FB2), MOBI, PRC, Open XML Paper Specification (OpenXPS, OXPS, XPS), and Comic Book Archive file (CB7, CBR, CBT, CBZ). Note: if the screenshot shows any work that is not a direct result of the program code itself, such as a text or graphics that are not part of the program, the license for that work must be indicated separately. See version 2 and version 3 of the GNU General Public License for more details. This work is distributed in the hope that it will be useful, but without any warranty without even the implied warranty of merchantability or fitness for a particular purpose. This work is free software you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation either version 2 of the License, or any later version. You may use it freely according to its particular license. This screenshot either does not contain copyright-eligible parts or visuals of copyrighted software, or the author has released it under a free license (which should be indicated beneath this notice), and as such follows the licensing guidelines for screenshots of Wikimedia Commons.

Sumatra pdf