Graphviz Graphviz is open source graph visualization software. It has several main graph layout programs. Created by AT&T Research Labs and Contributors. Free Open Source; Mac; Windows; Linux; Web. This document details how to install the Graphviz component for use with. C:Program FilesGraphviz.dot.exe or c:Program Files (x86)Graphviz.dot.exe. Depending on which version of Windows you are using. Default Path: Linux / Mac OSX.