The "Space Syntax Toolkit" is a QGIS plug-in for spatial network and statistical analysis. It provides a front-end for the depthmapX software within QGIS, offering user-friendly space syntax analysis workflows in a GIS environment. It is primarily aimed at supporting the space syntax methodology, and enhancing it with GIS data, analysis and visualisation features. Nevertheless, its functionality is of general benefit to QGIS users by introducing tools for exploratory spatial data analysis. In this article we present the "Space Syntax Toolkit", describing its principles and implementation, the features of its two initial modules - "Graph Analysis" and "Attribute Explorer" - and give indication of future developments.