STP Viewer is a professional software to work with 3D file formats. In addition to STP/STEP, it supports more than twenty popular 3D formats, including IGS/IGES, SAT, STL, OBJ, BREP. The viewer has different visual styles and all necessary tools to interrogate 3D models. The panel Structure shows the file content and properties of the selected object: its overall dimensions, volume and center of mass. By using this panel users can control visibility of 3D models\' parts and save separate parts as DWG or DXF files.With easy-to-use measuring tools users can get more detailed information about a 3D model: area, height between two parallel surfaces, distance between two points, length of an edge and radius of a circle or a circular arc. Results of measurements are displayed in the special panel and added above the 3D model. Dimension texts can be moved, hidden or deleted. The 3D model with all measurements may be printed or saved as BMP file.3D section tool enables to create one or more fully customizable section planes. They cut a 3D model so users can peer inside it and measure its hidden elements.It is possible to convert 3D files to other formats such as STP/STEP, IGS/IGES, STL, DWG, DXF, OBJ, PDF, JPG, etc.The software gives an opportunity to work not only with 3D, but also 2D CAD formats: DWG, DXF, HPGL, SVG, CGM and others.Feature-rich software, reasonable price, perpetual license!