Ggb

GeoGebra Worksheet file format is the default file format for the GeoGebra educational software. It is an open source application for teaching and learning mathematics and science. It is used to visualize mathematics in the class room.

Format
The GGB file format is a ZIP container with an XML file (called geogebra.xml) and a PNG for preview (geogebra_thumbnail.png). The container can also include a script file and other images used in the worksheet. The script file can be JavaScript (geogebra.js) or GGBScript. When the ZIP container is opened in an text/Hex editor you will see the geogebra.xml and geogebra_thumbnail.png in plain text.