The X3D file extension is used to refer to graphic images created on three-dimensional platforms. X3D files are used for 3D rendering projects. X3D files can be accessed and edited with the appropriate software.
The x3d file extension is associated with X3D. X3D is a scalable and open software standard for defining and communicating real-time, interactive 3D content for visual effects and behavioural modelling. It can be used across hardware devices and in a broad range of applications including CAD, visual simulation, medical visualization, GIS, entertainment, educational, and multimedia presentations. X3D provides both the XML-encoding and the Scene Authoring Interface (SAI) to enable both web and non-web applications to incorporate real-time 3D data, presentations and controls into non-3D content. X3D is the successor to the Virtual Reality Modelling Language (VRML). It improves upon VRML with new features, advanced APIs, additional data encoding formats, stricter conformance, and a componentized architecture using profiles that allows for a modular approach to supporting the standard and permits backward compatibility with legacy VRML data.