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STP File Format Explained

The Standard for the Exchange of Product model data (STP) format is an ISO 10303 standard designed for the neutral exchange of product model data. It is widely used for sharing precise 3D CAD data between different modeling and manufacturing software applications. The format is commonly saved with either the STEP or STP file extension; these extensions are interchangeable and refer to the same underlying format.

	Icon	Extension	Original Software	Year	Primary Industry	Geometry	UV Maps	Textures	PBR	Animation	Rigging	Open Use
		.STP	CAD Exchange	1994	Engineering Manufacturing Architecture	NURBS	–	–	–	–	–	✔
STP File Format Details What It Stores It stores highly accurate 3D geometry, including boundary representation geometry, surface data, assembly hierarchies, and, in some application protocols, product manufacturing information. It is not primarily a polygon, texture, or animation format; its main focus is CAD geometry and product data. Primary Use Cases Interoperable CAD data exchange between different software suites. Mechanical, product, and structural engineering design sharing. Manufacturing and CNC machining preparation. Strengths High geometric precision using mathematical curves rather than polygonal approximations. Standardized, platform-independent ISO framework. Preserves complex assembly structures and component hierarchies. Limitations Can produce large files, especially for complex geometry or assemblies. Not designed for textures, rigging, or animation workflows. Common Software Support Supported by major CAD platforms like Autodesk Inventor, Autodesk Fusion, SolidWorks, CATIA, Rhino, and FreeCAD.

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STP File Format Details