Files with the .step extension are usually 3D model files created in the STEP file format. STEP stands for Standard for the Exchange of Product Data. This ISO standard exchange format is used to distribute 3D data files (such as CAD files) in a format that can be viewed by a variety of software applications. The .step file extension is interchangeable with the .stp file extension.
The .step file extension is also used for PyDDR files.
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If you have additional information about the STEP file format or software that uses files with the STEP suffix, please do get in touch - we would love hearing from you.