How to open STEP files

Did your computer fail to open a STEP file? We explain what STEP files are and recommend software that we know can open or convert your files.

What is a STEP file?

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.

STEP file openers, viewers, etc.

These apps are known to open certain types of STEP files. Remember, different programs may use STEP files for different purposes, so you may need to try out a few of them to be able to open your specific file.

IDA-STEPIDA-STEPUser submitted
MastercamMastercamUser submitted
CadFaster-QuickStepCadFaster-QuickStepUser submitted
STP ViewerSTP ViewerUser submitted
ABViewerABViewerUser submitted
MEGACADMEGACADUser submitted
3D-Tool3D-ToolUser submitted
eDrawings RapidFire Lite ApplicationeDrawings RapidFire Lite ApplicationUser submitted
VariCAD ApplicationVariCAD ApplicationUser submitted
RhinocerosRhinocerosUser submitted
We have not verified any programs that we know for certain can work with STEP-files on Mac. If you know one, please use the Suggest link below and tell us about it!
We have not verified any online services that we know for certain can work with STEP-files. If you know one, please use the Suggest link below and tell us about it!