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In this article, we will walk you through some of the best free STEP file viewer software.

STEP is a file extension for a 3-D graphic file used by CAD software. “STP” stands for “Standard for the Exchange of Product Model Data.” STP files are used to store 3D image data in an ASCII format, following the standards defined in ISO 10303-21: Clear Text Encoding of the Exchange Structure.

The following is a list of free STEP file viewer software.

We have included some of the best free STEP file viewer software in the list below.


FreeCAD is a free, open-source parametric 3D modeler made primarily to design real-life objects of any size. It can be used for viewing. STP File.

It is a cross-platform software that supports Windows, Linux, and Mac.

Visit the below link to download FreeCAD software.


The STP Viewer is a professional tool for viewing CAD models with excellent speed and quality. It boasts a very user-friendly interface for non-technical users while providing a full range of tools for navigation and analyzing the 3D object.

It is a software tool for viewing international STEP standard files. STEP files (.stp) for 3D and assembly are often used by all major mechanical CAD systems.

It is not a cross-platform software; it supports only the Windows operating system.

3D Viewer

Use the Professional 3D STP Viewer to import and read *.stp and *.step file formats. The 3D STP Viewer can print and convert STP to DWGSTLDXFOBJ, and other formats. It supports only the Windows operating system.

VariCAD Viewer

The VariCAD Viewer is a free viewer, convertor, and printer software working with 2D DWG, DXF, 3D STEP, and 2D/3D VariCAD file formats.

It allows you to convert DWG to DXF and vice-versa, convert STEP to 3D IGES or STL formats, print 2D DWG, DXF, or VariCAD formats, and use batch printing or batch conversions.

All conversions are also available between VariCAD’s native format and the other listed formats. The VariCAD viewer offers settings for 3D display methods (like light source or perspective). The 3D display can also be exported into a high-resolution bitmap file.

It supports Windows and Linux operating systems, but there is no support for Macs.


IDA-STEP v4 is a new generation of standards-based tools from LKSoft. Based on international standard ISO 10303 (STEP), IDA-STEP v4 supports the viewing and management of various STEP-data.

3D/2D models, PCB/PCA, PDM, and other data, the component-based IDA-STEP v4 structure provides full customization capabilities and is easily extendable. It is a cross-platform software that supports Windows, Linux, and Mac.

Follow our post on the best free DWG file viewer software list.



There are many free STEP file viewers available for free. It depends upon the user which one they want to use to get the job done. We have included in this post only offline viewers. The following are some of the best online free STEP file viewers, such as Autodesk Viewer, 3D Online Viewer, and Clara.io.

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By Feroz Khan

Feroz Khan works as a system administrator with more than 12 years of experience in information technology. He would like to share the knowledge with others that he has gained during his working experience.

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5 months ago

Good free step file viewer list.

4 months ago

FreeCAD is my best for viewing DXF, DWG, and STEP files.

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