STP Viewer is a professional tool for viewing CAD models with excellent speed and quality. STP Viewer boast a very user-friendly interface for non-technical users while providing full range of tools for navigation and analyzing the 3D object. For advanced users of this kind viewers there are most of the known command as on any STP Viewer, and for beginners and non-technical users there is a help, and explanation on every tool how to use and what that tool do while using STP Viewer. Very interesting feature in STP Viewer is tree view where you can see all markers that are used in 3D object. You can easily hide or unhide them and see all object part by part. With STP Viewer except zooming and panning you can see the object in 2D in any of the 4 sides (top, bottom, left, right), you can add shade to the object to see how will look like as an real object or to see only wireframe. STP Viewer also allow changing color of wireframes or shade of 3D object.
STP Viewer screenshot STP Viewer 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. With our absolutely free STP Viewer you can easily open 3D files (*.stp), rotate them and perform some basic actions like: zoom, rotate, move or change skin.
Publisher’s description
What is STP Viewer?
STP Viewer by IdeaMK is free Windows software in the 3d & cad category.
Installation and requirements
The publisher provides EXE (Inno Setup) installers for 32-bit Windows. The main installer is 14.9 MB. Installation asks for administrator rights. A silent install is possible with the installer’s documented switches.
Popularity and file types
On Windows it registers 1 file type, including .stp. Similar programs include PrusaSlicer, Ultimaker Cura and MeshLab.
Pros / Cons
Pros
- Free to use
- Documented silent install
- Small download (14.9 MB)
Cons
- No native ARM64 build
- 32-bit only
- Installation needs administrator rights
- No update for more than a year
In short: STP Viewer is a free 3d & cad tool for 32-bit PCs. Updates have slowed down. Administrators can deploy it unattended.
Is STP Viewer safe to download?
- The file is served by stpviewer.com, the publisher’s own domain
- The download link uses HTTPS
- A SHA256 hash is published, so you can verify the file:
6020A0A0417D5F3FDB994336E953D6ADC969CA324BBDBD356F9B7150FF62F253· Open the VirusTotal report for this hash - The link answered when we last checked it (October 22, 2026)
- ExeAtlas does not host, wrap or modify installers
Related guide: How to check a file’s SHA256 hash on Windows
Recent versions
All 1 versions ›| Version | Date | Size | Files |
|---|---|---|---|
| 2.3Latest | February 15, 2025 | 14.9 MB | 32-bit EXE (Inno Setup) |
Install from the command line
Silent install ›winget install --id IdeaMK.STPViewer -estviewersetup.exe /VERYSILENT /SUPPRESSMSGBOXES /NORESTART /SP-Related guide: How to use winget: install and update apps
Information
- Publisher
- IdeaMK
- Category
- 3D & CAD
- Licence
- Freeware
- Price
- Free
- Requires
- Windows 11 / 10
- Architecture
- 32-bit
- Installer
- EXE (Inno Setup)
- Version
- 2.3
- Released
- February 15, 2025
- Added to the catalogue
- February 15, 2025
- Versions listed
- 1
- Website
- stpviewer.com
- winget ID
- IdeaMK.STPViewer
File types it opens (1)
Ratings and reviews
No reviews yet. Be the first to rate it.
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Frequently asked questions
Is STP Viewer free?
Yes. STP Viewer is free to use.
Is STP Viewer safe to download?
The download comes from stpviewer.com, which belongs to the publisher; ExeAtlas does not host or change the file. Compare its SHA256 hash with the one shown here, or open the VirusTotal report for that hash.
How do I install STP Viewer with winget?
Open PowerShell or Windows Terminal and run the winget command shown on this page. winget downloads the official installer and checks its SHA256 hash before running it.
Can STP Viewer be installed silently?
Yes. The silent install page lists the exact command for each installer.
Does STP Viewer run on ARM (Windows on Arm)?
There is no ARM64 build; Windows 11 on Arm can run the 32-bit version through emulation.
What are alternatives to STP Viewer?
PrusaSlicer, Ultimaker Cura, MeshLab, OpenToonz and UVtools. The alternatives page compares them.
