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View 3D STPZ Files Online

Use this free tool to view your 3D STPZ (Compressed STEP-File) files online without needing to install any software. Our STPZ viewer tool will generate a real-time 3D preview of your STPZ file with Pan and Zoom controls, allowing you to see your 3D model from any angle.

Our STPZ viewing tool can load most STPZ files, and we are working on improvements all the time to improve compatibility with all file formats. If you are looking to convert your 2D image files to 3D files, such as STL, then we have a 2D to 3D conversion tool here.

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How to View your STPZ File Online?

Here are two simple steps to display your STPZ file in any web browser.

Upload an STPZ

Click the "Upload a File" button and select an STPZ to upload. The maximum file size is 100MB.

View your STPZ

Once processed, your STPZ file will be displayed in the web browser.

File Format Information for STPZ

Full NameCompressed STEP-File
Type3D Model
Mime Typeapplication/octet-stream
ToolsSTPZ Converters, 3D Model Voxelizer, Create STPZ Animation, Text to STPZ, STPZ Viewer


The STPZ file format is a compressed version of the STEP file format, which is a 3D format defined in 1994 and used to store 3D objects for use in computer-aided design (CAD) applications. STPZ files are compressed binary files that, when decompressed into text format, contain one rendering command per line.

Although STEP files are widely supported by most CAD applications, there are only a few that support STPZ files. As with the uncompressed STEP version, the STPZ format does have its limitations, such as the necessity to read the complete file into memory in order to parse the contents, and due to the textual storage of information, the files can be quite large.

STPZ Features

  • Mesh Geometry (Vertices and Faces)
  • Vertex Normals
  • Face Normals
  • Vertex Colors
  • Face Materials (Excluding textures)
  • Textures
  • Point Cloud
  • Multiple Objects Per File
  • Object Transforms (Translation, Rotation, and Scale)
  • Bones/Joints
  • Animations
  • Suitable for 3D Printing

Frequently Asked Questions

How can I view my STPZ file online?

First, click the "Upload..." button and select the STPZ file you wish to view. Once your STPZ file has been received it will be displayed in your browser.

How long does it take to view my STPZ file?

We aim to process all STPZ file viewing requests as quickly as possible, this usually takes around 5 seconds but can be more for larger or more complex files so please be patient.

How accurate is the STPZ file viewer?

We aim to create the most accurate rendition of your STPZ file with our tools. Our tools are under constant development with new features and improvements being added every week.

Is it safe to view my STPZ file on

Yes, of course! We do not store the STPZ file you submit. The generated preview file within your browser is deleted after 15 minutes,

Can I view my STPZ file on Windows, Linux, Android, iOS or Mac OS?

Yes! Our STPZ file viewer will run on any system with a modern web browser. No specialist software is needed to use our file viewing tools.

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