STP Viewer: Online & Free

Open, analyze parts and assemblies, measure distances and volume, and prepare STP files for manufacturing.

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Which STP Viewer Is Best for You?

Compare popular STP viewers to find the best one for your 3D workflow.

MeshInspector
MeshInspector
Other STL Readers
Perfomance
Ultra-fast (GPU acceleration)
High
Slow
Batch Import
Unlimited
Unlimited
Single file
File Limits
Unlimited
Unlimited
~100 MB
Measurement Tools
Advanced
Advanced
Limited
Metadata Support
Full
Full
Not supported
Scaling
Advanced
Advanced
Not supported
3D Editor
Advanced
Advanced
Not supported
Screenshots
Advanced
Advanced
Limited
Supported Files
STL (ASCII/Binary), OBJ, PLY, GLTF
STL (ASCII/Binary), OBJ, PLY, GLTF
STL (Binary)
Export
Multiple formats
Multiple formats
Not supported
Security & Privacy
Corporate security + Local storage
SSL + Auto-delete
Server-side storage
Cross-Platform
Windows, macOS, Linux
All devices
Web only, poor mobile UX
Suitable for
Professional & industrial use
Quick viewing & sharing
Not recommended

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How to Open STP Files on Windows, Mac & Linux

Engineers, designers, and other 3D data specialists often search for reliable programs to read STP files. Such programs are expected to work with speed, precision, accuracy, and compatibility with any operating system. In this regard, MeshInspector provides a free and cross-platform way to open, view, and inspect STP models, both online and offline, whatever suits you best. Try MeshInspector to see how it handles heavy files with assemblies efficiently, giving you full control over your model’s quality and scale

1

Open an STP to View It

Under the ’Home’ tab, choose ’Open Files.’ This will allow you to load your STEP geometry into MeshInspector to read it. Once selected, the program imports the STP file and prepares it for viewing, no matter how detailed the model is or how many components it contains.

2

Selecting an STP File

Navigate to the folder where your STP is stored. Then, either double-click it or confirm the choice with 'Upload.' The MeshInspector program for STP files can accept entire folders and zipped project archives. Thus, you can bring in complex datasets without any headache.

3

Viewing an STP File

After the STP is loaded, the model appears in the workspace. Explore it. Rotate the view by dragging via the left mouse button or using a single-finger touchpad gesture. Pan by holding the right mouse button or moving two fingers. Zoom by scrolling the mouse wheel or pinching on the touchpad. Tilt the perspective by holding Ctrl while dragging with the left button.

4

Checking the Size of an STP

To quickly inspect the size of your STP model, go to the ’Inspect’ tab to enable ‘Bounding Box,’ with the mesh selected in our Scene Tree. This will display the model’s overall dimensions and help you verify its scale before exporting or processing it.

5

Changing the STP Size

Need to adjust the size of your STP? Use the Scale slider under ‘Transform,’ located in the lower-left panel. After selecting the value, apply the change by clicking the checkmark icon. The model’s dimensions will update instantly, together with its volume.

6

Inspecting the STP Quality

Any advanced program for reading STP files should offer more than simple viewing. MeshInspector fully meets this requirement. To verify the quality of your STP model, open ‘Mesh Healer’ under ‘Mesh Repair’ and review the model for potential issues.

7

Fixing Issues in STPs

Use ‘Local Repair’ to detect various issues, e.g., holes and disconnected parts. Enable specific checks using the checkboxes, then run the repair. If you choose ‘Auto Repair’, MeshInspector will attempt to fix the model by rebuilding the geometry.

8

Distance Measurements in STPs

In order to measure distances in your STP model, open ‘Inspect,’ then enable ‘Measure Distance’. After that, click on the points of interest on the surface. MeshInspector will calculate the full 3D distance, along with the X, Y, and Z projections. This feature is helpful when you need precise dimensional checks.

Open-Source STP Viewer for Developers

Integrate real-time 3D visualization, mesh analysis, and measurement tools directly into your applications with MeshLib SDK.

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