Online STP File Viewer
View STP CAD files online without software installation with Vega3D.
How to View an STP File Online
Open and inspect any STP file in three simple steps no software install and no signup needed.
Upload Your STP File
Drag and drop your .stp file or click to browse. Your STP file, up to 50MB, is processed right in your browser.
View & Interact
Your STP file appears in seconds. Orbit, pan and zoom with your mouse or touch to examine it from any angle.
Inspect Every Detail
Switch to wireframe, toggle the reference grid, reset the view, and check the vertex and face counts in the model info panel.
Why Use the Vega3D STP Viewer
A fast, private and free way to open STP files right in your browser.
Your Files Stay Private
Your STP files are processed locally in your browser and never uploaded to a server, so confidential designs stay with you.
No CAD Software Needed
Open STP files without installing CAD software or using up a license seat. Everything runs in your browser.
Completely Free
View as many STP files as you want, with no account, no watermark and no hidden limits.
Works on Any Device
Runs on Windows, Mac, Linux, phones and tablets, right in the browser with full touch controls.
Wireframe & Model Info
Switch to wireframe to reveal the underlying structure, and check vertex and face counts in the built-in info panel.
The STEP Standard
STP files use the same ISO STEP standard, read with a real CAD kernel so parts and assemblies appear true to the original design.
Use Cases of the STP Viewer
See how the online STP viewer helps teams open parts and assemblies without installing CAD software.
Open Parts & Assemblies
View STP parts and assemblies exported from SolidWorks, Fusion 360, Inventor or CATIA.
Client & Vendor Files
Open an STP a client or vendor emailed you without installing their CAD software.
Machine Shop Review
Check part geometry on the shop floor before setting up machining or fabrication.
Design Validation
Confirm a revision looks correct before importing it into your CAD workflow.
Check Before Import
Make sure the STP contains what you expect before bringing it into a project.
Learning CAD
Study STP models to understand how parts and assemblies are structured.
Frequently Asked QuestionsFrequently
Asked
Questions
An STP file is a STEP CAD file saved with the shorter .stp extension. It follows the same ISO 10303 standard and stores precise 3D solid geometry.
Yes. STP and STEP are the same format and only the file extension differs. This viewer opens both.
Drag and drop your .stp file onto the viewer. It is read and rendered right in your browser.
SolidWorks, Fusion 360, CATIA, Inventor, Creo, NX and most professional CAD tools can export STP.
No. STP files are read by an OpenCascade CAD engine running as WebAssembly in your browser, so no CAD seat is required.
The first file initializes the CAD engine (WebAssembly) in your browser. Once it is ready, later files load noticeably faster.
No. The STP viewer runs entirely in your browser, so there is no CAD software to install and no license seat needed.
No. Your .stp file is processed locally inside your browser, so it never leaves your device. That matters when your designs are confidential.
You can view STP files up to 50MB. For very large or highly detailed files, close other browser tabs to free up memory for the smoothest performance.
The viewer is for viewing and inspecting only. If you need to change formats, use the Vega3D 3D Converter.
Yes. Because it runs in the browser, you can open and rotate STP files on a phone or tablet using touch gestures, with no app required.
