Free Online STEP File Viewer
Open STEP and STP files in your browser. No CAD software, no account.
How to open a STEP file online
Drop in your STEP file
Drag a .step or .stp file onto the viewer, or click to pick one.
Look at it from every angle
Drag to turn the model, scroll to zoom, right-drag to move it.
Save a picture or a mesh
Download a PNG of the view, or the model as GLB or STL.
When a STEP viewer helps
Check a supplier part fast
Open a part from a supplier or a colleague without a CAD seat.
Temporary conversion
Converted on our server, deleted as soon as possible.
Pass the shape on
Save the model as GLB or STL for a tool that cannot read STEP.
What is a STEP file?
A STEP file is a CAD file that moves 3D parts and assemblies between different CAD programs. It uses the .step or .stp extension, and both are the same format.
The viewer turns the curved surfaces into a fine triangle mesh so the browser can draw them. Shapes look right; exact dimensions and the feature history stay in your CAD system.
Maximum file size: 256 MiB.
Need another 3D format?
One viewer opens STEP, IGES, GLB, STL and OBJ.
Frequently Asked Questions
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