# Free online STEP viewer.

Canonical page: https://imageto3dprint.com/step-viewer

Open STEP and STP files without launching a CAD workstation. Rotate your part and explore its visible geometry in your browser.

Choose a STEP or STP file to inspect a CAD part in 3D. The browser creates a display mesh from its CAD geometry so you can rotate and zoom the model. Your original STEP file stays unchanged on your device.

## STEP and STP support

Both common filename extensions open in the same viewer; you do not need to rename your CAD file.

## Look around the part

Inspect visible faces, openings, and the overall form from different angles.

## A local CAD preview

The browser prepares the display geometry locally. Your selected CAD file is not uploaded to our server.

## Limitations

- STEP import can take longer than loading a triangle mesh. Large assemblies may be too complex for browser memory, even below 50 MB.
- The tessellated preview is for visual inspection. It is not a CAD editor, dimensional inspection report, or manufacturing validation.

## Frequently asked questions

### Can I open an STP file in this STEP viewer?

Yes. The .step and .stp extensions identify the same CAD exchange format, and this viewer accepts both.

### Does viewing a STEP file change its CAD geometry?

No. The viewer creates a display mesh in your browser for navigation and visual inspection. It does not modify or overwrite the original STEP file.

### Can I edit CAD features in the online STEP viewer?

No. This tool displays the model so you can rotate and inspect it. Use a CAD application to change dimensions, edit solids, or prepare a manufacturing drawing.

## Related references

- [Pricing and credit costs](https://imageto3dprint.com/pricing.md)

- [AI content index](https://imageto3dprint.com/llms.txt)