STEP viewer online

Open STEP files in your browser. Measure distances and holes, cut a section, check it is watertight, and see the print weight. No install, nothing uploaded.

Good to know

A STEP file is exact geometry, so it has to be turned into triangles to draw. That happens in your browser, with OpenCascade, the same kernel FreeCAD uses. Nothing is uploaded.

How it works

  1. 1Drop a STEP file in the box above. It opens in your browser; nothing is uploaded.
  2. 2Drag to orbit, scroll to zoom, right-drag to pan. Front, Top and Side square the camera up.
  3. 3Ruler gives the distance between two points. Face reads the size of a flat face or the diameter of a hole.
  4. 4Section cuts across the height, width or depth to show walls and hollows. Size draws the bounding box.
  5. 5The panel gives the size in millimeters and the volume.

Show a model on your site or repo

Paste the address of a STEP file that is online, such as one in a GitHub repo, and copy what you need. The file stays where it is: each visitor's browser reads it from there.

View in 3DThe badge, as it shows in a README

README badge (Markdown)

For a GitHub or GitLab README.

[![View in 3D](https://www.voloomcad.com/badges/view-in-3d.svg)](https://www.voloomcad.com/tools/step-viewer?url=https%3A%2F%2Fexample.com%2Fpart.step)

Embed on a site (HTML)

The viewer with measuring and section, inside your page.

<iframe src="https://www.voloomcad.com/embed/viewer?url=https%3A%2F%2Fexample.com%2Fpart.step" width="100%" height="420" style="border:0" allow="fullscreen" loading="lazy" title="3D model"></iframe>
<p><a href="https://www.voloomcad.com/tools/step-viewer">STEP viewer</a> by Voloom</p>

Link

https://www.voloomcad.com/tools/step-viewer?url=https%3A%2F%2Fexample.com%2Fpart.step

It works when the host lets other sites read the file: GitHub, GitLab and most direct download links do. Printables and Thingiverse do not.

About STEP

STEP (ISO 10303 STEP). The ISO standard for exchanging exact CAD solids. Faces are true curves, not triangles, so another CAD program can edit and dimension them.

Units: Explicit. Usually millimeters. Up axis: Z. Opens in Fusion, SolidWorks, Onshape, FreeCAD, and Inventor.

Questions

Can I measure a STEP file?
Yes. Ruler measures between any two points, snapping to corners and edges, and splits the distance into X, Y and Z. Face reads a flat face's width and length, or a hole's diameter. Readouts are in millimeters.
Can I show a model on my site or in a GitHub README?
Yes, when the file is online somewhere that lets other pages read it, such as GitHub. Paste its address under "Show a model on your site or repo" for a README badge, an embed for your site, or a plain link. Printables and Thingiverse do not allow it, so download the file and drop it in here.
Do I need to install anything to open STEP?
No. It runs in any modern browser, on desktop or phone.
Is my file uploaded?
No. The file is read and converted in your browser. It never reaches our servers.
Is the STEP viewer free?
Yes, with no limit and no account.
What else opens STEP files?
Fusion, SolidWorks, Onshape, FreeCAD, and Inventor.

Related tools

All tools