CutForge Converter
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Free online 3D viewer for steel parts

A 3D DSTV viewer, NC1 3D viewer and STEP viewer online on one page: see what a CNC line will cut – NC1 (DSTV) files and STEP models converted by CutForge, shown in 3D with a realistic steel look. Rotate, section, measure and take a photo – right in your browser.

  • Realistic steel look
  • NC1 / DSTV & STEP
  • Photo button
  • Works on phone and tablet

Pick a demo model

All models are fictitious demo parts made up for this page – no customer data. Each one comes from a synthetic NC1 file that you can download.

The viewer loads about 1 MB of data only when you start it.

Download the NC1 file of this model Download NC1 file

Synthetic NC1 (DSTV) file – open it in your NC1 viewer or use it to test your own software.

Coming soon: open your own NC1 and STEP files in this viewer.

How to use the 3D viewer

  • Rotate, zoom, move. Mouse: left button rotates, wheel zooms towards the cursor, right button moves. Touch: one finger rotates, two fingers zoom and move. Double click (double tap) flies to a part.
  • Click a part. Selecting a part shows its mark, profile, steel grade, length, dimensions, mass and its NC1 file. The parts list on the left lets you search a part in an assembly.
  • Section. Cut the model with a plane along X, Y or Z and slide it through the part to look inside tubes and profiles.
  • Measure. Switch on Measure and tap two points – the viewer snaps to vertices and shows the distance and ΔX, ΔY, ΔZ in millimetres.
  • Photo. The Photo button renders the current view with a path tracer into a photo-like image that you can save as PNG (needs a graphics card with WebGL 2).

What you see in this 3D DSTV viewer

The models are built the same way CutForge builds them for your machine: from the NC1 (DSTV) file – profile, contour, holes, cut-outs, mitres and bends – into a solid with the real wall thickness and corner radii. Raw steel with mill scale is the default; the handrail is shown hot-dip galvanised. In the appearance panel you can switch to galvanised, painted RAL colours or stainless steel.

Only have DXF drawings?

CutForge Converter turns 2D DXF drawings of steel parts into NC1 (DSTV) files for CNC beam, drill and saw lines – automatically for most single-part drawings. Free trial with 30 DXF files.

Download free trial Open the free 2D NC1 viewer

Built with three.js, three-mesh-bvh and three-gpu-pathtracer (MIT licence), self-hosted – no third-party servers. Licences: three.js, three-mesh-bvh, three-gpu-pathtracer · README

3D viewer – questions

Is this 3D NC1 / DSTV viewer free?
Yes. The viewer and the demo models are free to use, with no sign-up and no cookies.
Can I open my own NC1 or STEP file?
Not yet. For now the page shows demo models made for it; opening your own NC1 and STEP files is coming soon. For 2D drawings of your own NC1 files use the free 2D viewer.
Are the demo parts real customer parts?
No. Every model on this page is fictitious and was made up for the demonstration, together with its synthetic NC1 file.
Does it work on a phone or tablet?
Yes. The viewer is touch-ready; the panels start collapsed on a phone so the model gets the whole screen. Photo needs WebGL 2 and a reasonably recent device.
What is the Photo button?
It renders the current view with a physically based path tracer in your browser and lets you save the picture as PNG. Nothing is uploaded.