Free tool

Online 3D viewer

Inspect STEP, STL or OBJ in your browser — measure, section, wireframe and overall size.

Restoring your model…

Loading the last file from local cache.

No installLocal cache keeps your part after refreshStart a quote in one click

Inspect CAD and mesh files in your browser

Free online 3D viewer for STEP, STL, OBJ, 3MF, IGES and more — no install. Rotate, zoom, measure, section and check overall size before you request a CNC or 3D-printing quote.

What you can do

Supported formats

Open STEP/STP, STL, OBJ, 3MF, PLY and IGES/IGS. CAD files are converted for preview; mesh formats load directly in the browser.

Measure & section

Distance tools, wireframe mode and cutting planes help you validate thickness, holes and clearances before manufacturing.

Local cache

Your model stays available after a page refresh thanks to a local cache — fewer re-uploads and faster revisits.

Straight to a quote

Happy with the part? Continue to a Lusinage quote request with the same file workflow used for machining and 3D printing.

How to use the online 3D viewer

  1. Choose or drop a 3D file (STEP, STL, OBJ…).
  2. Inspect the model: orbit, zoom, wireframe, section.
  3. Measure critical dimensions and check bounding box.
  4. Optional: start a quote without leaving the site.

Frequently asked questions

Is the Lusinage 3D viewer free?

Yes. Viewing STEP, STL, OBJ and other supported formats in the browser is free, with no software install.

Can I open STEP files online?

Yes. STEP/STP files are converted for browser preview so you can inspect CAD geometry without SolidWorks or Catia.

Do I need an account?

No account is required to view a file. An account helps if you continue to a quote or manage projects.

Is my file stored on your servers?

Mesh previews can use a short-lived conversion for CAD formats. The public tool also keeps a local browser cache so refresh does not wipe your current part. Files used for quotes follow Lusinage privacy rules.

Which formats work best?

STL and OBJ load quickly for meshes. STEP is ideal for CAD inspection before machining. 3MF, PLY and IGES are also supported.

Need the part manufactured?

Upload the same model on our quote page for CNC machining or 3D printing.

Get a quote