Free 3D Model & STL Viewer

Open your STL, OBJ, 3MF and PLY files in the browser; measure, scale, rotate and download as STL. Your file is never uploaded to a server — your privacy is protected.

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Drag or select your model STL · OBJ · 3MF · PLY · STEP · IGES · DXF
Your file is processed in your browser, never uploaded to a server

Once you load a model, its dimensions, volume and editing tools will appear here.

The viewer estimate is approximate; the final print price is determined by infill/walls/supports in the price calculator. Everything runs in your browser; your files are never uploaded.

Free 3D model viewer that runs in your browser

Want to check your model before sending it for 3D printing? With this free STL viewer you open your model file directly in your browser; you can see its real dimensions (width, depth, height), its volume and estimated weight, and rotate and zoom to inspect it from every angle. Your file is never uploaded to a server — it is processed entirely on your own device.

Which formats can I open?

STL — the most common 3D printing format (binary and ASCII)
OBJ — versatile mesh format
3MF — modern 3D printing format
PLY — scan/mesh format
STEP / IGES — engineering CAD formats
DXF — 2D technical drawing

STEP / IGES (engineering CAD) and DXF (2D technical drawing) files are supported too; when a STEP/IGES file is opened, the CAD engine loads in a few seconds the first time.

Mini editor: scale and re-download

Beyond viewing, you can also do simple editing: you can scale the model to your desired longest-edge dimension (mm), rotate it in 90° steps, and download the edited version as STL. As the dimension changes, the volume and weight estimate update instantly.

Find out the printing price

If you like your model, you can upload it to our instant price calculator to see a transparent per-gram price within seconds and order online. At ucuz3D we print with 17 FDM materials, in 1 business day, with payment after approval.

Frequently Asked Questions

Is it safe to upload my STL file?

Yes. The viewer runs entirely in your browser; your file is not sent to any server and never leaves your device.

Which file formats can I open?

For now you can open STL, OBJ, 3MF and PLY formats. STEP/IGES and DXF support will be added soon.

Can I scale the model and download it?

Yes. You can set the longest edge to your desired dimension in millimeters, rotate it, and download the edited model as STL.

Are the weight and volume in the viewer accurate?

The dimensions and volume are calculated from the model; the weight is an estimate assuming 100% infill. For a final price that accounts for infill, walls and supports, use our price calculator.

How do I find out the printing price?

Upload your model to our instant price calculator; you will see a transparent per-gram price right away and can order online.