View and analyse 3D models in your browser
Modelyser is a free online viewer for STL, STEP, OBJ, 3MF, PLY and GLB. Drop in your file, check dimensions and find out whether your model is ready to print.
No account needed. Your file stays on your own computer.
Open the viewerRuns in your browser
No installation needed. Your model is processed locally and never uploaded to a server.
Dimensions and volume
Instantly see X, Y and Z dimensions, triangle count and estimated volume.
Orient for printing
Rotate and lay your model flat on a face so you can see how it sits on the build plate.
Check printability
Inspect overhangs and visualise wall thickness as a heatmap for better prints.
Measure inside the viewer
Click points, diameters or axes to measure distances accurately.
Hide parts
For multi-part models you control which parts are visible.
What is Modelyser for?
Modelyser is built for anyone who wants to inspect a 3D model quickly without firing up heavy CAD software. Whether you want to check an STL for your 3D printer, review a STEP file from a supplier or know the volume of an OBJ model, it all happens in your browser.
After opening a model you instantly see dimensions, triangle count and an estimated PLA weight. You can hide parts, rotate the model for the best print orientation and run an analysis to check overhangs and wall thickness.
Your file stays yours
Modelyser runs entirely in your browser. Your model is not sent to a server and you do not need an account. Perfect for confidential designs or a quick check without installing software.
- No account needed
- No sign-in
- Nothing uploaded to a server
- Works on desktop and tablet
Frequently asked questions
Is Modelyser free?
Yes, the viewer is completely free to use. You do not need an account.
Which file formats are supported?
STL, OBJ, STEP, STP, 3MF, PLY, GLB and GLTF. Both binary and ASCII STL files work.
Is my model uploaded to a server?
No. The file is processed locally in your browser. It never leaves your device.
Can I view models with multiple parts?
Yes. STEP and OBJ files with multiple parts are read in and you can toggle the visibility of each part.
Does Modelyser work on my phone?
The viewer works best on desktop or tablet. The interface is harder to use on small phone screens.
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Get started now
Drop your model into the viewer or click to choose a file. Within seconds you'll see all the details.
Open the viewer