STL Viewer Online
Drop a 3D model to see it at once: turn, pan and zoom, measure between two points, show the wireframe, normals and bounds, play glTF animations and save a screenshot. STL, OBJ, PLY, GLB, glTF and 3MF. No account and no upload.
STL Viewer, OBJ, GLB & glTF Preview for VS Code and Cursor, free
Opens a model the moment you click it in the Explorer, finds the .bin, textures and .mtl next to it, and reloads when the file changes.
Optional Zovo Pro, USD 19 once: print check, section view and turntable GIF.
Drop a 3D model here
or
STL (binary and ASCII), OBJ with MTL, PLY, GLB, glTF and 3MF, up to 1 GB. For a glTF or OBJ, pick its .bin, .mtl and texture files together with it.
Print check, Section view and Turntable export are Zovo Pro tools in the STL Viewer extension. See the Zovo Pro card below.
Open this in VS Code or Cursor
The same viewer runs inside VS Code and Cursor. There it opens a model the moment you click it in the Explorer, finds the .bin, textures and .mtl next to it, and reloads when your CAD or code writes the file again.
Free, MIT license. About STL Viewer, OBJ Viewer, GLB & glTF Viewer for VS Code.
Zovo Pro
Print check, section view and turntable GIF. Zovo Pro, USD 19 once.
In the STL Viewer extension, Zovo Pro checks a part before you slice it (volume, weight, filament and cost, watertight check with open and flipped edges marked), cuts the model with a section plane and saves the cut as SVG, and saves a 360 degree turntable as a GIF or PNG frames. Each Pro tool works 3 times for free. One payment covers the Pro tools in 22 Zovo extensions. Everything that is free stays free.
After a card payment you get a key on the page. With GitHub Sponsors you sign in from the extension. Details on the Zovo Pro page.
Related tools
- STL Viewer, OBJ, GLB & glTF Preview on the VS Code Marketplace (also on Open VSX). Opens STL, OBJ, PLY, GLB and glTF models in VS Code, beside the code.
- STL Viewer, OBJ Viewer, GLB & glTF Viewer. Opens 3D models in VS Code, beside the code.
- G-code Viewer. Shows CNC and 3D printer toolpaths in VS Code.
- DXF Viewer. Opens DXF CAD drawings in VS Code.
- DXF Viewer Online, free in your browser.
- SVG to PNG Converter, free in your browser.
- Hex Viewer Online, free in your browser.
Questions
Is my model uploaded anywhere?
No. The page reads the file inside this tab and three.js draws it here. The page CSP sets connect-src to none, and the viewer frame may only read the files you picked, from memory. Open the Network tab of your browser tools and you will see no request when a model opens.
Which files does it open?
STL in binary and ASCII form, OBJ (with its MTL materials), PLY meshes and point clouds, GLB and glTF 2.0 (with embedded or separate buffers and textures) and 3MF, up to 1 GB. Draco, meshopt and KTX2 compressed glTF files are named in a clear message.
My glTF or OBJ shows no textures. What do I do?
A .gltf file often points to a .bin file and texture pictures, and an OBJ to an .mtl file. Pick all of them at once (or drop them together), and the viewer finds each one by its name. A GLB has everything inside, so one file is enough.
Can I measure the model?
Yes. Click Measure, then two points on the surface, to get the distance in the model units. The panel shows the size of the bounding box, the triangle and vertex counts and the scene tree. Y up or Z up can be switched for files from CAD and slicers.
Can I save a picture of the model?
Yes. Screenshot saves the current view as a PNG to your downloads, with the background you picked. The model file itself is never changed.
Does it work offline?
Yes. After the first visit the page keeps a copy of its own files, so it opens models with no connection.
What is free and what is Zovo Pro?
Viewing, measuring, wireframe, normals, bounds, the scene tree, animations and screenshots are free here and in the VS Code extension. The print check, section view and turntable export are Zovo Pro in the extension. One USD 19 payment covers the Pro tools in every Zovo extension.