WebTech360 Viewer
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Open STL files online

View and orbit common 3D models from 3D printing, games and modelling — drag to rotate and scroll to zoom. Three.js loads STL, OBJ, glTF/GLB and PLY entirely in your browser.

Interactive viewer — This format is parsed and rendered in the browser.

Drop a STL file to open it

or click to choose — everything stays on your device

Choose file

🔒 100% private — files never leave your browser

Sample files for 3D models

Choose an extension below to open a ready-made sample in the viewer or download it for your own testing.

webtech360-stl-sample.stl

See how 3D models works with this ready-made sample. Open it in the viewer or download the original STL file for your own testing.

Download sample .STL

webtech360-obj-sample.obj

See how 3D models works with this ready-made sample. Open it in the viewer or download the original OBJ file for your own testing.

Download sample .OBJ

webtech360-crystal.glb

See how 3D models works with this ready-made sample. Open it in the viewer or download the original GLB file for your own testing.

Download sample .GLB

webtech360-gltf-sample.gltf

See how 3D models works with this ready-made sample. Open it in the viewer or download the original GLTF file for your own testing.

Download sample .GLTF

webtech360-ply-sample.ply

See how 3D models works with this ready-made sample. Open it in the viewer or download the original PLY file for your own testing.

Download sample .PLY

Or turn STL into an image — snapshot the preview, add arrows or notes, and download a PNG.

What is a STL file?

View and orbit common 3D models from 3D printing, games and modelling — drag to rotate and scroll to zoom. Three.js loads STL, OBJ, glTF/GLB and PLY entirely in your browser. The .STL extension identifies a 3D model file, which is served with the model/gltf-binary media type. You can open it here instantly — drop the file into the box above and it renders in your browser. Nothing is uploaded.

Besides this free online viewer, you can open 3D models files in desktop apps such as Blender, MeshLab, Windows 3D Viewer — but here all you need is a web browser.

Quick facts

Format3D models — 3D model
File extensions.stl .obj .glb .gltf .ply
MIME typemodel/gltf-binary
Developervarious
Category3D, CAD & GIS
Also opens inBlender, MeshLab, Windows 3D Viewer

How to open a STL file online

  1. Click Choose file above, or drag your STL file onto the box.
  2. The right viewer loads automatically and renders your file.
  3. Read, scroll or page through it. To open a different file, choose Open another file.

100% private — files never leave your browser.

Libraries used to render STL in the browser

This viewer is built entirely with open-source JavaScript that runs in your browser:

Frequently asked questions

What is a .STL file?

A .STL file is a 3D model, identified by the model/gltf-binary media type. You can open and read it instantly in the viewer above without installing anything.

What programs open STL files?

On the desktop, STL files typically open in Blender, MeshLab, Windows 3D Viewer. Online, this page opens them in any modern browser — nothing to download.

How do I convert STL to an image?

Use Snapshot to capture the STL preview, optionally add arrows, text or highlights, then download it as a PNG image.

Is it safe to open my STL file here?

Yes. The file is read and rendered entirely by JavaScript inside your own browser. It is never uploaded to a server, so nothing leaves your device.

Do I need to install anything to view a STL file?

No. There is nothing to install and no account to create. Open the page, drop your file, and it displays instantly.

Does it work on my phone or iPad?

Yes. The viewer is fully responsive and works in modern mobile and tablet browsers such as Safari and Chrome.

Is there a file size limit?

There is no hard limit, but very large files depend on your device’s memory. Big files are processed in the background so the page stays responsive.

.fbx FBX 3D model .dae COLLADA (DAE) .usdz USDZ .vox MagicaVoxel (VOX) .3mf 3MF .pcd PCD / XYZ point cloud .wrl VRML (WRL) .sldprt SolidWorks (SLDPRT/SLDASM/SLDDRW) .3dm Rhino 3D (3DM) .dwg AutoCAD (DWG/DWT) .dxf AutoCAD (DXF) .step STEP / IGES .brep Open CASCADE BREP .ifc IFC (BIM) .gcode G-code .las LiDAR (LAS) .laz Compressed LiDAR (LAZ) .geojson GeoJSON / KML / GPX .shp Shapefile (SHP) .geotiff GeoTIFF All formats →