3D Model Viewer — STL, OBJ, GLTF
Upload any STL, OBJ, GLTF, or GLB file and view it in 3D right in your browser. Rotate, zoom, pan, toggle wireframe, and take screenshots. Your file never leaves your device — everything runs locally using Three.js and the FileReader API.
Click to upload or drag & drop a 3D file
Supports .stl, .obj, .gltf, .glb
Model Info
View 3D Models Online — Free, Private, No Upload
Whether you are a 3D printing enthusiast checking an STL file before printing, a game developer previewing GLTF assets, or a designer reviewing OBJ models, this tool lets you inspect 3D files instantly without installing any software. Unlike other online 3D viewers, your file never leaves your browser — it is processed entirely on your device using the JavaScript FileReader API and rendered with Three.js.
Supported 3D File Formats
Format Guide
- STL (Stereolithography) — The standard format for 3D printing. STL files describe surface geometry using triangular meshes. Both binary and ASCII STL files are supported. STL contains only geometry — no color, texture, or material data.
- OBJ (Wavefront) — A widely used general-purpose 3D format supported by nearly every 3D modeling program including Blender, Maya, and 3ds Max. OBJ files can contain vertex positions, normals, and texture coordinates.
- GLTF (GL Transmission Format) — Often called the "JPEG of 3D," GLTF is a modern, royalty-free format designed for efficient transmission of 3D content on the web. It supports meshes, materials, textures, animations, and scene hierarchies.
- GLB (Binary GLTF) — The binary version of GLTF that packages geometry, textures, and metadata into a single compact file. Ideal for web delivery and AR/VR applications.
How to Use the 3D Viewer
Click the upload area or drag and drop your 3D file. The viewer automatically detects the file format from its extension and uses the appropriate Three.js loader. Once loaded, the camera automatically frames the model so you can see it in full. Use your mouse to interact: left-click and drag to rotate, scroll to zoom, and right-click drag to pan. The toolbar provides additional controls — toggle wireframe mode to inspect mesh topology, reset the camera to the original position, or capture a screenshot as a PNG image.
Privacy-First Design
Many online 3D viewers upload your file to their servers for processing. This tool takes a fundamentally different approach. Your file is read using the browser's FileReader API and rendered locally with WebGL via Three.js. No data is transmitted to any server. This makes it safe to preview confidential CAD models, proprietary product designs, and any other sensitive 3D files. You can even disconnect from the internet after loading the page and the viewer will still work.
Use Cases
3D printing enthusiasts use this to preview STL files before sending them to a slicer. Game developers inspect GLTF and GLB assets before integrating them into engines. Product designers review OBJ exports from CAD software. Students explore 3D model files from online repositories. Engineers verify that exported meshes look correct before sharing with clients. Whatever your use case, this viewer gives you a quick, private way to check any 3D file.
Model Statistics
After loading a model, the viewer displays key statistics including vertex count, face count, and bounding box dimensions (width, height, depth). These numbers help you understand the complexity and physical scale of your model — useful for estimating 3D print time, file optimization, or verifying export accuracy.