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
How 3D Model Viewer — STL, OBJ, GLTF Works
View STL, OBJ, GLTF, and GLB 3D models in your browser for Rotate, zoom, take screenshots — completely your file never leaves your device. Use the tool above to get your results instantly — everything runs in your browser with no data sent to any server.
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.
Frequently Asked Questions
What 3D file formats are supported?
The viewer supports STL (binary and ASCII), OBJ, GLTF, and GLB files. STL is common for 3D printing, OBJ for general 3D modeling, and GLTF/GLB for web and game assets.
Is my file uploaded to any server?
No. Your 3D file never leaves your browser. The viewer uses the FileReader API to read the file locally and Three.js to render it. You can verify by checking the Network tab in developer tools — no file data is sent anywhere.
Can I take a screenshot of my 3D model?
Yes. Click the Screenshot button in the toolbar to capture the current view as a PNG image. It downloads instantly to your device.
What is an STL file?
STL (Stereolithography) is a file format that describes the surface geometry of a 3D object using triangular facets. It is the most common file format for 3D printing and rapid prototyping. STL files contain only geometry — no color, texture, or material information.
What is GLTF format?
GLTF (GL Transmission Format) is a royalty-free 3D file format developed by the Khronos Group. Often called the JPEG of 3D, it supports geometry, materials, textures, animations, and scene hierarchies. GLB is the binary version that packs everything into a single file.
How do I rotate, zoom, and pan the model?
Left-click and drag to rotate the model. Scroll the mouse wheel to zoom in and out. Right-click and drag (or two-finger drag on trackpad) to pan the view. Click Reset View to return to the default camera position.