Free Online GLB & glTF Viewer
Drop a .glb or .gltf file into your browser and inspect the 3D model — rotate it, zoom in, look inside. Nothing to install, and viewing a file is free and uses no credits. Want it on your own site? This is the same viewer you can embed with one line.
Drag a .glb / .gltf file onto the viewer above (or tap Upload) — it renders right here, free, nothing to install. STEP, IGES, BREP, DXF, OBJ, and STL work the same way. Want the full workspace? Open it in Studio.
What a GLB / glTF file is
glTF (GL Transmission Format) is the web-native standard for 3D models — often called “the JPEG of 3D” because it is built to load fast in browsers, game engines, and AR viewers. It carries not just geometry but materials, textures, and animations, so a model looks the same wherever it is opened.
.glb — one binary file
The binary container packs the JSON, geometry, and textures into a single self-contained file. That is why GLB is the format people share and embed.
.gltf — JSON + assets
The text form is human-readable JSON that usually points at separate .bin and texture files. Easier to hand-edit, but more files to move around.
Web & AR native
GLB is the format phones and AR apps already understand — it is what powers “view in your space” buttons on the web.
A display format
glTF describes a mesh for viewing, not the exact solid surfaces engineers machine from. For that, see STEP.
View in your browser or in AR
GLB is the 3D format the web and mobile already speak. Because everything — geometry, materials, textures — lives in one file, a phone can load it and drop it straight into augmented reality: the “view in your space” experience you have seen on product pages runs on GLB. Opening one here needs nothing but a browser:
- Just look at it — drop it into the viewer above. Fastest option, nothing to install, no cost.
- Check it on your phone — GLB is the mobile / AR native format, so the same file that renders here is ready for “view in your space” flows.
- Turn it into a real part — a GLB is a mesh; convert it toward solid CAD and export STEP for machining or STL / 3MF for printing.
Put this viewer on your own site
This is the reason most people come looking for a GLB viewer: they want one on their page. Run a marketplace, a product catalog, a portfolio, or a docs site? Drop this exact viewer on any page with one line — visitors view (and convert) GLB and other 3D files without ever leaving your site. Free, and customizable.
<script src="https://cdn.partwork.ai/viewer/partwork_viewer_widget.js" defer></script>
<div data-partwork-viewer data-theme="dark" style="width:100%;height:520px"></div>Set the model, colors, fonts, fixed-model, and viewer-only options on the embed page. Point it at a fixed .glb to showcase one product, or leave it open so visitors can upload their own.
What else you can open
The viewer is not GLB-only. It reads the whole 3D exchange stack, so the same page opens a mesh from a scanner or an exact CAD model from a machine shop:
| Format | Extensions | Typically comes from |
|---|---|---|
| GLB / glTF | .glb · .gltf | Web & AR 3D — game engines, product configurators, model marketplaces |
| STEP | .step · .stp | The universal CAD exchange format — see the STEP viewer |
| IGES | .iges · .igs | Older exchange format, still common from legacy systems |
| BREP | .brep · .brp | OpenCascade native boundary representation |
| DXF | .dxf | 2D profiles — laser, plasma, waterjet |
| OBJ | .obj | Triangle mesh, often from 3D scanning or sculpting |
| STL | .stl | 3D printing mesh — see the STL viewer |
Size limit 75 MB. Uploading and viewing a file costs nothing and uses no credits.
Common questions
What is a GLB file?
A 3D model in the glTF standard packed into one binary file — geometry, materials, textures, and animations all together. It is the web-native 3D format that browsers, game engines, and AR viewers load directly.
GLB vs glTF — what is the difference?
Same standard, two containers. .glb is a single self-contained binary; .gltf is JSON text that usually references separate .bin and texture files. GLB is easier to share and embed; glTF is easier to hand-edit. Both open the same way here.
How do I open a GLB file?
Drag it onto a browser-based viewer like this one — nothing to install. GLB is the format phones and AR apps already use, so most devices can display it without extra software.
Can I embed this viewer on my website?
Yes — that is what most GLB-viewer visitors actually want. It is the same widget, added with one script tag and a <div>. See the embed page for colors, fonts, fixed-model, and viewer-only options.
Does viewing cost anything?
No. Opening and inspecting a file uses no credits. Credits apply only to generating or modifying geometry.
Why will my file not open?
Most often it is over the 75 MB limit. Re-export a smaller GLB from whatever created it and it will open.
Open your file
Launch the viewer, drop your .glb or .gltf file in, and it renders in the 3D view. Free, in the browser, nothing to install.