GLB Viewer

Open GLB files from AI generators, Sketchfab, Blender or your web app. Textures, PBR materials and compressed meshes at real size, with a check that tells you whether it will print.

  • Files stay on your device
  • Free, no sign-up
  • Mesh check and printer fit
  • 14 formats

Drop a GLB file to view it

or

STL · STEP · OBJ · 3MF · GLB · glTF · PLY · FBX · DAE · 3DS · AMF · IGES · VRML · ZIP

Opens on your device. Nothing is uploaded.

How to open a GLB file online

  1. Open the file

    Drop .glb files, including Draco, Meshopt and KTX2 compressed ones.

  2. Check size and orientation

    The model stands on the plate in millimetres. Switch to inches, or change the file units or up axis if it looks wrong.

  3. Run the checks

    Read the mesh check, pick your printer to see whether it fits, and use Measure (M) or Section (X) for a closer look.

  4. Save or convert

    Take a PNG screenshot, or save the model as STL, 3MF, OBJ, GLB, PLY or USDZ.

What you can check in GLB files

  • Textures, PBR materials, vertex colors and multiple meshes
  • Draco, Meshopt and KTX2 compressed files
  • Size in mm or inches, converted from glTF metres
  • Watertight check: AI and scanned models often have holes
  • Save as STL, 3MF, OBJ with textures, or USDZ for iPhone AR

About GLB files

GLB is glTF 2.0 packed into one binary file: meshes, materials, textures and animation together. It is the default download from AI 3D generators and most web 3D tools. The viewer reads Draco and Meshopt compressed meshes and KTX2 textures, the three things that make simpler viewers fail on optimized files.

glTF is defined in metres with Y up, so the viewer converts it to millimetres and Z up on a build plate: a 0.12 m figure shows as 120 mm, the size a slicer will use if you save it as STL or 3MF. AI generators often export at an arbitrary size, a metre or two across, so check the readout before you print.

GLB at a glance

glTF 2.0 binary · .glb

Stores
Meshes, PBR materials, textures, animation and scenes in one binary file
Color
Full: textures, base colors and vertex colors
Units
Metres, fixed by the glTF spec
Up axis
Y, fixed by the spec
File size
Compact; Draco or Meshopt compression shrinks meshes 5 to 10 times
Opens in
Web viewers, Blender, Windows, Android Scene Viewer, Godot, Unity and Unreal importers

glTF 2.0 is the Khronos Group's "JPEG of 3D", and GLB is its single-file binary form. It is what AI 3D generators, Sketchfab downloads and web apps hand out, and it is the only common format whose units (metres) and axes (Y up) are fixed by the spec.

Tips for GLB files

Animated GLB?

The viewer shows the model in its rest pose; animations are not played.

Huge textures

Textures are decoded on your device, so a 200 MB GLB opens on most laptops but may struggle on older phones.

Print it in color

The AMS converter turns textures into 2 to 8 filament colors for a multi-color printer.

GLB viewer FAQ

What is a GLB file?
A binary glTF 2.0 file: a 3D model with its materials and textures in one file. It is used on the web, for AR on Android, in game engines and by AI 3D generators.

How do I open a GLB file on Windows or Mac?
Drop it on this page in any modern browser. No app is needed and the file stays on your computer.

Can I 3D print a GLB file?
Yes, after converting: save it as STL or 3MF here, or use GLB to STL. Textures don't print on a single-color printer.

Is the viewer free? Are there limits?
Free, with no sign-up, watermark or file limit. The practical limit is your device's memory: files of a few hundred MB open on most laptops.

Are my files uploaded anywhere?
No. Files are read by JavaScript and WebAssembly in your browser and never sent to PrintPal. Only the code is downloaded, and the STEP and IGES reader once, from a public CDN.