# GLB to glTF Converter

> Unpack a GLB into readable glTF JSON to inspect nodes, meshes and materials, or to edit them by hand.

Page: https://printpal.io/convert/glb-to-gltf
Updated: 2026-11-12
Use it: open https://printpal.io/convert/glb-to-gltf in a browser and drop a file. Free, no account, files are processed locally and never uploaded.

A GLB is a binary container; the .gltf form is JSON you can open in any text editor. The converter writes a single .gltf with the buffers and textures embedded as data, so it stays one file while becoming readable.

The data is rebuilt from the loaded scene: meshes, materials and textures come across, Draco and Meshopt are decompressed, animations and skins are dropped. Units and axes are unchanged (metres, Y up), since both are glTF.

## How to convert GLB to glTF

1. **Drop your GLB files.** Drop .glb files, including Draco, Meshopt and KTX2 compressed ones.
2. **Check the preview.** The model appears at the size and orientation it will have. Fix the file units, up axis or size under Size, units and orientation if needed.
3. **Choose glTF options.** Written as a single .gltf with the buffers embedded, in metres and Y up.
4. **Convert and download.** One file downloads straight away. A batch gives a download per file and one .zip of all of them.

## What carries over

| | Result |
|---|---|
| Geometry | Every triangle is kept at full precision. |
| Color | Kept: materials, textures and vertex colors are embedded. |
| Units | Both are in metres, so sizes are unchanged. |
| Orientation | Both are Y up, so it stays the right way up. |
| Objects | Each part stays a separate object or mesh. |
| Animation | Dropped: the model is written in its rest pose. |

## GLB at a glance (glTF 2.0 binary)

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.

- **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 at a glance (glTF 2.0 JSON)

A .gltf is the readable JSON form of glTF 2.0. The geometry usually sits in a separate .bin file and textures in image files, which makes it easy to inspect and edit, and easy to break by moving one file.

- **Stores:** A JSON scene that points at .bin buffers and image files (or embeds them)
- **Color:** Full: textures, base colors and vertex colors
- **Units:** Metres, fixed by the spec
- **Up axis:** Y, fixed by the spec
- **File size:** JSON plus buffers; embedded base64 adds about a third
- **Opens in:** Web viewers, Blender, three.js, Babylon.js, game engines

## Tips

- **Separate .bin?** For a .gltf with a separate .bin and image files, use Blender's glTF exporter with "glTF Separate".
- **Large files** Embedded data is base64, about a third larger than the GLB.
- **Just looking?** The [GLB viewer](https://printpal.io/tools/glb-viewer) shows triangle counts, materials and size without converting.

## FAQ

### What is the difference between GLB and glTF?

The same glTF 2.0 data, as one binary file (GLB) or as JSON (.gltf), here with the data embedded.

### Are animations kept?

No. The converter writes static meshes, materials and textures.

### Why is the .gltf larger?

Binary data is stored as base64 text inside the JSON, which adds about 33%.

### Is the converter free? Are there limits?

Free, with no sign-up, watermark or file count limit. Batches and files of a few hundred MB work on most laptops; the only limit is your device's memory.

### Are my files uploaded?

No. Files are read and written by JavaScript and WebAssembly in your browser and never sent to PrintPal. The STEP and IGES reader is the only extra download, once, from a public CDN.

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