A GLB file is the binary form of glTF 2.0, a standard format for 3D scenes and models. It packs the glTF JSON description, binary geometry and animation buffers, and embedded textures into a single file, which makes it ideal for the web, AR/VR, and game engines.

How do I see what is making my GLB file so large?

Open the GLB in GLB Inspector at glbinspect.qwee.ai. It parses the container locally and shows a storage-composition breakdown of exactly how many bytes go to geometry, textures, animation, skinning and padding, so you can see what to optimize.

Is GLB Inspector free and private?

Yes. GLB Inspector is completely free and runs entirely in your browser. Your model is never uploaded to a server — all parsing, previewing and editing happens locally on your device.

Can I reduce the size of a GLB file online?

Yes. GLB Inspector lets you select and delete meshes you do not need, prunes unused data, decompresses Draco/Meshopt geometry, and re-exports a smaller GLB — all without uploading the file.

Do I need to install anything to inspect a glTF or GLB model?

No installation is required. GLB Inspector is a single web page. Just open glbinspect.qwee.ai in a modern browser and drop in a .glb file.

GLB Inspector — Free glTF 2.0 / GLB Viewer & Size Analyzer

Drop a GLB to inspect it

See the weight of geometry, animation and textures — plus a visual preview. Choose a file

01 // Storage composition

Asset

Scene hierarchy // referenced binary buffer views

02 // 3D Preview

Current:

Preparing preview…

03 // Scene data

Asset workspace

The outliner is the source of truth. Inspect material slots and textures in context.

0 meshes 0 materials 0 textures

Linked resources

Textures

All embedded textures

Compress

Resize

Output format

Keep formats Preserve JPEG, PNG and WebP

Format settings

WebP quality

82%

Surface properties

Material slots

All asset materials

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Master view

Scene outliner

Expand a mesh to inspect its material slots.

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