glTF/GLB Compressor

Free Online 3D Model Compressor

compress

Drag & drop glTF or GLB files here, or browse

Compress with DRACO, Meshopt, or Quantization

How It Works

Add 3D model files Drag and drop glTF or GLB files. Multiple files can be compressed at once.
Choose compression method Select DRACO for best compression, Meshopt for GPU-friendly output, or Quantize for lightweight optimization.
Adjust settings Fine-tune quantization levels to balance file size vs. visual quality.
Download Download compressed models with before/after size comparison.

Features

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Private & Secure All compression happens in your browser using WebAssembly. Your 3D files are never uploaded to any server.
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DRACO Compression Google's mesh compression library. Achieves the best file size reduction, ideal for static models on the web.
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Meshopt Optimization Optimizes mesh data for GPU efficiency. Good balance of compression ratio and fast decode on the client.
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Quantization Control Adjustable position and normal quantization levels let you fine-tune the tradeoff between size and precision.
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Batch Processing Compress multiple 3D models at once and download them individually or as a ZIP.
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Size Comparison See before and after file sizes with percentage reduction for each compressed model.

Supported Formats

glTF
GLB

FAQ

What compression methods are available?

Three methods: DRACO (Google's mesh compression - best size reduction), Meshopt (GPU-friendly optimization), and Quantize (reduces vertex precision - lightweight, no decoder needed).

Will compression affect visual quality?

With default settings, visual differences are imperceptible. Lower quantization values produce smaller files but may introduce visible artifacts in high-precision models. Use the sliders to find the right balance.

Do I need a special decoder for compressed files?

DRACO-compressed files require a DRACO decoder (built into Three.js and most web 3D frameworks). Meshopt requires a meshopt decoder. Quantized files need no special decoder - they work everywhere glTF is supported.

Which compression method should I choose?

DRACO is best for smallest file size (typically 50-90% reduction). Meshopt is best when you need fast GPU decode. Quantize is best for broad compatibility with no decoder dependency.

Can I compress animated models?

Yes. All compression methods preserve animations. DRACO compresses mesh geometry while leaving animations intact.