GLB Optimizer
FREEOptimize 3D GLB models for faster loading. Reduce file sizes by up to 70% with mesh compression and Draco encoding.
How It Works
Upload Your GLB File
Upload a GLB/glTF 3D model from your 3D software, AI generator, or existing asset library. Supports files up to 100MB.
Configure Optimization
Choose compression options: Draco mesh encoding, texture format (WebP, AVIF, JPEG), texture size limits, and geometry simplification.
Download Optimized Model
Get your optimized GLB file with reduced file size while maintaining visual quality. Save to Sirv CDN for fast global delivery.
GLB Optimization Features
Draco Compression
Industry-standard mesh compression reduces geometry data by 80-90% with minimal visual impact. Compatible with Three.js, Unity, and all major viewers.
Texture Optimization
Convert textures to modern formats (WebP, AVIF) with Sharp for high-quality compression. Resize large textures to reduce file size.
Geometry Simplification
Reduce polygon count with meshoptimizer's simplification algorithm. Adjustable ratio preserves detail where it matters.
Deduplication
Remove duplicate vertices, materials, and textures. Prune unused data that bloats file size without visual benefit.
Mesh Instancing
Enable GPU instancing for repeated geometry. Reduces draw calls and improves rendering performance.
Vertex Welding
Merge nearby duplicate vertices to reduce mesh complexity while preserving smooth normals and UVs.
Scene Graph Optimization
Flatten node hierarchy and join separate meshes to reduce scene complexity and improve load times.
Free Tool
No credit cost or usage limits. Process as many models as you need, completely free.
Technical Specifications
Optimization Techniques
Choose the right settings for your use case
| Feature | Web DeliveryRecommendedFastest loading | Mobile/ARPerformanceLow memory usage | High QualityVisualMaximum detail | UniversalCompatibleWidest support |
|---|---|---|---|---|
| Draco Compression | ||||
| Texture Format | WebP | WebP | PNG/AVIF | JPEG |
| Max Texture Size | 2048px | 1024px | 4096px | 2048px |
| Geometry Detail | 100% | 50-75% | 100% | 100% |
| Best For | E-commerce, portfolios | AR apps, mobile games | Presentations, renders | Legacy viewers |
Compatible with all 3D platforms
Optimized GLB files work everywhere
Perfect For
E-commerce Product Viewers
Reduce 3D product model sizes for faster page loads. Optimized GLB files improve Core Web Vitals and conversion rates.
Web-based 3D Experiences
Prepare 3D assets for WebGL applications, configurators, and interactive web experiences with minimal load times.
AR/VR Applications
Optimize models for augmented and virtual reality apps where file size impacts download speed and memory usage.
Game Development
Reduce asset sizes for faster game downloads and better runtime performance on mobile and web platforms.
AI-Generated 3D Models
Optimize models from AI tools like Meshy, Trellis, or Seed3D that often output unoptimized geometry.
3D Portfolio Sites
Make your 3D portfolio load faster with optimized models that maintain visual quality.
Frequently Asked Questions
GLB optimization reduces 3D model file sizes through techniques like Draco mesh compression, texture resizing and format conversion, and removing duplicate data while preserving visual quality. A typical model can be reduced by 50-80%.
Yes! This tool is completely free with no credit cost or usage limits. Processing happens on our servers using Sharp for high-quality texture compression.
Draco is Google's open-source library for compressing 3D meshes. It significantly reduces geometry data size (80-90%) with minimal visual impact. Most modern 3D viewers support Draco, including Three.js, Unity, and model-viewer.
The default settings preserve visual quality while reducing file size. Draco compression is visually lossless. Texture compression uses high-quality WebP. You can adjust simplification ratio if you need to balance quality vs. file size.
WebP offers the best balance of quality and compression for web delivery. AVIF provides even smaller files but has less browser support. JPEG is good for photos without transparency. PNG preserves transparency but has larger file sizes.
Some older viewers don't support Draco compression. Disable the Draco option to output standard GLB files. Note that file sizes will be larger without Draco compression.
Simplification reduces polygon count while preserving the overall shape. A 50% setting keeps roughly half the triangles. Lower values create smaller files but may lose fine details. The algorithm prioritizes keeping visually important edges.
AI 3D generators often output models with unoptimized geometry and large textures. This tool is perfect for preparing AI-generated models for web or game use, often reducing file sizes by 70% or more.