📦OptimizeGLB
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📦OptimizeGLB

Free browser-based compression for GLB and glTF files.

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© 2026 OptimizeGLB

TermsPrivacy
New
Large files now supported

Compress GLB and glTF files locally

Tune textures and geometry in your browser, compare the result, and download it directly.

optimizeglb.com is fully free to use, try now

Click to upload or drag and drop

GLB, or GLTF with its .bin and texture files

No account required for local compression.

Your selected model files are processed on this device, not uploaded for compression.

Advanced options

Compression settings with texture quality, mesh optimization, and compatibility controls for balancing file size and visual quality.

Loading time

Smaller model downloads can improve loading time. Measure the optimized model in your target scene and devices.

Reduce runtime workload

Texture resizing and optional mesh simplification can reduce texture memory and geometry work in the target runtime.

Compatibility controls

Choose conservative settings or enable extensions such as Draco only when your target loader supports them.

Local model processing, free to use
Browser-only

Compression runs locally in your browser using WebAssembly. Model files you select are not uploaded to OptimizeGLB for processing.

There is no account, credit balance, or service-side usage quota. Practical file size and speed depend on your browser memory and device.

Why Choose OptimizeGLB?

  • Adjustable CompressionChoose conservative settings or opt into lossy texture and mesh changes, then inspect the result before shipping it.
  • Direct ProcessProcessing runs in your browser without model upload round-trips; duration depends on the model and device.
  • Open-source FoundationThe optimization pipeline uses glTF Transform, with output based on the open glTF 2.0 format.

Enhance Your 3D Workflow

OptimizeGLB is a practical choice for developers, designers, and 3D artists managing file-size constraints across web, gaming, AR, and VR projects.

Support & Custom Requests

Found an issue? Select Need help? for the fastest response, or email support@optimizeglb.com.

Need a custom optimization pipeline or high-volume local workflow? Get in touch.

You can also DM @antonyadhiban on X.

Guides and comparisons

Learn how the settings work and compare local and hosted workflows.

GLB tool comparison

Compare processing location, access, formats, and published features.

View comparison →

Compression options

Understand texture, geometry, compatibility, and lossy settings.

Read documentation →

Local vs hosted

Privacy and performance differences explained.

Read comparison →

Optimize for your exact 3D workflow

Compression settings are only safe when the destination can decode them. Pick your framework, engine, or publishing pipeline for a tested workflow and compatibility checklist.

Three.js

Optimize GLB for Three.js

Configure Draco, Meshopt, and KTX2 correctly, package sidecars, and measure real browser performance.

Read guide →

Babylon.js

Optimize GLB for Babylon.js

Compare Draco, WebP, and KTX2 against a core-format control, including mobile decode time and texture memory.

Read guide →

React Three Fiber

Optimize GLB for React Three Fiber

Prepare one reviewed delivery GLB for useGLTF and gltfjsx without adding a second, hidden transform pass.

Read guide →

Blender

Blender to optimized GLB

Prepare a clean scene, export a portable baseline, optimize once, and validate materials and animation.

Read guide →

Shopify

Optimize 3D models for Shopify

Balance product detail, mobile loading, theme integration, and AR compatibility with a safe storefront preset.

Read guide →

Unity

Optimize GLB for Unity glTFast

Match Draco and KTX2 output to the packages installed in every target build, then profile transfer and memory separately.

Read guide →

Unreal Engine

Optimize GLB for Unreal Engine

Reduce the interchange asset while keeping triangle, texture, and Draco decisions separate from Unreal runtime optimization.

Read guide →

Browse all optimization guides →

Changelog

Current local-tool updates, with former cloud features clearly marked as discontinued.

Aug 27, 2026
New

Large-file Draco compression

Large GLB and glTF files can now use Draco even when they contain oversized mesh primitives. OptimizeGLB prepares affected geometry in memory-safe chunks, keeps processing local, and supports side-by-side review before download.

Jun 13, 2026

OptimizeGLB is now 100% free and browser-only

All model compression now runs locally in your browser - no accounts, credits, or model-file uploads. Also new: .gltf input support, clearer error messages, proper output filenames (yourmodel-optimized.glb), and a built-in before/after comparison viewer.

See more changes

Open glTF resources

First-party specifications, tools, and sample assets for checking your output and target workflow.

Khronos glTF specificationglTF Transform documentationKhronos glTF ValidatorKhronos sample assets

FAQ

Some of our most frequently asked questions.

If your question is not listed here, select Need help? or email support@optimizeglb.com.

Need something custom?

Share a difficult asset, product issue, or custom optimization workflow with Antony.

Talk to Antony

Send a message for product support, bug reports, or custom project enquiries.

A practical local workflow for web 3D

Use it when you need hands-on control over model size without sending the asset to a compression service.

Local model processing

Model files stay on your device during compression.

Settings you can inspect

Adjust texture, mesh, and compatibility options for each workflow.

Batch and compare

Process a queue, inspect before and after, then download the files you want.

Free to use, runs locally in your browser. No account required.