Convert GLTF to GLB Online — Free
Upload a GL Transmission Format file and download it as GL Binary. Runs entirely in your browser — no server uploads.
About These Formats
GL Transmission Format
GLTF is the Khronos open standard for 3D assets — a JSON-based format that describes scenes, meshes, materials, animations, and cameras with external texture files.
Used with
WebGL applications, game engines, AR/VR platforms, and cross-tool 3D workflows.
GL Binary
GLB is the binary form of the GLTF format — a compact, web-optimized container that bundles geometry, textures, and animations into a single file.
Used with
Three.js, Babylon.js, React Three Fiber, Unity, Unreal Engine, Blender, AR/VR applications.
What Transfers from GLTF to GLB
A breakdown of which data survives the GLTF-to-GLB conversion.
3D Geometry
Vertices, faces, and normals always transfer
Textures & Materials
Albedo, roughness, metallic, and normal maps all transfer
Animations
Skeletal animations and morph targets transfer
Vertex Colors
Per-vertex color data transfers
Multiple Objects
Scene hierarchy and multiple objects transfer
When to Convert GLTF to GLB
Convert GLTF to GLB when you need a web-ready, self-contained 3D asset. GLB is the preferred format for Three.js, React Three Fiber, Babylon.js, and Needle Engine. It bundles geometry, textures, and animations into a single binary file, making it ideal for fast web loading and AR/VR applications.
GLTF to GLB — What to Know Before Converting
The GLB output bundles all geometry, materials, and textures into a single self-contained binary — no companion files needed. Binary encoding typically reduces file size by 20–40% compared to text-based source formats. The file loads directly in Three.js, Babylon.js, React Three Fiber, Unity (GLTF importer), and Unreal Engine's built-in GLTF pipeline.
Other GLTF Conversions
Tips for the Best GLTF to GLB Result
Set the model origin to the centre of mass before exporting from your DCC tool. A misplaced pivot causes models to appear offset or rotate incorrectly in Three.js and AR viewers.
Apply all transforms (scale, rotation, location) before export — un-applied transforms produce unexpected scaling when the GLB is loaded in another application.
Keep combined texture size under 4 MB for smooth web delivery. Use the Texture Resizer tool to downscale large maps if needed.
In Unity, install the "GLTF Fast" or "UnityGLTF" package — Unity's default model importer does not support GLB natively.
Validate the GLB at gltf.report or the Khronos GLTF Viewer before deploying to catch material or mesh issues early.
Common Reasons to Convert GLTF to GLB
- →Web 3D: loading assets in Three.js, Babylon.js, React Three Fiber, or any WebGL / WebGPU renderer
- →E-commerce: embedding interactive 3D product viewers on Shopify, WooCommerce, or custom storefronts using <model-viewer>
- →Game engines: importing into Unity (GLTF importer package) or Unreal Engine's built-in GLTF pipeline with PBR materials intact
- →AR / VR: GLB is the standard asset format for WebXR experiences, iOS AR Quick Look, and Meta Quest browser apps
- →AI 3D generation: SphereLinks exports all AI-generated models as GLB with full PBR textures — ready to drop into your project immediately
Frequently Asked Questions
How do I convert GLTF to GLB?
Upload your .gltf file using the tool above, confirm the source format is set to GLTF and the target is GLB, then click Convert. The file processes in your browser and you can download it immediately.
Does converting GLTF to GLB preserve textures?
Yes. Converting to GLB preserves PBR materials and embedded textures from the source file.
Is this converter free?
Yes, completely free. No account, no usage limits, no hidden fees.
Are my files uploaded to a server?
No. All processing happens locally in your browser using WebGL. Your files never leave your device.