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Local converter

GLTF to GLB Converter

Convert GLTF files to GLB locally in your browser for faster handoff across 3D tools.

Processed locally
No signup required
Files stay on your device
Browser-local GLTF to GLB conversion illustration

Private browser conversion

Files are converted locally in your browser.

1Upload2Convert3Download

Browser-local workflow

How this tool works

  1. Step 1

    GLTF

    Choose a GLTF file from this device.

  2. Step 2

    Browser-local conversion

    The supported geometry is converted in this browser.

  3. Step 3

    GLB

    Download the GLB result when conversion is complete.

Preserved

  • Geometry
  • Vertex colors
  • Scene hierarchy

Limited

  • Materials
  • Textures

Lost

  • Animation

Direct answer

What is preserved when converting GLTF to GLB?

This converter processes the GLTF file locally in your browser and downloads the converted GLB file. Geometry, vertex colors, and scene hierarchy are retained by the current loader and writer. Materials and textures use a supported subset. Animation is not included in the downloaded file.

Before you convert

GLTF to GLB compatibility

These results describe Modelfy's current browser loader and exporter, not every feature allowed by the file specifications.

Data preserved, limited, or lost when converting GLTF to GLB
DataResultWhat this implementation does
GeometryPreservedGeometry is retained by the current glTF loader and GLB writer.
MaterialsLimitedMaterials are normalized to Three.js standard materials; advanced shader properties can change.
TexturesLimitedOnly textures and buffers embedded in the single uploaded file are available; external files are blocked.
Vertex colorsPreservedVertex colors is retained by the current glTF loader and GLB writer.
AnimationNot exportedThe glTF format can contain this data, but the current single-file loader does not retain it for conversion.
Scene hierarchyPreservedScene hierarchy is retained by the current glTF loader and GLB writer.
Units and scalePreservedUnits and scale is retained by the current glTF loader and GLB writer.

Verify after export

  • Compare material colors and textures with the browser preview before using the result in production.
  • Confirm that a static model is acceptable; animation is not exported.

Why choose this GLTF to GLB converter

Local GLTF decoding

The selected GLTF model file is decoded and rewritten as GLB on your device; the model file is not uploaded to Modelfy.

GLTF to GLB data report

The compatibility table identifies geometry, vertex colors, scene hierarchy as preserved by this loader and writer.

GLB output checks

Materials is limited; review the implementation detail and verify the downloaded file in your destination tool.

Preview before export

Inspect the browser preview before converting, then use the post-export checklist to confirm the GLB result.

How to convert GLTF to GLB online

  1. 01

    Upload your GLTF file

    Drag and drop the file into the converter, or click Upload. GLTF inputs up to 10 MB are processed locally.

  2. 02

    Convert to GLB

    Preview the model in 3D, then click Convert. The conversion runs locally in the browser; processing time depends on model complexity and device resources.

  3. 03

    Download the GLB file

    Your GLB file downloads straight to your device, ready for the next tool in your pipeline.

About the GLTF file format

GL Transmission Format

glTF 2.0 is a royalty-free specification from the Khronos Group for efficient transmission of 3D scenes. The .gltf variant stores the scene description as readable JSON, optionally referencing external binary buffers and textures.

It is the most widely supported runtime format on the web: three.js, Babylon.js, Unity, Unreal, and most DCC tools read and write glTF directly.

Format reference: Khronos glTF 2.0 specification

Strengths

  • Open standard with wide industry support
  • Human-readable JSON scene description
  • PBR materials, skins, and animations

Commonly used for

  • Web 3D and e-commerce viewers
  • Cross-tool scene exchange
  • Runtime asset delivery

About the GLB file format

GL Transmission Format Binary

GLB is the binary container for glTF 2.0, the "JPEG of 3D" standard maintained by the Khronos Group. A single .glb file bundles meshes, PBR materials, textures, and animations, which makes it the easiest 3D format to move between tools and platforms.

Because GLB is optimized for fast loading on the web, it is the default output of most modern 3D pipelines, including AI 3D generators, web viewers, and game engines.

Format reference: Khronos glTF 2.0 specification

Strengths

  • Single self-contained file with textures included
  • Full PBR material and animation support
  • Loads fast in browsers and game engines

Commonly used for

  • Web and AR/VR experiences
  • Game engine asset delivery
  • AI-generated 3D model exchange

Frequently asked questions

Is my GLTF model file uploaded to a server?

The selected GLTF model file is processed by the browser and is not uploaded to Modelfy. Website code and static assets still load over the network like a normal web page.

Will I lose quality converting GLTF to GLB?

Mesh geometry is preserved as closely as the GLB format allows. The target format may triangulate geometry or drop unsupported features such as animations, materials, textures, or scene hierarchy.

Is the GLTF to GLB converter free to use?

Yes. The browser viewer, converter, and local 3D text tool require no account and add no watermark. Input limits vary by format, up to 50 MB; AI model generation is a separate credit-based product.

What is the maximum file size?

GLTF inputs up to 10 MB are accepted. The format-specific limit keeps browser-local parsing bounded; actual processing also depends on available memory, model complexity, and device performance.

Does the browser tool support .gltf files with external buffers?

Self-contained .gltf files (embedded buffers and textures) work best, because the browser only receives the single file you upload. If your .gltf references external .bin or texture files, export it as .glb first.

What is the difference between GLB and glTF?

They share the same data model. A .gltf file is JSON that can reference external texture and buffer files, while a .glb packs everything into one binary file. GLB is easier to share; glTF is easier to inspect and edit by hand.

Related converters

Convert GLTF to more formats

Convert other files to GLB

AI 3D generation

From a single image to a production-ready 3D model

These browser tools stay free for viewing and converting files you already have. When the model does not exist yet, Modelfy generates a textured mesh from one reference image — the first one is free.

Try the AI 3D generator