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glTF™ (GL Transmission Format) is a royalty-free specification for the efficient transmission and loading of 3D scenes and models by engines and applications. glTF minimizes the size of 3D assets, and the runtime processing needed to unpack and use them. glTF defines an extensible, publishing format that streamlines authoring workflows and interactive services by enabling the interoperable use of 3D content across the industry.

glTF - Helping to Make 3D Pervasive!

glTF is constantly evolving to bring new capabilities and improvements to the API. Here are some of the most significant developments.

Jul 2021

New glTF Extensions Raise the Bar on 3D Asset Visual Realism

glTF can now represent material properties such as refraction, color attenuation, and volumetric properties.


Apr 2021

Use glTF with KTX 2.0 to Further Optimize Asset Size

Universal distribution of supercompressed GPU textures; open source KTX 2.0 tools and guides released.


Dec 2020

Wave of New glTF PBR 3D Material Capabilities

New Physically Based Rendering extensions for Clear Coat, Transmission and Sheen continue to build a powerful, interoperable, material model for the glTF ecosystem.


Jun 2017

Khronos Releases glTF 2.0 Specification

Runtime 3D Asset Delivery Format Enhanced with Platform Independent Physically Based Rendering.


Join the glTF Community

The 3D Formats Working Group welcomes feedback from implementers, engine developers, content creators, and artists to influence glTF’s evolution, and there are several ways to follow the latest glTF developments, get questions answered and make suggestions for improvement.

Any company that wishes to participate directly in the 3D Formats Working Group, which is responsible for the glTF, KTX and COLLADA specifications, can join the Khronos Group for access to all its standardization activities. The 3D Formats group works closely with the 3D Commerce Working Group which brings together industry-leading e-commerce companies to enable the seamless design, manufacture, and presentation of 3D products across diverse consumer platforms to reach millions of end-users.

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Sign up to receive email updates on the latest WebGL events, news, spec announcements and more.


glTF Demo

This is a live demo of Damaged Helmet , by Leonardo Carrion using <model-viewer> . Use your mouse or trackpad to move the view or zoom in or out. This model was originally published under a CC BY-NC 2.0 license.

glTF is the "JPEG of 3D"

glTF is the JPEG of 3D


glTF 2.0 Scene Description Structure

glTF Ecosystem

glTF 3D Asset Formats Ecosystem

Industry Support for glTF

Publicly stated support for glTF

Join the Slack group Join the forums

glTF™ (GL Transmission Format) is a royalty-free specification for the efficient transmission and loading of 3D scenes and models by applications. glTF minimizes both the size of 3D assets, and the runtime processing needed to unpack and use those assets. glTF defines an extensible, common publishing format for 3D content tools and services that streamlines authoring workflows and enables interoperable use of content across the industry.


Please provide spec feedback by submitting issues. For technical or art workflow questions, or to showcase your work, join the glTF forum. For quick questions, use the #gltf channel in the Khronos Group Slack.



From | PDF | hardcopy | Khronos reference cards
Japanese translation by Takuto Takahashi

For developers

For artists

Preview tools


glTF Tools

Tools, applications and libraries for working with glTF can be found in the glTF Project Explorer.


  • glTF-Generator-Registry - An open registry of tools that create glTF assets, along with structured metadata such as links to documentation and bug trackers.

Formats Built on glTF

  • 3D Tiles - An open standard for streaming and rendering massive heterogenous 3D content.
  • VRM - A 3D avatar format for VR applications.

Stack Overflow

Presentations and Articles



All Presentations and Articles

We believe the true usefulness of glTF goes beyond the spec itself; it is an ecosystem of tools, documentation, and extensions contributed by the community. You are encouraged to get involved!