Free online GLTF to USDZ converter

1. Source format: glTF

glTF (GL Transmission Format) is a modern 3D asset format designed for efficient transmission and loading of models, materials, textures, and animations. It is widely used in web 3D, game development, AR/VR pipelines, and real-time visualization because it is compact and fast to parse. glTF files may appear as .gltf (JSON with external resources) or .glb (binary package).

Typical glTF use cases include product viewers, interactive web scenes, mobile AR content, and exchanging 3D assets between tools such as Blender, Maya, and game engines.

2. Target format: USDZ

USDZ is a packaged Universal Scene Description archive used primarily by Apple ecosystems for AR Quick Look, iPhone/iPad augmented reality previews, and 3D content distribution. It bundles scene data and assets into a single file that can be opened directly on supported Apple devices.

Its main advantages are easy sharing, native Apple AR support, and a self-contained package that avoids separate texture files. USDZ is especially common for e-commerce previews, AR product demos, and Apple-focused workflows.

3. How to perform the conversion

The most practical way to convert glTF to USDZ is to use a 3D application that supports both formats, such as Blender, or to use the built-in converter on 101convert.com for a quick online conversion without installing software.

Using Blender:

1. Open Blender and import the glTF model with File → Import → glTF 2.0.
2. Check the model scale, orientation, materials, and textures. USDZ is often used for AR, so correct real-world scale matters.
3. Export the scene with File → Export → Universal Scene Description or a USD/USDZ export add-on if available in your Blender version.
4. Choose .usdz as the output if the exporter supports direct USDZ packaging; otherwise export .usd and package it into USDZ with a compatible USD toolchain.
5. Verify the result on an Apple device using Quick Look or another USD-compatible viewer.

Using 101convert.com:

1. Upload your .gltf or .glb file to the converter on the website.
2. Select USDZ as the output format.
3. Start the conversion and download the generated .usdz file when it is ready.

If your glTF model uses external textures or buffers, make sure all referenced files are available before converting. A single-file .glb is often easier to convert because it already contains the geometry and resources in one package.

4. Notes on quality, compatibility, or limitations

Not every glTF feature maps perfectly to USDZ. Complex shaders, custom extensions, advanced animation setups, and some PBR material details may be simplified or altered during conversion. This is especially important when converting models intended for high-fidelity rendering.

Texture handling can also affect results. USDZ works best with standard image formats and relatively simple material setups. Large textures may increase file size, and unsupported texture compression or shader nodes may need to be baked or flattened first.

For best results, use a clean glTF asset with standard materials, correct UVs, and a sensible scale. If the model is meant for AR on Apple devices, test the final .usdz file on the target device to confirm orientation, scale, and appearance.