GLB to USDZ Converter

Show GLB models in AR on iPhone and iPad: GLB to USDZ with materials and textures, at real size and sitting on the floor.

  • Files stay on your device
  • Free, no sign-up
  • Units and up axis handled
  • Batch and .zip

Drop a GLB file to convert

One file, many, or a .zip

In: STL · STEP · IGES · OBJ · 3MF · GLB · glTF · PLY · FBX · DAE · 3DS · AMF · VRML · ZIP

Converted on your device. Nothing is uploaded.

    How to convert GLB to USDZ

    1. Drop your GLB files

      Drop .glb files, including Draco, Meshopt and KTX2 compressed ones.

    2. Check the preview

      The model appears at the size and orientation it will have. Fix the file units, up axis or size under Size, units and orientation if needed.

    3. Choose USDZ options

      Written in metres, Y up, sitting on the floor and centered, which is what AR Quick Look expects.

    4. Convert and download

      One file downloads straight away. A batch gives a download per file and one .zip of all of them.

    What carries over from GLB to USDZ

    Worked out from what each format can store and what this converter writes. Nothing is changed silently: the preview shows the size and orientation before you download.

    Geometry Every triangle is kept at full precision.
    Color Kept: materials and textures, as PBR materials for AR Quick Look.
    Units Both are in metres, so sizes are unchanged.
    Orientation Both are Y up, so it stays the right way up.
    Objects Each part stays a separate object or mesh.
    Animation Dropped: the model is written in its rest pose.

    GLB to USDZ: what actually happens

    Android shows GLB in AR directly; iPhone and iPad want USDZ. The converter writes a USDZ in metres with each mesh's PBR material and textures, recentered so the model sits on the floor when AR Quick Look places it.

    Animations are not carried. Tap the .usdz on an iPhone, or link to it from a web page, to place the model in your room.

    GLB at a glance

    glTF 2.0 binary · .glb

    Stores
    Meshes, PBR materials, textures, animation and scenes in one binary file
    Color
    Full: textures, base colors and vertex colors
    Units
    Metres, fixed by the glTF spec
    Up axis
    Y, fixed by the spec
    File size
    Compact; Draco or Meshopt compression shrinks meshes 5 to 10 times
    Opens in
    Web viewers, Blender, Windows, Android Scene Viewer, Godot, Unity and Unreal importers

    glTF 2.0 is the Khronos Group's "JPEG of 3D", and GLB is its single-file binary form. It is what AI 3D generators, Sketchfab downloads and web apps hand out, and it is the only common format whose units (metres) and axes (Y up) are fixed by the spec.

    Open GLB files in the viewer

    USDZ at a glance

    Universal Scene Description, zipped · .usdz

    Stores
    A Pixar USD scene and its textures in an uncompressed zip
    Color
    PBR materials and textures
    Units
    Metres in this export
    Up axis
    Y
    Use
    AR Quick Look on iPhone, iPad, Mac and Vision Pro
    Opens in
    Safari and Files on Apple devices, Reality Composer, Blender, Omniverse

    USDZ packages Pixar's Universal Scene Description for Apple's AR Quick Look: tap a .usdz on an iPhone and the model appears in your room at real size.

    Tips for GLB to USDZ

    Real size

    AR shows the model at its size in metres; set a height if the GLB isn't built to scale.

    Web AR

    Serve the USDZ next to the GLB with <model-viewer ios-src> for one AR button on every phone.

    Textures

    Large textures are resized to 1024 px for Quick Look.

    GLB to USDZ FAQ

    How do I view a USDZ on iPhone?
    Open it from Files, Messages, Mail or a Safari link and tap the AR button.

    Are animations kept?
    No, the USDZ is static.

    Will it work on Vision Pro and Mac?
    Yes, USDZ opens in Quick Look on visionOS and macOS too.

    Is the converter free? Are there limits?
    Free, with no sign-up, watermark or file count limit. Batches and files of a few hundred MB work on most laptops; the only limit is your device's memory.

    Are my files uploaded?
    No. Files are read and written by JavaScript and WebAssembly in your browser and never sent to PrintPal. The STEP and IGES reader is the only extra download, once, from a public CDN.