OBJ to USDZ Converter

Put textured OBJ models into AR on iPhone and iPad: OBJ to USDZ with the .mtl materials and textures packed in.

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

Drop an OBJ 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 OBJ to USDZ

    1. Drop your OBJ files

      Drop the .obj with its .mtl and texture images, or a .zip of the folder.

    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 OBJ 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 face is kept; quads and n-gons are split into triangles.
    Color Kept: materials and textures, as PBR materials for AR Quick Look.
    Units OBJ has bare numbers, so they pass through as metres: 1 unit becomes 1 metre. If the preview size is wrong, set the file units.
    Orientation Both are Y up, so it stays the right way up.
    Objects Each part stays a separate object or mesh.

    OBJ to USDZ: what actually happens

    Drop the .obj with its .mtl and textures, or a .zip. The converter writes a USDZ with every material and texture, recentered to sit on the floor in AR Quick Look.

    OBJ has no units, so its numbers pass through as metres. A model made in millimetres for printing should have its file units set to millimetres first, or it will appear a thousand times too big.

    OBJ at a glance

    Wavefront OBJ · .obj

    Stores
    Vertices, faces (triangles, quads, n-gons), UVs and normals as text
    Color
    Materials and textures in a separate .mtl file; vertex colors as an unofficial extension
    Units
    None, the numbers are bare
    Up axis
    Y by convention (Blender, Maya, most 3D apps)
    File size
    Text: about a binary STL's size for bare geometry, up to twice that with UVs and normals
    Opens in
    Blender, Maya, 3ds Max, ZBrush, Cinema 4D, game engines, most slicers

    OBJ came out of Wavefront Technologies' animation software and became the plain-text lingua franca of 3D. The geometry is in the .obj; colors and texture references live in a companion .mtl file, which is why OBJs so often arrive grey.

    Open OBJ 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 OBJ to USDZ

    Check the size

    The preview shows the size the USDZ will have.

    Textures

    Missing textures show as grey in the preview; add the files.

    Android

    Use OBJ to GLB for Android.

    OBJ to USDZ FAQ

    Does OBJ to USDZ keep textures?
    Yes, with the .mtl and images dropped alongside.

    Why is the AR model huge?
    The OBJ was in millimetres. Set the file units to millimetres and convert again.

    Does it need Reality Converter?
    No, it runs in your browser on any computer.

    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.