GLB to OBJ Converter

Get a GLB into tools that only read OBJ: meshes as separate objects, materials in an .mtl, and textures as PNG files, all in one .zip.

  • 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 OBJ

    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 OBJ options

      Keep materials on to get a .zip with the .obj, its .mtl and textures. Pick the up axis: Y for Blender and game engines, Z for slicers and CAD.

    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 OBJ

    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: material colors and textures go in a .mtl with PNG textures (you get a .zip); vertex colors are written into the OBJ.
    Units OBJ stores no units. The numbers stay in the unit the GLB was read in (metres); you can change that in the options.
    Orientation Kept the way the GLB had it. Switch to Y up (Blender, game engines) or Z up (slicers, CAD) in the options.
    Objects Each part stays a separate object or mesh.
    Animation Dropped: the model is written in its rest pose.

    GLB to OBJ: what actually happens

    Some modelling, sculpting and slicing tools still don't read glTF. GLB to OBJ unpacks the model into the classic trio: the .obj with every mesh as its own object, a .mtl with each material's color, and the textures saved as PNG. The UVs are flipped to OBJ's convention, so the textures line up.

    The OBJ keeps glTF's numbers (metres) and its Y up, which is what Blender, Maya and ZBrush expect. Going to a slicer instead? Pick Z up and set the output to millimetres, or use GLB to STL.

    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

    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

    Tips for GLB to OBJ

    Keep the folder together

    Unzip the .obj, .mtl and textures into one folder; the .mtl finds textures by file name.

    PBR is simplified

    OBJ materials are basic: base color and texture come across; roughness, metalness and normal maps don't.

    Compressed GLB

    Draco and Meshopt GLBs are decompressed for you.

    GLB to OBJ FAQ

    Does GLB to OBJ keep textures?
    Yes. The base color textures are saved as PNG next to the .obj and referenced from the .mtl.

    Why is the download a .zip?
    An OBJ with materials is several files: the .obj, the .mtl and the textures. The .zip keeps them together.

    Can I get just the .obj?
    Yes. Untick materials in the OBJ options for a single geometry-only .obj.

    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.