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OBJ to GLB converter

Drop your .obj file — we convert it to .glb right in your browser. Files never leave your computer.

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Drop your OBJ file here
Accepts .obj · converts to .glb

OBJ vs GLB— what's the difference?

OBJ.obj

Human-readable Wavefront mesh format — ubiquitous in 3D graphics, game art, and asset pipelines. Pairs with a .mtl material file.

Strengths
  • Supported by virtually every 3D tool (Blender, Maya, 3ds Max, Unity, Unreal…)
  • Plain-text, easy to diff and hand-edit
  • Keeps UV coordinates and vertex normals, unlike STL
  • Material references via companion .mtl file
Limitations
  • Text format — larger on disk than binary meshes
  • No scene hierarchy, no animation, no skeletons
  • Materials live in a separate file; easy to lose
Typical use: 3D art pipelines, DCC handoff, asset archives
GLB.glb

Binary glTF — the JPEG of 3D. Self-contained, small, and loads natively on the web, in AR, and in every modern 3D engine.

Strengths
  • Everything (geometry, textures, materials, animations) packed into one file
  • Tiny and fast — designed for streaming and web delivery
  • Native support in Blender, Unity, Unreal, three.js, <model-viewer>, Android ARCore…
  • PBR materials (metallic-roughness) render consistently everywhere
Limitations
  • Binary — not hand-editable
  • Less common in traditional CAD pipelines
Typical use: Web 3D, AR/VR, real-time engines, e-commerce product views

How to convert OBJ to GLB

  1. 1
    Drop a .obj file on the page. If a .mtl companion exists, load both — the previewer reads them together.
  2. 2
    Preview the mesh in 3D. Use the Scene Tree on the left to walk the named groups.
  3. 3
    Click Download .GLB. The single binary is ready for three.js, <model-viewer>, Unity or AR.

FAQ

Do materials from the .mtl file carry over?

Diffuse colour and diffuse textures map to glTF's PBR base-colour. Specular / shininess from OBJ doesn't translate cleanly to metallic-roughness and is approximated. Review the result and tweak in Blender if the look matters.

Why is the GLB much smaller than the OBJ?

OBJ is text and re-lists every vertex per face. GLB is binary with indexed geometry — typically 3–10× smaller for the same model.

What about UVs and normals?

Both are preserved. If the OBJ has vertex normals they transfer; otherwise Three.js computes flat or smooth normals based on the OBJ groups.

Can the result be used for AR?

GLB works out of the box with Android Scene Viewer. For iOS AR Quick Look you specifically need USDZ — use the STEP-to-USDZ or the main 3D viewer's USDZ export.

Is my file uploaded anywhere?

No. Conversion happens entirely in your browser via Three.js' OBJ loader and GLTFExporter.

Related converters

OBJ → STLSTL → GLBSTEP → GLBFBX → GLB