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GLBKit

OFF to GLB Converter

Convert a bare OFF geometry file to a self-contained GLB with computed normals and a default material. Runs in your browser.

Drag & drop your OFF file here

or click to browse

Supported Formats

.glb.gltf.obj.fbx.stl.ply.3mf.off.zip

Format Information

Source Format

OFF.off

OFF (Object File Format)

OFF is a minimal, human-readable geometry format from the Geomview project: a header line, a count line, then a list of vertex positions and a list of polygon vertex lists. There is deliberately nothing else in the specification.

What it carries: Vertex positions and face index lists, written out as triangles. No normals, no colours, no UVs, no materials, no textures and no animation.

Open a OFF file in the viewer

Target Format

GLB.glb

GLB (glTF Binary)

GLB is the binary packaging of glTF 2.0. Meshes, materials, image textures, animation and the node hierarchy are all written into one file, so an asset can be dropped into an engine or a web page without shipping a folder of sidecar files.

What it carries: Vertex positions, normals, UVs and vertex colours, full PBR materials (base colour, metallic/roughness, normal, occlusion, emissive), embedded image textures, node hierarchy, skinning, morph targets, keyframe animation, cameras and lights.

Open a GLB file in the viewer

About this conversion

A bare geometry file becomes a full scene asset. The OFF vertex and face lists are read and written as a self-contained GLB with computed normals, ready for a browser, an engine or a viewer.

Why convert OFF to GLB

  • Open a Geomview-style OFF file in a proper 3D viewer.
  • Load minimal geometry into a web scene, a game engine or an AR experience.
  • Turn a shape-only file into a modern interchange format you can extend later.

What happens during the conversion

Geometry

The vertex positions and face list are written into a single GLB mesh. Normals are computed from the triangles, and any polygon face with more than three corners becomes triangles, because OFF output is triangle-based.

Materials and textures

OFF has no material, colour, UV or normal fields, so none of that data exists to carry across. The GLB is given the fixed material the OFF reader attaches on load — a lime green (#B8FF3B) standard material — plus normals computed from the triangles.

Common use cases

  • Viewing a minimal geometry file in a modern 3D viewer.
  • Feeding a shape-only asset into a web or real-time project.
  • Producing a self-contained file from a bare vertex/face list.

Limitations of this conversion

  • The source has no materials, colours or UVs, so the result is a default-material shape.
  • Everything becomes one mesh; OFF has no object structure to preserve.
  • Normals in the GLB are computed from the triangles, since the source does not store them.

How to convert OFF to GLB

Three steps in the browser. Nothing is uploaded to a server, so an unwieldy file is limited only by your own device's memory.

1
STEP 1

Upload your .off

The plain-text OFF file is read directly, and vertex normals are derived from the face winding before the .glb is assembled.

2
STEP 2

Convert to GLB

Vertices and faces are written into one binary glTF with computed normals.

3
STEP 3

Open it in the GLB viewer

Confirm the shape; appearance will be a flat default material.

Related tools and formats

Frequently Asked Questions

Questions people ask when turning OFF files into GLB.

Looking for a different direction? See every supported conversion.