What is a .OFF file?
OFF (Object File Format) is a simple 3D mesh format storing polygons.
- Did you know
- OFF is a long-standing teaching and research mesh format from the early 1990s.
- OFF stands for Object File Format and was developed for Geomview, the 3D viewer from the Geometry Center at the University of Minnesota.
- An OFF file starts with the keyword “OFF” followed by counts of vertices, faces and edges, then lists the coordinates and faces.
- It is a plain, text-based mesh format favoured in teaching and research for its clarity and platform independence.
- Many models in the Princeton Shape Benchmark are distributed as OFF files, a staple of geometry research.
- What Analyser shows you
- View STL, OBJ, PLY, OFF, STEP, IGES, BREP, 3MF, AMF and glTF/GLB models in an interactive WebGL viewer with orbit, orthographic or perspective projection, a wireframe topology overlay, an orientation cube, triangle count, bounding box, surface area and volume. glTF 2.0 and binary GLB scenes are parsed natively - the node graph is flattened, mesh geometry shown, and the authoring tool, version and mesh/material/animation counts read. STEP/IGES/BREP are tessellated with OpenCASCADE and STEP shows its originating CAD system, version and AP203/214/242 protocol; 3MF and AMF let you inspect each model and assembly on the build plate individually. Wavefront material libraries (MTL) are broken out into each material with its colours, shininess, opacity and the texture files it references.
- Open a .OFF file
- Drag a .OFF file onto the Analyser home page (or tap to pick one). It opens entirely in your browser - nothing is uploaded, there is no account, and it works offline once installed.