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, popularised by the Geometry Center’s Geomview viewer in 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, and any pictures a 3MF package carries - its own thumbnail, the build-plate renders slicers such as Bambu Studio and OrcaSlicer write, and texture maps - are extracted and shown with it. 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.