Convert OBJ Meshes to the Minimal OFF Research Format
Convert Wavefront OBJ files to OFF (Object File Format) and make your geometry accessible in MeshLab, CGAL, OpenMesh, and any computational geometry or academic research tool that reads the simple ASCII OFF structure.
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Convert OBJ to OFF
Upload a OBJ file and download the converted OFF — all processing happens on the server.
Drop your OBJ file here
or click to browse
Accepts .obj files
From Universal DCC Mesh to Research Format
OBJ is the most portable DCC format, but its companion MTL files, UV sets, and group syntax add complexity that computational geometry tools often do not need. OFF is the opposite — a single ASCII file with just vertex coordinates and face indices. Converting OBJ to OFF gives research tools a clean, dependency-free geometry input.
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No Dependencies, Just Geometry
OBJ files reference external MTL material files and texture images. OFF carries everything in one self-contained ASCII file — no companion assets, no texture lookups, no material parsing. The converted OFF is a single portable file that any OFF-reading tool can load without dependency resolution.
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CGAL, OpenMesh, and Algorithm Ready
CGAL and OpenMesh both read OFF natively as a primary mesh input format. Converting OBJ to OFF lets you feed Wavefront assets directly into computational geometry algorithms — mesh processing, Delaunay triangulation, surface remeshing, and curvature analysis — without format conversion in code.
Convert NowHow to Convert OBJ to OFF
Upload Your OBJ File
Drag and drop an OBJ file into the upload zone or click to browse. Files up to 100 MB are supported.
Sign In and Convert
Sign in to start the conversion. The server parses the OBJ geometry and writes a clean ASCII OFF file with vertex coordinate and face index lists.
Download the OFF
Once ready, click Download. The self-contained OFF file is immediately usable in MeshLab, CGAL, OpenMesh, and any computational geometry or research tool that reads the format.
Deep Dive
OBJ and OFF: Universal DCC Mesh vs. Minimal Research Format
Why Use It
No Software to Install
The conversion runs on the server. No MeshLab batch scripts, no local Assimp CLI pipelines, no Python geometry libraries needed. Upload and download directly from your browser.
Single Self-Contained File
Unlike OBJ which requires a companion MTL file and texture images, OFF packs geometry into one self-contained ASCII file with no external dependencies to manage.
Research Tool Compatible
MeshLab, CGAL, OpenMesh, and most computational geometry libraries read OFF natively. The converted file plugs directly into mesh analysis, simplification, and academic workflows.
DCC to Algorithm Pipeline
OBJ is the DCC portability standard. OFF is the research community's minimal mesh input. Converting OBJ to OFF bridges artist assets into computational geometry algorithm development and academic research.
Who Uses It
Who Converts OBJ to OFF
Frequently Asked Questions
What is the OFF file format?
OFF (Object File Format) is a simple ASCII format for representing polygonal meshes. It lists vertex coordinates followed by face definitions, with optional per-vertex color columns. It is widely used in computational geometry research and tools like MeshLab, CGAL, and OpenMesh.
Does the OFF output include materials or UV maps from the OBJ?
No. OFF stores only geometry — vertex positions, face indices, and optional vertex colors. MTL material definitions, UV texture coordinates, and texture images from the OBJ are not representable in OFF. If you need materials, convert to GLTF or GLB instead.
Are vertex normals from the OBJ preserved in the OFF output?
Standard OFF does not include a vertex normal field. The converter outputs vertex positions and face indices. If you need normals preserved, PLY is a better target format as it supports per-vertex normal properties.
Is vertex color data included in the OFF output?
If the OBJ file carries per-vertex color data (uncommon in standard OBJ), the converter writes them as per-vertex RGBA color columns in the OFF output. Standard OBJ files without vertex colors produce a basic OFF with position and face data only.
What is the maximum OBJ file size?
The converter supports OBJ files up to 100 MB. Dense meshes produce large OFF outputs since ASCII encoding is less compact than binary formats like PLY binary or GLB.
Convert Your OBJ File to OFF Now
Upload your OBJ mesh and get a clean, self-contained OFF in seconds. No install, no manual steps.