OBJ to OFF Converter
Convert a Wavefront OBJ 3D model to OFF (Object File Format) for research, MeshLab and CGAL.
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About Converting OBJ to OFF
OBJ is a widely supported 3D geometry format that stores vertices, faces, texture coordinates and normals as plain text. It is a common interchange format between modelling, rendering and CAD applications, optionally pairing with an .mtl file for materials. When you need to move away from OBJ, the usual reason is simple: materials live in a separate .mtl file.
Converting your OBJ 3D model to OFF solves that. OFF (Object File Format) is a simple, plain-text mesh format that lists a model’s vertices and faces. It is widely used in academia, geometry-processing research and tools such as MeshLab and CGAL, where a minimal, easy-to-parse mesh format is preferred. In practice you gain human-readable plain text and trivial to parse and generate. PrivConvert runs the whole OBJ-to-OFF conversion in server memory and deletes your file the instant the OFF is ready — nothing is stored, logged or reused.
When this conversion helps
- You need human-readable plain text
- You need trivial to parse and generate
- You need standard in research and geometry-processing tools
- Sharing a OBJ 3D model with someone whose software expects OFF
Tips for best results
- Files up to 250 MB are supported, and you can batch-convert several OBJ files at once; each is processed privately and deleted immediately.
How to Convert OBJ to OFF Online
You can convert OBJ to OFF right in your browser in under a minute. What you gain with OFF: human-readable plain text.
Drag and drop your file into the upload area, click to browse your device, or paste a URL to a file hosted online. You can upload files up to 250 MB and batch convert up to 20 files at once.
Once uploaded, the conversion from OBJ to OFF starts automatically. The process runs entirely in an isolated environment - your data never leaves the secure pipeline.
Your converted file is ready instantly. Click the download button to save it to your device. The file is deleted from memory immediately after download.
Why choose PrivConvert?
Converting OBJ to OFF should not mean handing a stranger a permanent copy of your data. PrivConvert processes everything in memory and forgets it instantly.
Files are processed in volatile memory (RAM) and purged the instant your download is ready — nothing is ever written to disk, cached or backed up.
Every upload and download is protected with TLS 1.3, so your 3D model cannot be intercepted on the way to the server or back to you.
Convert instantly with no sign-up, no email and no profiling cookies. We never build a profile around you or the files you convert.
Runs in any modern browser on Windows, macOS, Linux, Android and iOS — no install, plugin or desktop software needed.
OBJ vs OFF - Format Comparison
| Feature | OBJ | OFF |
|---|---|---|
| File extension | .obj | .off |
| Full name | Wavefront OBJ | Object File Format |
| Introduced | 1990 | 1990s |
| Encoding | Text | Text |
| Editable | No | No |
| Open standard | Yes | Yes |
| Supported by PrivConvert | Yes (as input) | Yes (as output) |
| Privacy-safe conversion | In-memory, zero storage | |
| Max file size | 250 MB per file | |
| Batch support | Up to 20 files simultaneously | |
A converter you do not have to worry about
PrivConvert handles thousands of conversions every day for developers, designers and privacy-conscious people who need a 3D model converted without handing over a permanent copy.