STL OFF
Free online converter

Convert STL to OFF

Convert now
STL to OFF converterFREE
Drop a .STL file here
or pick one - we convert it to .OFF and give you the file to download

On this page

Tested on macOS, Windows & Linux
Last verified Oct 2026

More free converters

HEIC, PNG, WEBP, MP3 and more - every tool here is free.

Open the toolbox

How to convert STL to OFF

  1. Add your .STL file - drop it in the box above or click to browse.
  2. Convert it to .OFF in a few seconds.
  3. Download your new .OFF file.

What to expect

  • Surface triangle mesh transfers intact; there is no solid model, so features, history, or exact curves are not reconstructed.
  • Neither format stores units or scale, so the numeric coordinates are preserved but their real-world size remains undefined.
  • No color or material is added, since STL has none to carry over.

Frequently asked questions

Is any geometry lost converting STL to OFF?
No. Both STL and OFF store a triangle/polygon mesh of surface geometry only, so the same vertices and faces carry across. The shape is preserved; only the file encoding changes.
Why convert STL to OFF?
OFF is the common exchange format in computational geometry research and academic 3D shape datasets, where many tools (MeshLab, Blender) and algorithms expect it. Converting lets an STL model feed into those research pipelines.
Where does the resulting OFF file open?
Standard OFF is plain ASCII text, so it opens in MeshLab and Blender and imports cleanly into most computational-geometry toolkits. It is not a format that everyday 3D viewers or slicers read.
Does the OFF file keep color or units?
STL carries no color, units, or scale to begin with, so none of that is added. Standard OFF supports optional per-vertex color, but a plain STL has none to transfer, leaving a bare geometry mesh.
Learn about the formats: .STL · .OFF
Programs that convert STL: Autoconverter · IVCon · meshconv · Afanche 3D Viewer for Mac