Tutorials & guides
Everything you need to know about Rhino file versions and compatibility.
How to Open Rhino 8 Files in Rhino 7
Rhino 7 can't read Rhino 8 .3dm files directly. Here are three reliable ways to open them, including a free online converter.
How to Downgrade Rhino Files (Any Version)
A step-by-step guide to converting Rhino .3dm files to older versions — Rhino 8, 7, 6, 5 and earlier.
How to Convert Between Rhino Versions
Everything you need to know about converting .3dm files between Rhino versions, up and down.
Rhino File Compatibility Guide
Which Rhino versions can open which .3dm files? The complete compatibility matrix, explained.
Rhino Won't Open a .3dm File — How to Fix It
The most common reasons Rhino refuses to open a .3dm file, and how to recover the geometry in minutes.
The Rhino .3dm File Format Explained
What's inside a .3dm file, how OpenNURBS versions work, and why downgrading is a lossy operation for some features.
How to Share Rhino Files With Clients on Older Versions
A practical workflow for architects and designers who work in Rhino 8 but ship files to clients on Rhino 6 or 7.