U3D

File Format
Name	U3D
Ontology	Electronic File Formats 3D and CAD/CAM Models U3D
Extension(s)	.u3d
PRONOM	fmt/702
Wikidata ID	Q974182
Released	2005

U3D (Universal 3D) is a standardized format for storing compressed 3D graphical data. It was developed by a consortium of companies including Intel, Adobe, and Boeing, and issued as an ECMA standard (ECMA-363). It is supported for embedding in PDF files.

Identification

U3D files start with bytes 55 33 44, or "U3D" in ASCII.

Specs

• ECMA standards index
  • 1st edition of standard
  • 2nd edition of standard
  • 3rd edition of standard
  • 4th edition of standard

Sample files

• github.com/ClinicalGraphics/u3d sample files on GitHub.
• dexvert samples — image/universal3D

Links

• Wikipedia article
• Sourceforge page