Creo Elements/Pro versioned data
File type: Various data file
A 66 file contains versioned data associated with Creo Elements/Pro, formerly known as Pro/ENGINEER.
It is a proprietary data file used by the CAD/CAM software on Microsoft Windows.
File type category:
Various data file
Date updated: October 9, 2026
Creo Elements/Pro, formerly known as Pro/ENGINEER, is a computer-aided design and manufacturing application developed by PTC for Microsoft Windows.
The 66 file contains versioned data created by the software.
Compatible Creo Elements/Pro or Pro/ENGINEER installations may require the related data and an appropriate software version to use it.
Use a compatible version of Creo Elements/Pro or Pro/ENGINEER on Microsoft Windows to access the versioned data. Because it is software-specific data, the file may need to be handled as part of related Creo data rather than opened independently.
The 66 file is not normally converted independently because it contains software-specific versioned data. Open the associated data in a compatible Creo Elements/Pro or Pro/ENGINEER installation instead.
When supported by the software, save or export the resulting design using one of the application's available formats.
Software apps that create 66 files:
Microsoft Windows
Software applications that handle other tasks involving 66 files:
Microsoft Windows
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