What is the name of the Pro Tools session file extension?

The Pro Tools session file extension is .ptx. This file extension is associated with Pro Tools sessions that are created in versions 9 and later, signifying that the session can contain advanced features such as track freeze, consolidated audio clips, and other improvements that were introduced in these versions.

For users who need to share their sessions or open them in different versions of Pro Tools, understanding the .ptx file format is crucial, particularly since it supports the collaboration features that modern productions may require. Using session files with the .pt extension, which were common in earlier Pro Tools versions, lacks some of these advanced capabilities. The .pro and .ptf extensions are not used for Pro Tools sessions, further confirming that .ptx is indeed the correct and current file extension for Pro Tools session files.