.INLK File Extension
File TypeAdobe InDesign Lock File
File format categories include Binary, Text, XML, and Zip. The format of this file type has not been determined.
What is an INLK file?
Document lock file created by Adobe InDesign, a professional page layout program; created when an InDesign document (.INDD file) is opened so that other instances of InDesign show warnings when trying to open or edit the document.
INLK files help prevent multiple users from editing the same file at the same time.