Home : File Types : LCK File

.LCK File Extension

FREE DOWNLOAD Open over 300 file formats with File Viewer Plus.

File TypeProgram Lock File

3.4 (30 Votes) Thanks for voting!
Rare Uncommon Average Common Very Common
CategoryMisc Files


File format categories include Binary, Text, XML, and Zip. The format of this file type has not been determined.


Access control file used to "lock" a database or other file from being opened or changed by more than one user at a time; typically is open with the file is not in use and is locked when a user is working on the file; prevents accidentally overwriting changes and possible data corruption.

More Information

Some programs that use LCK files include Microsoft FrontPage, Corel Paradox, Autodesk Inventor, Pegasus Mail, and ACT! contact management software.

Since lock files are managed by their corresponding applications, they should not be opened manually.

Programs that open LCK files
Referenced by various applications
Updated 3/12/2008

FileInfo - The File Extensions Database

This page contains information about the .LCK extension and its known file associations. Our goal is to help you understand what an LCK file is and how to open it.

The Program Lock file type, file format description, and programs listed on this page have been individually researched and verified by the FileInfo team. We strive for 100% accuracy and therefore do not publish any information we have not verified.

If you would like to suggest any additions or updates to this page, please let us know!