Microsoft Windows Live Sync library file
File type: Various data file
The .windowslivesynclibrary file extension identifies a library file used by Microsoft Windows Live Sync.
The file contains information needed by the synchronization software to manage its library and synchronized content.
File type category:
Various data file
Date updated: October 3, 2026
Record marked as obsolete and not updated for a long time.
Microsoft Windows Live Sync was a Microsoft service and client for synchronizing and sharing files between computers. It was also known as Microsoft Mesh or Windows Live Mesh.
A .windowslivesynclibrary file is a proprietary data file used by the client to store library-related information, rather than a document intended for direct use. It works together with the files and folders managed by Windows Live Sync.
Windows Live Sync was available for supported desktop operating systems, including Windows. The service and its client are obsolete and were replaced by OneDrive.
This file is intended to be read by the original Microsoft Windows Live Sync software, not opened as a normal document. Windows Live Sync is obsolete and is no longer generally available, so modern applications may not be able to open it. Do not edit the file manually; use the synchronized files themselves instead.
The library file is not intended to be converted into a standalone document.
If the goal is to retain the synchronized data, copy or export the actual files from the associated folders and use a current synchronization or storage service. Keep the library file only if an old Windows Live Sync installation still needs it.
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