.ODL File Extension

File Type 1

Object Description Language File

Developer Microsoft
Popularity
2.3  |  3 Votes
Category Developer Files
Format Text

What is an ODL file?

File written in the Object Description Language (ODL), a language used in the Windows software programming context; allows developers to make their ActiveX objects visible to other vendors by exposing and publishing properties of the objects.

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Programs that open ODL files

Updated December 5, 2012
File Type 2

OneDrive Event Log

Developer Microsoft
Popularity
2.0  |  1 Vote
Category Database Files
Format Binary

What is an ODL file?

An ODL file is an event log created by the Windows or Mac version of Microsoft OneDrive. It contains a list of events that occurred while a user was using OneDrive. OneDrive uses ODL files to record actions synced to the web version of OneDrive.

More Information

Microsoft OneDrive is a file hosting and sharing app used by individuals, organizations, and businesses to share documents, photos, and other files with each other. While users primarily access OneDrive online, they can also download desktop versions of OneDrive, which allow them to access and edit files offline.

Regularly, the desktop versions of OneDrive store a record of users' actions in ODL files. Microsoft can use these files to troubleshoot synchronization issues between the desktop and web versions of OneDrive.

Only a user's most recent OneDrive log is stored as an ODL file. When OneDrive creates a new ODL file, it compresses the previous ODL file and renames it to use the .ODLGZ extension.

ODL files are stored in the following locations by default:

  • Windows: C:/​Users/​[USER]/​AppData/​Local/​Microsoft/​OneDrive/​logs
  • Mac: ~/​Users/​[USER]/​Library/​Logs/​OneDrive

How to open an ODL file

While ODL files are not meant to be opened by users, you can view the contents of your ODL files using GitHub user ydkhatri's OneDrive Log ODL Reader (multiplatform).

Programs that open or reference ODL files

Updated August 5, 2022

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