has been removed from the Microsoft Download Center. While it was previously available under Knowledge Base article 273956 , that page now primarily serves as an archive. Microsoft Learn
Extract the file to a folder on your computer (e.g., C:\JetComp\ ).
Once downloaded, verify the file properties before running it: Right-click the file and select . Navigate to the Digital Signatures tab. jetcomp.exe download
Before relying heavily on this utility, understand its constraints:
During the compaction process, it identifies issues like missing indexes or invalid long value pointers and logs them in a special table called MSysCompactError . has been removed from the Microsoft Download Center
Jetcomp.exe is a standalone executable utility provided by Microsoft. It is designed to compact and repair databases created with the Microsoft Jet Database Engine (commonly used by Microsoft Access versions 97, 2000, 2002, 2003, and 2007). While modern versions of Access have a built-in "Compact and Repair" feature, Jetcomp is often more powerful. It can sometimes recover data from databases that are so severely corrupted that they cannot even be opened by the host application.
For developers, you can perform compaction programmatically using ADO (ActiveX Data Objects) and the JetEngine object's CompactDatabase method. This allows you to integrate database maintenance directly into your applications. This method requires MDAC 2.1 or later and is a more modern approach for programmatic control. Once downloaded, verify the file properties before running
Operate as a standalone utility without needing the full Access application installed (though it requires Jet engine components). How to Use It Is Jetcomp.exe retired for mdb? - Microsoft Q&A
Are you running a Windows operating system?
Troubleshooting Corrupt Access Databases: Is JetComp.exe Still Your Best Bet?
: Always verify the integrity of the file and scan for malware when downloading from non-Microsoft sources. Microsoft Learn Key Functions and Benefits Restoring Corrupt ACCESS Database - Spiceworks Community