Download Microsoft Jet Oledb 4.0 May 2026

Before doing anything, verify the driver exists on your system.

Provider=Microsoft.Jet.OLEDB.4.0;Data Source=C:\path\to\database.mdb;Jet OLEDB:Database Password=MyPassword;

Microsoft replaced Jet 4.0 with the Microsoft Access Database Engine. This allows you to interact with Access databases (and Excel files) using modern systems.

Most users today are on Windows 10 or 11. If you need to interact with .mdb files on a modern system, you should not try to hunt down the old Jet files. Instead, use the official replacement provided by Microsoft: the Microsoft Access Database Engine. download microsoft jet oledb 4.0

Jet 4.0 is not installed by default. However, Microsoft released a different package that often works as a drop-in replacement: Microsoft Access Database Engine 2010 Redistributable.

Wait, isn't that for Access 2010? Yes. But it includes the ACE OLEDB provider, which is backwards compatible with Jet 4.0 for most read/write operations. Before doing anything, verify the driver exists on

How to get it:

Then use this connection string (ACE instead of Jet): Microsoft replaced Jet 4

Provider=Microsoft.ACE.OLEDB.12.0;Data Source=C:\myDatabase.mdb;

Note: This works for 95% of legacy apps. However, some very old Jet-specific features (like Replication or User-Level Security with older formats) may not work perfectly.

If you have landed on this page searching for the phrase "download Microsoft Jet OLEDB 4.0," you are likely a developer, a database administrator, or an IT professional trying to connect an application to a legacy Microsoft Access database (.mdb) or an Excel spreadsheet. You might be wrestling with error messages like "The 'Microsoft.Jet.OLEDB.4.0' provider is not registered on the local machine" or "Unrecognized database format."

Before you click on a sketchy "download now" button from a third-party website, you need to understand a critical piece of Windows history. You cannot download Microsoft Jet OLEDB 4.0 as a standalone, modern installer from Microsoft anymore. Here is everything you need to know—what it is, why it is missing, how to get it, and the modern alternatives.

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