[top] Download Microsoft Jet Oledb 4.0 [Tested]

Downloading Microsoft Jet OLEDB 4.0: What You Need to Know (Before You Search)

If you landed here looking for a direct "Download" button for Microsoft Jet OLEDB 4.0, you might be frustrated. Here’s the honest truth: You cannot download Jet 4.0 as a standalone, redistributable package anymore.

But don't close this tab. Let me explain why, and more importantly, how to get the functionality you actually need for your legacy VB6, Access, or older .NET application.

Introduction: The Ghost of Databases Past

If you are reading this article, you are likely one of three people:

A legacy developer maintaining a Visual Basic 6.0 or classic ASP application written in the early 2000s.
An IT administrator trying to get an ancient Excel or Access reporting tool to work on Windows 10 or Windows Server 2019.
A student or analyst who found a code snippet online referencing Provider=Microsoft.Jet.OLEDB.4.0 and assumed you need to install something.

Here is the hard truth: You cannot legally or safely "download" the Microsoft Jet OLEDB 4.0 driver as a standalone installer from Microsoft anymore. download microsoft jet oledb 4.0

Microsoft officially declared the Jet database engine (version 4.0) deprecated years ago. In this article, we will explain why, where it actually comes from, and—most importantly—what you should use instead.

Download the Microsoft Access Database Engine 2016 Redistributable

This is the official replacement for Jet OLEDB 4.0. It supports:

Both 32-bit and 64-bit (choose the right installer).
Newer file formats: .accdb (Access 2007+) and .xlsx, .xlsb (Excel 2007+).
Backward compatibility: .mdb and .xls (older formats).
Provider name: Microsoft.ACE.OLEDB.12.0 (or Microsoft.ACE.OLEDB.16.0 for the 2016 version).

Where to download: Go directly to Microsoft Download Center and search for: Downloading Microsoft Jet OLEDB 4

"Microsoft Access Database Engine 2016 Redistributable"

Or use this direct link pattern (ensure it points to microsoft.com): https://www.microsoft.com/en-us/download/details.aspx?id=54920

Connection string example (modern replacement): A legacy developer maintaining a Visual Basic 6

Provider=Microsoft.ACE.OLEDB.12.0;Data Source=C:\Data\Northwind.mdb;Persist Security Info=False;

Common Gotchas & Warnings

Do NOT download from third-party "DLL download" sites. Those are often malware. There is no safe standalone Jet 4.0 installer outside of original Microsoft OS media.
64-bit vs 32-bit: You cannot mix architectures. If your app is 32-bit, you must use the 32-bit version of the driver (even on 64-bit Windows).
Modern alternative: If you own the source code, consider migrating to SQLite or LocalDB. Jet 4.0 is 25+ years old and unsupported.

Option C: Extract from an Old Windows Installer (Not Recommended)

If you absolutely need the original Jet 4.0 installer for an old 32-bit offline system, you can find it in the MDAC 2.8 or Jet 4.0 Service Pack 8 updates – but these are outdated and insecure. Microsoft removed them from public download.

Part 4: The Modern Replacement – What to Download Instead

For 99% of you landing on this page, you do not need Jet 4.0. You need to connect to Access or Excel files from modern code. Microsoft provides an official, supported download for this:

4. No Standalone Redistributable

Unlike the later Microsoft Access Database Engine 2010/2016 Redistributable, Jet 4.0 was never packaged as a standalone installer you could legally distribute. Any website offering Jet40SP8_9xNT.exe or similar is likely an old archive—not a supported Microsoft download.

For 64-bit Applications (Less common):

The 64-bit Jet driver was never officially released for desktop Windows. You likely need Microsoft ACE instead.