Download Microsoft Jet Oledb 4.0 !link! Site
If your app requires 64-bit compatibility, I recommend using the (2010 or 2016) instead of searching for the 32-bit Jet provider. Enabling 32-bit compatibility in IIS ? Converting an .mdb file to .accdb ? Share public link
If you landed here looking for a direct "Download" button for , you might be frustrated. Here’s the honest truth: You cannot download Jet 4.0 as a standalone, redistributable package anymore.
If you are trying to connect an older application (like a VB6 project or a classic ASP website) to a Microsoft Access database, you have likely encountered an error stating that the provider is not registered.
If your application absolutely requires the exact Jet 4.0 OLEDB provider and no substitute works, your only safe option is to: download microsoft jet oledb 4.0
If your website or web service connects to an Access database via Jet and crashes on a 64-bit server, change your Application Pool settings. Open the . Click on Application Pools in the left connections pane. Select the Application Pool assigned to your website. Click Advanced Settings in the right actions pane. Set Enable 32-Bit Applications to True . Click OK and recycle the application pool. 3. For End-Users Running Third-Party Software
: On 32-bit Windows systems, the Jet engine is typically pre-installed and updated via Windows Update. Legacy Service Packs : Official downloads like Jet 4.0 Service Pack 8 (SP8)
Important: Jet OLEDB 4.0 is an older data access provider included with Microsoft Data Access Components (MDAC) and historically shipped with Windows and Office. It is not provided separately as a modern Microsoft download for newer Windows versions; on 64-bit systems Microsoft Jet 4.0 is unsupported for 64-bit processes. For modern development use Microsoft Access Database Engine (ACE) or other supported providers. If your app requires 64-bit compatibility, I recommend
Microsoft Access Database Engine 2010 Redistributable
The Joint Engine Technology (JET) engine was the default database system for Microsoft Access up to the 2003 version. The OLEDB (Object Linking and Embedding Database) provider acts as a communication bridge. It translates data requests between your software application and the database files. JET OLEDB 4.0 vs. ACE OLEDB
: It is typically included by default in most 32-bit Windows installations . However, users on modern systems often cannot find it for standalone download because it has been superseded . Share public link If you landed here looking
"The 'Microsoft.Jet.OLEDB.4.0' provider is not registered on the local machine" The Reason:
If a 64-bit application tries to call the Jet 4.0 provider, the system throws an error. The error typically reads: Because the 64-bit application cannot see the 32-bit registry entries, it assumes the provider is missing. How to Fix the Error Without Downloading
How to Fix "Microsoft.Jet.OLEDB.4.0 Provider Is Not Registered"
(Note: The ACE provider seamlessly reads older .mdb files, meaning you do not have to convert your database file format just to update the driver). Summary of Best Practices
, like Notepad or Calculator. If you were using a 32-bit application and needed to connect to an Provider=Microsoft.Jet.OLEDB.4.0 was your go-to connection string. Microsoft Learn The 64-Bit Crisis