MDE File Extension

What is MDE file?

MDE is an extension file format for Microsoft Access used to add new features and options for the program, such as macros, advanced queries, or database views. Some MDE extensions may be necessary for certain databases, for example databases that use some form of proprietary encryption algorithms that require dedicated extension in order to access database entries.

Compiled extension file

Access extensions can be divided into two groups or formats:

• MDE – binary format (compiled)
• MDA – source code files

Both formats offer the same functionality and store code written in Visual Basic. MDE compiled files cannot be opened to view the source code or modify it. MDA files can be used as a base for MDE files.

Programs which support MDE file extension

Below is a table that list programs that support MDE files. Files with MDE suffix can be copied to any mobile device or system platform, but it may not be possible to open them properly on target system.

Updated: 07/23/2022

How to open file with MDE extension?

Being unable to open files with MDE extension can be have various origins. Fortunately, most common problems with MDE files can be solved without in-depth IT knowledge, and most importantly, in a matter of minutes. The list below will guide you through the process of addressing the encountered problem.

Step 1. Get the Microsoft Access

Problems with opening and working with MDE files are most probably having to do with no proper software compatible with MDE files being present on your machine. This issue can be addressed by downloading and installing Microsoft Access or different compatible program, such as Microsoft Office, Microsoft Excel, Office 365. Above you will find a complete listing of programs that support MDE files, classified according to system platforms for which they are available. If you want to download Microsoft Access installer in the most secured manner, we suggest you visit Microsoft Corporation website and download from their official repositories.

Step 2. Check the version of Microsoft Access and update if needed

If the problems with opening MDE files still occur even after installing Microsoft Access, it is possible that you have an outdated version of the software. Check the developer’s website whether a newer version of Microsoft Access is available. Sometimes software developers introduce new formats in place of that already supports along with newer versions of their applications. The reason that Microsoft Access cannot handle files with MDE may be that the software is outdated. All of the file formats that were handled just fine by the previous versions of given program should be also possible to open using Microsoft Access.

Step 3. Associate Compiled Access Add-in Format files with Microsoft Access

If the issue has not been solved in the previous step, you should associate MDE files with latest version of Microsoft Access you have installed on your device. The process of associating file formats with default application may differ in details depending on platform, but the basic procedure is very similar.

Change the default application in Windows

• Choose the Open with entry from the file menu accessed by right-mouse clicking on the MDE file
• Click Choose another app and then select More apps option
• Finally select Look for another app on this PC, point to the folder where Microsoft Access is installed, check the Always use this app to open MDE files box and conform your selection by clicking OK button

Change the default application in Mac OS

• From the drop-down menu, accessed by clicking the file with MDE extension, select Information
• Proceed to the Open with section. If its closed, click the title to access available options
• From the list choose the appropriate program and confirm by clicking Change for all....
• A message window should appear informing that This change will be applied to all files with MDE extension. By clicking Continue you confirm your selection.

Step 4. Ensure that the MDE file is complete and free of errors

You closely followed the steps listed in points 1-3, but the problem is still present? You should check whether the file is a proper MDE file. Problems with opening the file may arise due to various reasons.

1. Check the MDE file for viruses or malware

If the file is infected, the malware that resides in the MDE file hinders attempts to open it. Immediately scan the file using an antivirus tool or scan the whole system to ensure the whole system is safe. If the MDE file is indeed infected follow the instructions below.

2. Ensure the file with MDE extension is complete and error-free

If the MDE file was sent to you by someone else, ask this person to resend the file to you. It is possible that the file has not been properly copied to a data storage and is incomplete and therefore cannot be opened. When downloading the file with MDE extension from the internet an error may occurred resulting in incomplete file. Try downloading the file again.

3. Verify whether your account has administrative rights

Sometimes in order to access files user need to have administrative privileges. Log in using an administrative account and see If this solves the problem.

4. Check whether your system can handle Microsoft Access

The operating systems may note enough free resources to run the application that support MDE files. Close all running programs and try opening the MDE file.

5. Check if you have the latest updates to the operating system and drivers

Regularly updated system, drivers, and programs keep your computer secure. This may also prevent problems with Compiled Access Add-in Format files. It may be the case that the MDE files work properly with updated software that addresses some system bugs.

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