How to Convert ACCDB to MDB – MS Access Database Tips!

Have you ever faced the challenge of requiring to convert ACCDB to MDB format? Maybe you’re working with an older database system, or perhaps you’re looking to integrate data into a legacy application. Whatever the reason, converting MS Access .accdb to .mdb can be a crucial task. In this blog, we will walk you through the process, step by step, ensuring you have all the information you need for a successful conversion.

how to convert ACCDB to MDB

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Why Change ACCDB to MDB Database File?

There are various advantages of the .accdb conversion process, including:

  1. Better Compatibility– Some older systems, applications, or databases only support the .mdb format.
  2. Performance– In certain cases, MDB files may perform better with specific operations or queries in environments optimized for the older format.
  3. Integration with Other Applications– If you’re integrating with other applications or platforms that only support MDB, converting ensures seamless data exchange and functionality.
  4. Software Limitations– Certain tools might only be supported with the MDB format.
  5. Macros and Code– Some VBA code or macros written for older Access versions might not work correctly in ACCDB without modification.

Also Read: How to Convert MDB to ACCDB File? – (Complete Guide)

How to Convert ACCDB to MDB in Access Database?

Here are the complete steps to convert Accdb Database to an Earlier File Format:

Firstly you need to create one copy of your Access database in the file format that you specify.

  • First, open your access database.
  • Hit on the File
  • From the left option, tap to the open
  • From the open dialog box, choose and open up the database which you need to convert.

Now it’s time to convert your database from accdb to mdb format.

  1. Hit the File
  2. Within the File Types, tap to the Save Database As an option.
  3. From the opened Save Database As opened dialogue box, select one of the following options:

how to convert ACCDB to MDB in Access

  • Access 2002 – 2003 Database (*.mdb):

This will save the copy of your database in a .mdb format which can be easily opened using Access database 2002/2003 versions.

  • Access 2000 Database (*.mdb):

Through this option, you can easily save the copy of your database in .mdb file format which can be opened using Access 2000.

4. After choosing one of the above options, in Saves As dialogue box. Assign a name to your database file, in the given file name box and then click on the save

After performing all these tasks Access will close the original database. And open up a new copy of the database in the file format that you have specified. All the changes you make in your database will affect the new copy. To make changes to the original database, you need to reopen your original database.


To convert Access 2007 database to other older versions like Access 97 or earlier. You need to first use Access 2007 to convert the database to Access 2000 or Access 2002 – 2003 version file format. Then only you can use the older version of Access for the easy conversion of your Access database to the format you need.

What Factors Prevent Conversion Of Access ACCDB To An Earlier File Format?

Some features and data types use only accdb file format and are not supported by the Access database’s earlier version. If your Access database contains any of these features and try to save it in older access database versions. Then your access database will display a message and deny conversion of accdb to mdb format.

Here are the following factors which prevent the conversion of Access database accdb to mdb format:

Factor 1- Use Of New Data Types Or Field Property Settings:

Following are the data types and field property settings which is not well supported by the earlier Access database version.

  • the data type of the attachments
  • History-tracking Long Text (Memo) fields (Long Text – Memo fields that have the Append Only property set to Yes)
  • Multi-valued lookup fields (lookup fields that have the Allow Multiple Values property set to Yes)
  • Calculated data type

Well, you can’t convert Access database .accdb to .mdb format unless you stop your Access database to use these features.

Factor 2- Links To External Files That Are Not Supported By Earlier Versions Of Access:

Access database .accdb format allows linking of several types of data that are not well supported by older Access versions.

  • Tables in other .accdb file format databases
  • Excel worksheets using the .xlsx format
  • Windows SharePoint Services lists

If the database includes links to these types of data sources, you need to delete links before the conversion.  Another solution is to import the data instead of linking to it so that the data is contained in the database itself.

Factor 3- Database Encryption

Access database file of ACCDB format opts for a new password encryption method incompatible with earlier Access versions. If you are trying to convert the encrypted Access database, then firstly you need to decrypt your Access database.

Check out the following post on How To Encrypt/Decrypt OR Crack MS Access Database Password In Just Few Simple Steps…!

How to Convert ACCDB to MDB Online Free?

The best ACCDB to MDB converter online tool is Anyconv. It is one of the free online services that can help you to transform ACCDB to MDB or vice-versa successfully. To know how to use this service, follow the below instructions carefully:

ACCDB converter online tool

  • Now, download the converted file instantly.

Also Read: Convert MS Access to SQL Server Easily!

Related FAQs:

What Is the Maximum File Size for Access MDB?

2 Gigabytes is the maximum file size for an Access MDB file.

Is ACCDB The Same As MDB?

No, ACCDB is the latest file format of the Access database & its data encryption is stronger than MDB.

How to Convert MDB to ACCDB Without Access?

By using some online file conversion services, you can convert MDB to ACCDB without Access.

How Do You Save An Access Table As MDB?

To save an ACCDB database table as MDB, open a specific database >> select File menu > Save As > MDB.

How to View .accdb Files?

ACCDB files can be opened & viewed with Microsoft Access.

Bottom Line

Above are some of the tried & tested methods on how to convert ACCDB to MDB in Access. So, follow them one by one and get your job done instantly.

Moreover, you can go with Access Repair Software if you face any issues while handling your Access database. I hope the article has well answered your question on how to change ACCDB to MDB format.

tip Still having issues? Fix them with this Access repair tool:

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  1. Download Stellar Repair for Access rated Great on Cnet (download starts on this page).
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  3. Click Repair button to repair & preview the database objects.

Pearson Willey is a website content writer and long-form content planner. Besides this, he is also an avid reader. Thus he knows very well how to write an engaging content for readers. Writing is like a growing edge for him. He loves exploring his knowledge on MS Access & sharing tech blogs.