.DBX File Extension

Outlook Express E-mail Folder

Developer Microsoft
3.6  |  48 Votes

What is a DBX file?

A DBX file is a folder created by Outlook Express, a Microsoft email program. It contains email messages for a specific mailbox. DBX files are typically saved within the Documents and Settings user directory and may be copied to another folder in order to back up email messages.

More Information

DBX folders have names corresponding to their email mailbox. For example, common names are Inbox.dbx, Sent Items.dbx, Drafts.dbx, and Deleted Items.dbx. Folders.dbx stores the master index for all the mailboxes. If it is missing, Outlook Express will re-index the mailboxes and recreate it.

DBX mail folders can be imported into Windows Mail (included with Windows Vista) by selecting File → Import → Messages, then choosing Import mail from an OE6 store directory and selecting the DBX folder you would like to import.

DBX folders can be imported into Windows Live Mail (included with Windows 7) by selecting File → Import → Messages → Microsoft Outlook Express 6 and locating the appropriate DBX folder.

The Stellar DBX to PST Converter program can be used to convert Outlook Express DBX files to the Outlook .PST format. You can then save converted files to Office 365, HTML, RTF, and PDF formats.

NOTE: DBX folders should only be opened in Outlook Express or imported using another program. If opened or edited manually, they can become corrupted and cause Outlook Express not to function properly.

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Programs that open or reference DBX files

AutoCAD Database Extension File

Developer Autodesk
3.1  |  10 Votes

Extension file used by AutoCAD, an engineering and design CAD application; contains custom information used to read and write drawing information; written using Autodesk's ObjectDBX API, which enables developers to programmatically access drawing components.

More Information

Third-party developers can read .DWG files by creating DBX extensions. For example, some versions of Adobe Acrobat bundle several DBX files for reading Autodesk CAD drawings.

Programs that open or reference DBX files


Dropbox Encrypted Database File

Developer Dropbox
4.0  |  3 Votes

A DBX file contains an encrypted database used by Dropbox, an online file hosting service. It stores encrypted information about a user's Dropbox in .SQLITE record format. DBX files may include recently modified files, the local path to a Dropbox folder, and the email address of the user.

More Information

DBX files are used by Dropbox to store various types of data and are similar to .DB database files but are encrypted. The name of the file indicates what type of information is contained in the file, such as filecache.dbx, notifications.dbx, photo.dbx, or config.dbx.

DBX files are stored in various folders in Dropbox installation directories. The config.dbx is stored in the following locations:

Windows XP:
C:\​Documents and Settings\​%USERNAME%\​Application Data\​Dropbox\​
C:\​Documents and Settings\​%USERNAME%\​Local Settings\​Application Data\​Dropbox\​

Windows Vista, 7, 8, 8.1, and 10:



Programs that open or reference DBX files

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