.DUB File Extension

Windows Spelling Dictionary Identifier

Developer Microsoft
3.5  |  2 Votes

What is a DUB file?

A DUB file is a Windows system file used to add a spelling dictionary to Windows applications, such as Microsoft Word and Internet Explorer. DUB files, the most notable of which is MsSp7en-us.dub, are found in the C:/​Windows/​Globalization/​ELS/​SpellDictionaries directory.

More Information

Windows spelling dictionaries are comprised of three files: a .LEX file, an .ACL file, and a .DUB file. The LEX file contains data used to check a user's spelling and grammar, the ACL file contains data used to auto-correct a user's spelling and grammar mistakes, and the DUB file contains a small amount of data that, potentially, is used to identify the dictionary's language. However, at this time, DUB files' true purpose is unknown.

Common DUB Filenames

MsSp7en-us.dub - Name of the DUB file associated with the English (United States) Microsoft spelling dictionary.

How to open a DUB file

DUB files are Windows system files and are not meant to be opened.

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Programs that open or reference DUB files

Not meant to be opened

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