DOCT file format description

Many people share .doct files without attaching instructions on how to use it. Yet it isn’t evident for everyone which program a .doct file can be edited, converted or printed with. On this page, we try to provide assistance for handling .doct files.

1 filename extension(s) found in our database.

.doct - OnlyOffice Internal DOCX Document

The DOCT document files are related to OnlyOffice. The DOCT file is an OnlyOffice Internal DOCX Document. OnlyOffice is a cloud office that enables you to manage documents, projects, team and customer relations in one place.

Document files
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OnlyOffice Internal DOCX Document related extensions:
OnlyOffice Internal PPTX Document
OnlyOffice Internal XLSX Document

Naturally, other applications may also use the .doct file extension. Even harmful programs can create .doct files. Be especially cautious with .doct files coming from an unknown source!

Can't open a .doct file?

When you double-click a file to open it, Windows examines the filename extension. If Windows recognizes the filename extension, it opens the file in the program that is associated with that filename extension. When Windows does not recognize a filename extension, you receive the following message:

Windows can't open this file:


To open this file, Windows needs to know what program you want to use to open it. Windows can go online to look it up automatically, or you can manually select one from a list of programs that are installed on your computer.

To avoid this error, you need to set the file association correctly.

The .doct file extension is often given incorrectly!

According to the searches on our site, these misspellings were the most common in the past year:

dct, dict, dlct, doc, dost, dot, oct

Is it possible that the filename extension is misspelled?

Similar file extensions in our database:

Corel WordPerfect Document
DICT Data File
Graphviz DOT File
Adobe Illustrator Dictionary
DoStudio Subtitle Format Data
Spellswell Dictionary

Operating systems currently supports the following operating systems:

Windows XP/Vista, Windows 7/8/10, Windows 11, CentOS, Debian GNU/Linux, Ubuntu Linux, FreeBSD, macOS, Mac OS X, iOS, Android

If you find the information on this page useful, please feel free to link to this page.

If you have useful information about the .doct file format, then write to us! >> DOCT file