DDOC file format description

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

1 filename extension(s) found in our database.

.ddoc - DigiDoc Digital Signature

The DDOC data files are related to DigiDoc. The DDOC file is a DigiDoc Digital Signature. DigiDoc is a system that's widely-used in Estonia for storing, sharing and digitally signing documents.

Data files
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DigiDoc Digital Signature related extensions:
DigiDoc BDOC Digital Signature
DigiDoc Crypted Document
DigiDoc PKCS#12 Certificate

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

Can't open a .ddoc 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 .ddoc file extension is often given incorrectly!

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

cdoc, ddc, ddo, doc, edoc, fdoc, rdoc, sdoc, vdoc, wdoc, xdoc

Is it possible that the filename extension is misspelled?

Similar file extensions in our database:

DigiDoc Crypted Document
WriteOnline Document
Microsoft XPS Document Settings
Clicker Document
QuarkXPress 3.0 Document
Ruby RDoc Document

Operating systems

DataTypes.net 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 .ddoc file format, then write to us!

DataTypes.net >> DDOC file