DigiDoc Client container file
File type: Archive and compressed file
A .cdoc file is an encrypted container file used by DigiDoc Client.
The container stores encrypted files and the information needed to decrypt them for the intended recipients.
File type category:
Archive and compressed file
Date updated: October 16, 2026
The CDOC format is associated with DigiDoc Client, a Windows application for working with digitally signed and encrypted documents. It is used for DigiDoc container files that include encryption and recipient certificate information.
DigiDoc Client can create and verify digitally signed files and encrypt or decrypt files according to the W3C XML Encryption Recommendation. A CDOC file is one of the containers used by the application for encrypted content.
The format is a document container rather than a general-purpose compressed archive. Its contents should be accessed through DigiDoc Client, which can decrypt the container when the required credentials or private key are available.
Open the .cdoc file with DigiDoc Client on Microsoft Windows. The application can display the container details and decrypt its contents when the required credentials or private key are available.
A CDOC file cannot normally be converted directly to another file format. Use DigiDoc Client to decrypt it, then save or use the files contained in it separately.
Software applications that can open cdoc files:
Microsoft Windows
Software apps that create cdoc files:
Microsoft Windows
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