File Extension OCS

.OCS File

File extension: OCS
File type: Digitally Signed Document

Notes about the OCS file extension:

To open this file type, a required software must be installed. Without it you only see a Windows message "The following file cannot be opened" (Windows 7) or "How do you want to open this file?" (Windows 10) if you double-click the file. There click on "More apps" and choose a suitable software to view such files on your PC or from email attachments.

The OCS file type is primarily associated with 'eDoc DigiSign' by Fujitsu Denmark. [Link is in Danish.] The .OCS file is a digital signature file formatted occording to the PKCS#7 standard. The document that is signed may be any kind, e.g., Word document, text file, or .EXE file.

Detailed information for file extension OCS:

Primary association: eDoc DigiSign
Company: Fujitsu Denmark
Mime type: application/x-edocdigisign
Related links: Viewer [Danish Link]

To change file associations press Windows Key + X and then Apps and Features > Default apps > Choose default apps by file type. Invalid file associations could be the result of underlying issues within your Windows PC.

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