CDOC file: How can I open a .CDOC file?
The table below provides useful information about the .cdoc file extension. It answers questions such as:
- What is the .cdoc file?
- What program do I need to open a .cdoc file?
- How can the .cdoc file be opened, edited or printed?
- How can I convert .cdoc files to another format?
We hope you find this page helpful and a valuable resource.
✅ DigiDoc Crypted Document

The CDOC file is a DigiDoc Crypted Document. DigiDoc is a system that's widely-used in Estonia for storing, sharing and digitally signing documents.
✅ Clicker Document

The CDOC file is a Clicker Document. Crick Software Clicker is a literacy tool used by teachers to create curriculum resources tailored to student needs.
⚠ Be careful with .cdoc files.
It's important to know that the .cdoc file extension can be used by various programs, not just the ones you expect. This includes potentially harmful software or malware that might create .cdoc files. Be cautious when dealing with .cdoc files from unknown sources.
🚫 The .cdoc file extension is often given incorrectly!
According to the searches on our site, these misspellings were the most common in the past year:
Is it possible that the filename extension is misspelled?
We found the following similar file extensions in our database:
🔴 Can't open a .cdoc 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:
Select an app to open this .cdoc file
It means that the operating system does not have a default app associated with the .cdoc file type. To resolve this issue and open the file, you can take the following steps:
- Right-click on the .cdoc file. A context menu will appear.
- From the context menu, select Open with. Windows will display a list of recommended apps.
- If the desired app is listed, select it from the provided options.
- If you cannot find the appropriate app, you may need to install software that supports the specific file type.
If you don't know how to change the default app for the .cdoc file, check the FAQ.
🔴 Can I change the extension of files?
Changing the filename extension of a file is not a good idea. The extension of a file serves as a hint to the operating system and various software programs about the type of data contained within the file. When you alter a file's extension, you essentially modify how software applications interpret and handle that file. Every file has a specific format, also known as its file type or file format. The problem is, changing the file extension does not change the file format.
If you have helpful information about the .cdoc file extension, write to us.