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

The CID file is an EL-CID Data. The Equipment Location-Certification Information Database (EL-CID) was developed to provide an automated tool to support electronic processing of spectrum certification requests at NTIA.
✅ coDiagnostiX User Defined Implant Data

The CID file is a coDiagnostiX User Defined Implant Data. CoDiagnostiX is a sophisticated and user-friendly dental implant planning software.
✅ Navigator Chart Image Description

The CID file is a Navigator Chart Image Description. Navigator is a celestial navigation software for Microsoft Windows.
⚠ Be careful with .cid files.
It's important to know that the .cid file extension can be used by various programs, not just the ones you expect. This includes potentially harmful software or malware that might create .cid files. Be cautious when dealing with .cid files from unknown sources.
🚫 The .cid 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 .cid 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 .cid file
It means that the operating system does not have a default app associated with the .cid file type. To resolve this issue and open the file, you can take the following steps:
- Right-click on the .cid 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 .cid 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 .cid file extension, write to us.