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The File Extension Library

What is a file extension?

Short answer: it's the set of letters after the period (.) in the name of a file.

Long answer: File extensions signify the file format of a file. It tells the operating system (OS) how data was stored in the file. Not all OS, require a file extension though. For instance, this is optional in Unix, but is mandatory with MS-DOS and Windows systems.

In most file formats the file type is actually defined by the contents (first bytes, file structure), but extensions are used to define the application that is used for opening the file.

Below is a detailed database of thousands of file extensions our team has compiled for you. Feel free to browse!


Browse all Extensions:
ABCDEFGHIJKLMNOPQRSTUVWXYZ
DC3 - Extension Details
Date Added: February 09, 2008
File Extension:  .DC3
Description 1: .DC3 file extension is linked with Medicine image file format where images are saved in DICOM [Digital Imaging and Communications in Medicine] format. This application is developed by NEMA [National Electrical Manufacturers Association] as a standardized distributions and viewing of medical images with the likes of CT scans, MRIs and ultrasound. .DC3 file extension is also associated with Adobe Creative Suite from Adobe Systems Incorporated.
File Type:   Bitmap image file
Mode: Binary
Program(s) to Open:  Windows & Mac: DICOM, Adobe Creative Suite
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