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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:
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DNG - Extension Details
Date Added: January 12, 2008
File Extension:  .DNG
Description 1: .DNG file extension is linked with Digital Negative Image File. This is the universal RAW image file format for saving digital photographs in uncompressed format. .DNG file format is a RAW image archival format which is developed by Adobe Systems and it is supported by various imageviewing and photoediting programs.
File Type:   Bitmap Image File
Mode: Binary
Program(s) to Open:  Windows: ACDSee Photo Manager, Adobe Photoshop CS, Adobe Photoshop Elements 3.0 or later version, Adobe Photoshop Lightroom, Windows Vista with Ardfry Imagings DNG codec; Mac: Adobe Photoshop CS, Adobe Photoshop Elements 3.0 or later version, Adobe Photoshop Lightroom, Apple Aperture 2 or later version, Apple Preview
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