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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
HGL - Extension Details
Date Added: April 12, 2008
File Extension:  .HGL
Description 1: .HGL file extension is linked with AutoVue Graphic Plugin File. This is the file extension for the graphic plugin file utilized by AutoVue 2D an application that provides secure and efficient means to digitally review, access, track feedback and communicate on 2D designs and various business documents. .HGL file extension and AutoVue 2D are owned and developed by Oracle.
File Type:   Plugin File
Mode: ASCII
Program(s) to Open:  Windows & Mac: Oracle AutoVue 2D
Common:
Extension: