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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
H - Extension Details
Date Added: March 11, 2008
File Extension:  .H
Description 1: .H file extension is linked with Miranda IM SmileyAdd Plugin file. It is the file utilized by Miranda Plugin called SmileyAdd. Miranda IM is an instant messaging client for Windows. It offers multiprotocol support which allows other IM client users to connect to Miranda IM. It is very light on system resources as well as very fast to connect. Miranda IM doesnt require installation and can fit a single floppy disk or USB flash drive. It also offers multiple plugins of up to 350. And it is one of the most customizable and flexible IM clients of today.
Description 2: .H file extension is linked with Header File [normally with .C or .CPP file] usually referenced by a Java or C++ source code. This file may contain constants, functions and variables that are utilized by other files within a program. It also allows commonlyused functions to be referenced and written only once by other source files when required. The standard file format of Header File is supported by various programs.
Description 3: .H file extension is linked with Apache http web server related file. Files with .H extensions were found in Apache http server installations and may possibly contains mods in plain text or script file formats. .H file extension is associated with Apache http server and it is a project that aims at developing and maintaining opensource http server for modern OS such as Windows NT and UNIX. .H file extension and Apache http server are owned and developed by The Apache Software Foundation.
Description 4: .H file extension is linked with ADS Include File. This file extension is utilized by Autodesk applications such as AutoCAD a computeraided design platform which provides users the necessary tools to create customized AutoCADbased software products for particular markets and extended design information to nonAutoCAD users. .H file extension and AutoCAD are owned and developed by Autodesk Inc.
Description 5: .H file extension is linked with VMware File. This is the file extension utilized by VMware for its data files. VMware Workstation as it is properly known, is an application that allows multiple operating systems to run simultaneously in the same PC. This application helps reduce hardware cost of up to 50%, allows automation and streamlining of tasks to save time and to enhance productivity. .H file extension and VMware Workstation are owned and developed by VMware Inc.
File Type:   Data File
Mode: ASCII
Program(s) to Open:  VMware Workstation is supported by various operating systems
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