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File Extension Guide

 

All the file extensions on one website. Help guide to know what is a file extension about and how can you open files from a specific format.

File extension guide is a helpfull information site that is dedicated to describing computer file formats and how they relate to file extensions mainly on Microsoft Windows platform and other operating systems like Apple Mac OS X or Linux/Unix.

 

What is file extension?

 

A computer filename extension is usually a three or more letters combination added to the end of file name and separated by a dot character. File extension indicates the encoding convention (file format, file type) of its contents. Operating system like Microsoft Windows registers and associates file extension to a program(s). You can then by using some file manager (Windows Explorer, Total Commander, Apple Finder etc.) operate with file simple double-clicking at the file and you can view, open and edit, play, convert or extract desired file type specified by its file extension. The operating system does default action based on registered file extensions, installed applications or custom user settings - by default, it runs default application. For example: by clicking on music file (usually mp3 file extension) it opens default player and play the music file.

You can simply start to search file extension information by clicking at first letter link and browse for file types with extension by the letter it starts with.

This database was put together as an answer to overwhelming demand from millions of users who are confused about what application best to use to open each file. Now that files are exchanged over the internet on a regular basis this problem has become even more severe.

 

Display at your Windows operating system

By default, Windows is configured to hide filename extensions, the (usually three-leter) portion of the filename following the period. Aside from creating a knowledge gap between experienced and inexperienced users, this "feature" also can make it difficult to differentiate files with the same filename prefix. Overall, hiding filename extensions makes Windows more difficult to use.

To display file extensions at your Windows follow these steps:
- Open My Computer, and select Folder Options from the Tools menu (or choose Options from the View menu in Windows 95). If you don't see horizontal top menu, pressing Alt key may help to show it.
- Click on the View tab and turn off Hide file extensions for known file types, and press OK.

 

Types of File Extensions

There are many types of files that have different extensions. The extension of a file is the suffix located at the end of the file name, it is usually separated from the name by the period (.)

Then we will group the extensions by file types, classifying them as follows:
Text File Extensions

Identify flat text files such as .txt and .log and rich text files such as:

.doc Microsoft Word Document
.docx Microsoft Word Open XML Document
Log Log
.msg Outlook Mail Message
.odt OpenDocument Text Document
.pages Pages Document
.rtf Rich Text Format File
.tex LaTeX Source Document
.txt Plain Text File
.wpd WordPerfect Document
.wps Microsoft Works Word Processor Document

 

Graphics

They identify the images or graphic figures, they are examples of extensions of graphics:

.bmp Bitmap Image File
.gif Graphical Interchange Format File
.jpg JPEG Image
.png Portable Network Graphic
.psd Adobe Photoshop Document
.tga Targa Graphic
.thm Thumbnail Image File

 

Audio

They identify the files that contain sound, they are examples:
.aif Audio Interchange File Format
.iff Interchange File Format
.m3u Media Playlist File
.m4a MPEG-4 Audio File
.mid MIDI File
.mpa MPEG-2 Audio File
.ra Real Audio File
.wav WAVE Audio File
.wma Windows Media Audio File

 

Video

They identify the videos, they are examples:
.avi Audio Video Interleave File
.flv Flash Video File
.m4v iTunes Video File
.mov Apple QuickTime Movie
.mp4 MPEG-4 Video File
.mpg MPEG Video File
.rm Real Media File
.swf Shockwave Flash Movie
.vob DVD Video Object File
.wmv Windows Media Video File

 

Compressed

They identify the files that are packaged with in a single unit, they are examples:
.7z 7-Zip Compressed File
.cbr Comic Book RAR Archive
.gz Gnu Zipped Archive
.pkg Mac OS X Installer Package
.rar WinRAR Compressed Archive
.tar.gz Compressed Tarball File
.zip Zipped File
.zipx Extended Zip File