PCauthorities.com presents…
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
PPTX - Extension Details
Date Added: January 01, 1970
File Extension:  .PPTX
Description 1: Files with a .PPTX extension refer to the presentation format that Microsoft PowerPoint 2007 (a part of Office 12) introduced. These files are used to store slides that were utilized for presentations or slideshows. PPTX files include images and text along with other media, and take from or are based on the Open XML format. ZIP compression is used for smaller PPTX file sizes.
File Type:   Data file
Mode: ASCII
Program(s) to Open:  Windows: Microsoft PowerPoint 2007, PowerPoint 2000, XP and 2003 with supporting components Macintosh: Microsoft Office Open XML File Format Converter
Common:
Extension: