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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
WER - Extension Details
Date Added: December 03, 2009
File Extension:  .WER
Description 1: File extension .WER is also short for Windows Error Reporting. It refers to error reports WER generates. The WER files capture the software crash data and aids users in providing crash info when errors are reported. This file format collects info for both computer operating system application crashes. WER forms part of Microsofts Winqual services, delivering quality control for hardware and software vendors.
File Type:   System file
Mode: Binary
Program(s) to Open:  Windows: Microsoft Winqual (Web service)
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