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What is the .W File Extension?

.W File Extension Description:

The format .w file extension is closely associated with the Mozilla web browser, which is a third party software development that has become a popular choice for many Internet surfers, because of its relatively small system resource demands. The file extension .w is specifically associated with the browser's automatic form fill feature, which is invoked once a form that consists of at least two fields is launched in the browser.

The file extension .w is responsible for saving the user's information that will be used in filling up web form entries, which can range from any personal information that was previously provided by the user. The data file that is retrieved by the browser usually takes the form of a number representing the rootname, and appends the .w file extension for identity.

The concept of the mechanism behind the file extension .w is to provide the user with a simpler way of dealing with web form coding, which can be very tedious especially with the process of going from one field to another. The file extension .w normally contains the most frequently used personal information of the user that is requested by web forms. However, as an additional protection, the user also has the option of toggling the feature supported by the .w file extension.

In the same manner, the user can specify from a list of information contained in the file extension .w, the data that he is willing to make available. The browser also provides the functionality of managing the stored personal data, to minimize any complexities of the process for faster access to information.

Aside from storing personal information, the file extension .w is also used in relation to the source code generated for the Database AppBuilder. Like many high level language code files, the .w file extension is coded in ASCII format for easy readability with one small difference. The file extension can be opened with any text editing or word processing program, but can only be edited with the AppBuilder software.

The file extension .w is likewise implemented as a world file by the Train Simulator computer game, which is a first person role playing scenario with the gamer acting as the train engineer. The task of the file extension .w is similar to the role of map files in other computer based games.

Author:, Progress Software Corporation, Microsoft Corporation
Author URL:,
Related Applications: Mozilla Browser, AppBuilder, Train Simulator
Common Path: C:/ Program Files/


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Do you have errors with .W files?

The Cause for .W files Errors:

.W files errors are potential severe Windows file errors and can be brought on due to a broken registry entry that should be rectified immediately to prevent additional corruption in other applications and/or hardware. During the time the errors persist your system remains capable of possible blue screen errors, hardware failure and fatal crashes.

Symptoms of .W files Errors:

Typical symptoms with .W files errors include poor pc performance, excessive application load speed, failure opening files, extended pauses in application functions, applications closing without an indication of error, screen halts and software crash.

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What is the .W File Extension?    |    Scan for .W File Extension Errors    |    How to Fix .W File Extension Errors