- The quick facts

What are APPLICATION files and how to open them

Are you having problems opening an APPLICATION file or just wondering what they contain? We explain what these files are used for and show you software that we know can open or otherwise handle your files.

What is an APPLICATION file?

Files that contain the .application file extension are most commonly associated with the ClickOnce technology that was created by Microsoft. These files are saved in the XML format.

ClickOnce is used to deploy Windows Presentation Foundation-based software or Windows Forms. The files contain application deployment information and are created to allow for "one-click" start-up of various Windows applications. The APPLICATION files may also identify the attributes that are used for the updates of the associated application.

An APPLICATION file is similar to a Java Web Start file, however, APPLICATION files are for the Windows operating platform instead of the Java computer platform.

How to open APPLICATION files

Important: Different programs may use files with the APPLICATION file extension for different purposes, so unless you are sure which format your APPLICATION file is, you may need to try a few different programs.

We have not yet verified any programs for Windows that work with this specific file format. If you know one, please use the 'Suggest a program' link below. Thanks!

Last updated: July 13, 2020

Suggest another file format using extension APPLICATION

While we know of one file format using the .APPLICATION file extension, there may be more. It is widespread that different programs use files with the same file extension for very different types of data. Please let us know if you are aware of a different kind of .APPLICATION file.