How to open ASPX files

ASPX files are not common but you will run into them if you download the source code for an app, you may get an APSX file or two in it. This file type may be uncommon for most end users but it is not difficult to open this file type.

open ASPX files

ASPX file

An ASPX file is created by a server running ASP.Net. This is basically a web page but instead of using the HTML language. It is processed and translated into HTML when the file is read or loaded by a website in a modern web browser.

As long as an ASPX file is opened, you will find it very easy to do. You do not need to set up a server, or install complex apps to do the job.

1. Open ASPX Files – Web Browser

The ASPX file is basically the document. The only reason you can’t open is because of the extension. Unlike an HTML file that you can open with a text editor, you need a PDF browser to open ASPX files.

  1. Open File Explorer.
  2. Go to See the tab.
  3. Enable the ‘Show extensions’ option.
  4. Navigate to the ASPX file and select it.
  5. Tap on the July F2.
  6. Change the ASPX to PDF.
  7. Confirm that you want to change the format.
  8. Right click on the file and open it in a modern browser like Chrome.

2. Use web development tools

If you convert an ASPX file to PDF and open it in a browser the file will not display properly, you can use a web development tool instead. There are many web development tools you can use but if you are looking for a free, easy to install and easy to set up tool, we strongly recommend using Notepad ++.

  1. Download and install Notepad ++.
  2. Open File Explorer and address to the ASPX file.
  3. Right click on the file and select Open with from the context menu.
  4. Select Notepad ++ to open the file.

3. Online web development tools

Web development apps allow you to open ASPX files in your browser. You do not need the conversion to PDF. Instead, the web app is able to read the APSX file as it is. No need to install additional apps as long as you have a modern browser like Chrome or Firefox installed on your system.

There are certain ASPX file viewers but not the most impressive online apps you will find. Try to use ASPX Browser Pro Pro Info to open an ASPX file in your browser.


If you have Microsoft Visual Studio installed on your system, it is best to use the app to view an ASPX file. Of course, Visual Studio also installs a lot of other things on your system to help with development, If you are not a developer, installing Visual Studio to view an ASPX file is quite high. Try one of the options we’ve listed instead for a much simpler approach.

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