Filename Extensions
If you are seeking information about file extensions, then you are in the right place at right time.

Details of extension .aspx

1 extension(s) and 0 alias(es) in our database

Below, you can find answers to the following questions:

  • What is the .aspx file?
  • Which program can create the .aspx file?
  • Where can you find a description of the .aspx format?
  • What can convert .aspx files to a different format?
  • Which MIME-type is associated with the .aspx extension?
ASP.NET Page .aspx file icon


ASPX file is an ASP.NET Page. ASP.NET was first released in January 2002 with version 1.0 of the .NET Framework, and is the successor to Microsoft's Active Server Pages (ASP) technology. (ASP is the server-side execution environment in Microsoft Internet Information Server that enables you to run scripts on the server.)
Category: Development files
Program name: -
Mime-type: text/plain
Magic bytes (HEX): -
Magic string (ASCII): -
Related extensions:
Active Server Page
Hypertext Markup Language Document
PHP Script
Cascading Style Sheets
JSP Markup Language
ASP.NET Application
Microsoft HTML Application
Multipurpose Internet Mail Extension HTML
ColdFusion Markup Language

Other types of files may also use the .aspx file extension. If you have helpful information about .aspx extension, write to us!

Is it possible that the filename extension is misspelled?

We found the following similar extensions in our database:

Advanced Stream Redirector
Alpha Five Database Index
Speex Compressed Audio
ArcGIS Geodatabase SPX File
Adobe After Effects XML Project
Ability Photopaint Image
WebSuite Compiled Active Page
Active Server Page
Alphacam Stone Post Data

The .aspx filename extension is often given incorrectly!

According to the searches on our site, these misspellings were the most common in the past year:

asx (4), spx (4), apx (2), aepx (1), asp (1)

Can't open a .aspx file?

If you want to open a .aspx file on your computer, you just need to have the appropriate program installed. If the .aspx association isn't set correctly, you may receive the following error message:

Windows can't open this file:

File: example.aspx

To open this file, Windows needs to know what program you want to use to open it. Windows can go online to look it up automatically, or you can manually select from a list of programs that are installed on your computer.

To change file associations:

  • Right-click a file with the extension whose association you want to change, and then click Open With.
  • In the Open With dialog box, click the program whith which you want the file to open, or click Browse to locate the program that you want.
  • Select the Always use the selected program to open this kind of file check box.

Supported operating systems

Windows Server 2003/2008/2012, Windows 7, Windows 8, Linux, FreeBSD, NetBSD, OpenBSD, Mac OS X, iOS, Android

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