An aspx file extension is associated with Active Server Page Extended format used by Internet Information Services (IIS) web server with server side scripting language ASP.NET used to dynamically generate websites. Generated output from an *.aspx page in your browser is common html page.
Software that works with aspx file extension
ASPX file - Active Server Page Extended ASP.NET script
What is aspx file? How to open aspx files?
The aspx file extension is associated with ASP.NET dynamic web pages, known also as as web forms and are based on the Microsoft ASP.NET programming framework.
These pages are generated by Internet servers. The ASP.NET code is compiled and interpreted by the server and then sent to a user web browser and and displayed as a web page.
ASP.NET pages are the main building block for web application development. The Web forms are contained in files with an .aspx file extension. These files typically contain static (X)HTML markup, as well as markup defining server-side Web Controls and User Controls where the developers place all the required static and dynamic content for the web page.
The native application, that uses ASPX script files is ASP.NET server (mainly Microsoft IIS - Internet Information Services).
ASPX script files can be written in Microsoft Visual Studio, WebMatrix or other development tools and web pages, that are written in ASP.NET and using ASP.NET, can be viewed in any Internet browser such as Internet Explorer, Firefox, Opera, Chrome or Safari.
Updated: July 2, 2018
The default software associated to aspx file type:
Company or developer:
Microsoft Corporation
Microsoft ASP.NET is web application framework used by web programmers to crate web applications, web services and dynamic web sites. Source code of ASP.NET web is written in static (X)HTML and dynamic parts use .NET source code. ASP.NET pages work in all web browsers, such as Firefox, Internet Explorer, Safari, Opera etc.
Microsoft Internet Information Services 
Company or developer:
Microsoft Corporation
Microsoft Internet Information Services (IIS) is web server application distributed with Microsoft Windows Server as well as some editions of Microsoft Windows. IIS supports HTTP, HTTPS, FTP, FTPS, SMTP and NNTP protocols.
Company or developer:
Microsoft Corporation
Microsoft Visual Studio is an integrated development environment (IDE) used to create applications for Microsoft Windows, Windows Mobile, .NET Framework, Silverlight as well as dynamic websites and web applications. Visual Studio is available for Windows and Mac.
List of software applications associated to the .aspx file extension
Recommended software programs are sorted by OS platform (Windows, macOS, Linux, iOS, Android etc.)
and possible program actions that can be done with the file: like open aspx file, edit aspx file, convert aspx file, view aspx file, play aspx file etc. (if exist software for corresponding action in File-Extensions.org's database).
Hint:
Click on the tab below to simply browse between the application actions, to quickly get a list of recommended software, which is ableto perform the specified software action, such as opening, editing or converting aspx files.
- Open aspx file
- Edit aspx file
- View aspx file
- Create aspx file
- Others aspx file
Software that open aspx file - Active Server Page Extended ASP.NET script
Programs supporting the exension aspx on the main platforms Windows, Mac, Linux or mobile. Click on the link to get more information about listed programs for open aspx file action.
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