Opening an ASAX File

The ASAX file type is primarily associated with ASP.NET.

ASAX	File extension: ASAX
	File type:	startup/termination script

What is an ASAX file?

ASAX files mostly belong to ASP.NET by Microsoft. An ASAX file is a script containing optional startup/termination methods for an ASP.NET session or application. Code saved in an ASAX file is derived from ASP.NET's HttpApplication class. They include application directives, render blocks, session variables, and references to markup files. Visual Studio integrated development environment can be used to create and edit the Global.asax file at the root directory of an ASP.NET application. Older versions of ASP.NET (ASP) used an ASA file instead of an ASAX file.

How to open an ASAX file

You need a suitable software like ASP.NET to open an ASAX file. You need a suitable software like ASP.NET from Microsoft to open an ASAX file. Without proper software you will receive a Windows message "How do you want to open this file?" or "Windows cannot open this file" or a similar Mac/iPhone/Android alert. If you cannot open your ASAX file correctly, try to right-click or long-press the file. Then click "Open with" and choose an application. You can also display a ASAX file directly in the browser:. Just drag the file onto this browser window and drop it.

Online ASAX Text Viewer

Choose your .asax file to analyze

or drag and drop it here

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.ASAX File Not Opening? How to Fix It:

Because .ASAX files can come from different programs, they aren't universally openable by a single application.

Identify the Source: These files are typically created by web developers building ASP.NET applications to handle application-level events like startup or termination.
Check the Header: Open the file in a basic text editor. You will likely see:
- <%@ Application %> directives indicating an ASP.NET script.
- Readable C# or VB.NET code.
- Plain text, confirming it's a web source file.
Use the Original Software: To properly edit or compile these files, use Microsoft Visual Studio, Visual Studio Code, or Notepad++. If uncertain, ask the sender.
Use this Webpage: Drag and drop the file into our viewer to detect the format, extract readable text or metadata, and preview when possible.

Technical Data for ASAX File Extension

File classification:

Web (source)

Related files:

aspx, asa, ashx

Related links:

Web Site File Types, Global.asax Syntax

Mime type:

application/x-aspx

The following listing is compiled from the database produced by the 'Associate This!' program, selected data from the main FILExt database and file extension information submitted by users.

ProgramID: asaxfile, AppName: Dreamweaver MX
EXEFile: Dreamweaver.exe

ProgramID: asaxfile, FileType: Active Server Application file, AppName: Internet Explorer
EXEFile: iexplore.exe

ProgramID: asaxfile, FileType: Active Server Application file, AppName: Microsoft Visual Studio NET 2002
EXEFile: devenv.exe

ProgramID: asaxfile
EXEFile: %ProgramFiles%\Microsoft Visual Studio .NET\Common7\IDE\devenv.exe /dde

ProgramID: BDS.ASAXFile
EXEFile: %ProgramFiles%\Borland\BDS\2.0\Bin\bds.exe /np

ProgramID: BDS.ASAXFile
EXEFile: %ProgramFiles%\Borland\BDS\3.0\Bin\bds.exe /np

ProgramID: VisualStudio.asax.7.1
EXEFile: %ProgramFiles%\Microsoft Visual Studio .NET

ProgramID: VisualStudio.asax.7.1
EXEFile: %ProgramFiles%\Microsoft Visual Studio .NET 2003\Common7\IDE\devenv.exe /dde

ProgramID: VisualStudio.asax.7.1
EXEFile: %ProgramFiles%\Visual Studio .NET 2003\Common7\IDE\devenv.exe /dde

ProgramID: VWDExpress.asax.8.0
EXEFile: %ProgramFiles%\Microsoft Visual Studio 8\Common7\IDE\VWDExpress.exe /dde %1

ProgramID: VisualStudio.asax.8.0
EXEFile: %ProgramFiles%\Microsoft Visual Studio 8\Common7\IDE\devenv.exe /dde %1

ProgramID: VisualStudio.asax.9.0
EXEFile: %ProgramFiles%\Microsoft Visual Studio 9.0\Common7\IDE\devenv.exe

ProgramID: VWDExpress.asax.9.0
EXEFile: %ProgramFiles%\Microsoft Visual Studio 9.0\Common7\IDE\VWDExpress.exe

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an asax startup/termination script is a special file format by Microsoft and should only be edited and saved with the appropriate software.

How to solve problems with ASAX files

Associate the ASAX file extension with the correct application.
Update your software that should actually open startup/termination scripts. Because only the current version supports the latest ASAX file format. Search, therefore, e.g. on the Microsoft manufacturer website after an available ASP.NET update.
To make sure that your ASAX file is not corrupted or virus-infected, get the file again and scan it with Google's virustotal.com.
Click here to open your .ASAX file online - secure, fast, and no downloads needed.