This article explains what an ASHX file is and how to use it. It also explains how to open it on your computer or convert it to another file format.

A file with the ASHX extension is an ASP.NET Web Handler file that often contains references to other web pages used in an ASP.NET web server application. The functions in the file are written in the C# programming language.

Most people only encounter this format by accident when trying to download a file from a website, such as a PDF file. This is because the ASHX file references the PDF file to send it to the browser for download, but does not name it properly, and adds .ASHX to the end instead of .PDF.

ASHX files are files used in ASP.NET programming and can be opened with any program that codes in ASP.NET, such as Microsoft Visual Studio and Microsoft Visual Studio Community.