Click the "Select File" button above, and choose your ASMX file.
You’ll see a preview, if available.
Click the "Convert file to..." button to extract text information.
Convert ASMX to another file type
To convert ASMX web services to another format, you need Microsoft Visual Studio or other Web software.
Convert a file to ASMX
To convert other file formats to the "ASP.NET Web Service Script" file type, you need software like Microsoft Visual Studio or a similar tool.
About ASMX files
An .ASMX file is a web service file used by Microsoft's ASP.NET framework. It contains code and directives that facilitate the routing of incoming HTTP web service requests to the appropriate backend methods. These files are typically opened and edited with Microsoft Visual Studio or a basic text editor. You can learn more about the underlying framework on the ASP.NET Wikipedia page. The .ASMX format presents several disadvantages today. It is a legacy technology superseded by modern web APIs, meaning it lacks native support for modern RESTful routing and JSON, relying instead on bulky XML-based SOAP messages. Furthermore, these files require an IIS server environment to execute properly, meaning you cannot simply open and view the output in a standard web browser without a backend runtime. Users often need to convert or extract the embedded code into CS or VB files to migrate legacy services to modern frameworks, or convert them to TXT or XML to analyze the endpoint structures safely. Standard online converters usually fail with this format because they expect standard media or document files rather than server-side executable scripts. Just drag and drop your file onto convert.guru to identify the format, view the plain text source code, and convert it when possible. Even though only a compatible server can execute the service, our analysis allows you to inspect the internal code instantly and extract valuable text data.
Convert.Guru analyzes your ASMX file, detects the exact format, and lets you read the text inside.
If you want to convert ASMX file to WCF, WSDL, HTML, HTM, CSS, JS, PHP, ASP, ASPX, JSP, JSPX or PY, you can use Microsoft Visual Studio or similar software from the "Web Service Endpoint Script" category. In the File menu, look for Save As… or Export….
To convert RSS, CSS, CGI, SITEMAP, PL, WEBMANIFEST, JSON, JS, XML, HTML, ICO or HTM files to ASMX, try Microsoft Visual Studio or another comparable tool in the "Web Service Endpoint Script" category.
The ASMX Converter Story
The history of Convert.Guru began over 25 years ago in California with Tom Simondi’s file-format database. A former contributor to Space Shuttle development and a software pioneer of the 1980s, Simondi established a trusted resource for file type analysis that was even referenced by Microsoft Windows XP. Today, we use modern technology to process and convert thousands of file formats while continually improving our ASMX converter.