The ASP.NET Compilation tool (Aspnet_compiler.exe) enables you to compile an ASP.NET Web application, either in place or for deployment to a target location such as a production server. In-place compilation helps application performance because end users do not encounter a delay on the first request to the application while the application is compiled. Aspnet_compiler.exe can be found in %Windows%\Microsoft.Net\Framework\v2.0.50727.

The ASP.NET Compilation tool is not available with versions of ASP.NET earlier than ASP.NET version 2.0.