Web services are generated from an existing web site having web page based business processes or transactions. A script is generated representative of a user navigation sequence involved to perform the transaction. The script elements include the web application calls, input/output parameters, and/or the interrelation between the elements of the transaction. A WSDL file, web service interface code, and web service implementation code are generated from the navigation script, and may be published locally to the web site or on a remote site.