This professional WAP emulator displays mobile websites exactly as if they were loaded by real handsets. It supports all types of mobile web documents, such as WML, XHTML MP, HTML and cHTML. WAP Proof works over HTTP as an ordinary HTML browser and has the most of its features, such as using bookmarks, changing the document encoding, offline working. Additional features are particularly useful for mobile content designers: viewing page source code, document syntax validation and highlighting, tolerance to syntax errors, viewing entities as characters, logging of the HTTP traffic, modification of HTTP headers, direct access to the HTTP query, modification of POST requests, viewing WML context variables, control over WML events. The HTTP request sent by this WAP emulator is similar to a real mobile browser request, so WAP Proof can be used for the development of resources being sensitive to the user-agent. Several mobile devices (Alcatel, Motorola, Nokia, Sagem, Samsung, Siemens, Sony Ericsson) are emulated, so you can test your mobile site on several handsets. Additional HTTP attributes, for instance, the attribute containing MSISDN, may be easily added to the request.