MockJSON is a plugin for jQuery that can hijack JSON and JSONP requests and respond with randomly generated JSON data. Completely random JSON would be pretty useless of course, so you can specify a JSON
template
for each request. On the right you see an example of such a template and some generated output.
Demo: http://experiments.mennovanslooten.nl/2010/mockjson/tryit.html
Download Links
http://experiments.mennovanslooten.nl/2010/mockjson/