Interactively Execute Javascript on Multiple Web Browsers: Tutti

Tutti is a web-based interactive Javascript console that allows you to simultaneously execute commands on multiple browsers. This is useful for debugging and discovering browser differences.

When you enter a Javascript command, it is immediately sent to each browser that’s connected to the room. Each browser then eval() the Javascript within an iframe sandbox and then send the result back not only to the originating browser, but to each browser to be displayed.