I've tried a number of these and this is the one I've gotten along with best: http://jsregex.com/ http://jsregex.com/ Simple, minimalist, takes up all availab

I've tried a number of these and this is the one I've gotten along with best: http://jsregex.com/ http://jsregex.com/ Simple, minimalist, takes up all available space in the viewport & also works offline if you save the page.