Difftastic, the fantastic diff
I would love to use this but I can't be bothered to save the text to a file every time. I always paste into<p><a href="https://www.diffnow.com/compare-clips" rel="nofollow">https://www.diffnow.com/compare-clips</a> or 
<a href="http://incaseofstairs.com/jsdiff/" rel="nofollow">http://incaseofstairs.com/jsdiff/</a><p>Does anybody know any better alternatives which work with pasting?