css/js online online code editor/formator/debuger

 

http://cssdeck.com/labs

http://jsfiddle.net/

 

http://fiddle.jshell.net/  support console

 

http://plnkr.co/edit/

 

 

http://codepen.io/Topcoat/pen/kdKyg

 

 

http://jsbin.com/?html,output

 

http://www.cssportal.com/online-css-editor/

 

 

CSS Beautify

http://codebeautify.org/css-beautify-minify