strfriend - visualize regular expressions simply

strfriend - visualize regular expressions simply
example: /((?:\((?:\([^()]+\)|[^()]+)+\)|\[(?:\[[^[\]]+\]|[^[\]]+)+\]|\\.|[^ >+~,(\[]+)+|[>+~])(\s*,\s*)?/g - from sizzle

tag: regular expression regexp