Patterns is a simple yet powerful tool for working with regular expressions. Build great patterns quickly and effortlessly with syntax coloring and with matching and replacing occurring in real time. Regular expression syntax coloring makes it easy to see how your pattern is interpreted by the regex engine. No more confusion about what needs to be escaped. See matches and replacements in real time while you edit your pattern. Copy match and replacement code snippets of your pattern for quick use in a number of different programming languages. The built-in regular expression reference sheet helps you find the piece of regex syntax you need.