

RegExr is a Flex application that uses ActionScript’s built-in regular expression engine to generate expressions on the fly with its intuitive interface that allows you to —
- Learn about a regex entry by simply selecting it.
- Build custom regular expressions from the available samples which are neatly categorized.
- Test an expression or actually modify a piece of text by replacing part(s) of text right inside the tool.
- Save your expressions which can be later retrieved from My Saved panel.
- Share an expression by generating a URL on the fly.
- Explore and use the expressions shared by other users from the community.
To read more about it, you can visit RegExr about page.