Tool for creating, testing, and learning about Regular Expressions
...Replace & List output custom results. Details lists capture groups. Explain describes your expression in plain English. It provides full RegEx Reference with help & examples. Undo & Redo with ctrl-Z / Y in editors. Search for & rate Community Patterns. You can also group multiple tokens together and create a capture group for extracting a substring or using a backreference.
A stand-alone editor using Mediawiki markup language to generate HTML code. You can create and preview pages written using Mediawiki markup (i.e. Wikipedia pages) while off-line.