What's New?
Welcome to Regex Storm

Regex Storm is a free online tool for building and testing regular expressions on the .NET regex engine, featuring an ajax-powered .NET regex tester and a complete .NET regex reference with quick search.

Regex Tester
Test regular expressions using the full-featured tester that finds matches as you type.
Regex Reference
A complete, searchable reference for all regex elements and constructs, with live examples.
The purpose behind Regex Storm, key features, credits, all that good stuff.
Dev Blog
Take a look at what's going on behind the scenes at Regex Storm.