Click evaluate to run your regular expression.
Regular Expressions (or regexes) are a powerful pattern matching language that are very effective for searching and replacing text.
They are an absolutely essential part of any software developer's toolkit, and even if you aren't a software developer, if you deal with text at all, they are incredibly useful. In short, you really should know them.
This page is for experimenting with and testing your regular expressions quickly and easily.
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