Regex Character Class Builder ([abc], [a-z], [^...])

Character classes ([abc], [a-z], [^xyz]) are the most flexible regex feature and the easiest to get wrong (especially escaping). This builder lets you check boxes — digits, letters, specific chars, ranges — and outputs the correct character class syntax.

How to use the Regex Character Class Builder ([abc], [a-z], [^...])

Toggle the common classes, add custom chars or ranges, and the regex output updates live. Optional negation wraps the class with ^.