Visually build regex character classes [...], test matches in real-time.
RegexExpressioncharacterclassisuse Brackets[...]enclosed character set, matching anyBracketsany one character in the set. For example[abc]matches a, b, orcany one in the set. [a-z] matches anyLowercase。[^0-9]matches non-Digitscharacter。Character classes are one of the most commonly used regex constructs。
Free online regex character class generator. Visually build regex character classes [...]. Supports Unicode ranges, predefined classes, negation classes [^...], and live match testing. Pure frontend, privacy-protected. Try now!
In character classes, hyphens represent ranges, like [a-z] for all characters from a to z. To match a literal hyphen, place it at the start or end like [-abc] or [abc-], or escape it with [\\-].
Free online regex character class generator. Visually build regex character classes [...]. Supports Unicode ranges, predefined classes, negation classes [^...], and live match testing. Pure frontend, privacy-protected. Try now!
Free online regex character class generator. Visually build regex character classes [...]. Supports Unicode ranges, predefined classes, negation classes [^...], and live match testing. Pure frontend, privacy-protected. Try now!
No. All regex generation and testing is done locally in your browser. No data is uploaded to any server. Your regex patterns and test data remain entirely under your control.