Regex Editor & Tester

This regex matches a literal prefix 'string@' followed by one or more characters, each of which is either a Unicode Latin letter (from À to ž, covering Latin-1 Supplement and Latin Extended-A) or a backslash followed by exactly three digits (e.g., \123). The 'u' flag makes it Unicode-aware, while 'g' allows global matching. It is useful for parsing or validating custom identifiers or tokens that support escaped numeric character codes, such as encoded string literals or configuration keys.