Regex Tester & Validator

Matches username:password pairs, where the username consists of one or more alphanumeric characters, dots, or @ symbols (typical email-style usernames), followed by a literal colon and a password of one or more characters in the ASCII range 0-z. Note that 0-z includes digits, letters, and symbols like : ; < = > ? @ and backslash. Commonly used to extract credential pairs from logs, config files, or text dumps, such as HTTP Basic Auth or leaked credential lists.