Regex Tester & Validator

Matches 7-digit numeric sequences split into groups of 2, 3, and 2 digits, where each separator is optional and can be a dot or whitespace, followed by a newline. Intended for finding Brazilian CEP postal codes (e.g., '12.345 67') in text, though the official CEP format uses 8 digits. The global and multiline flags allow finding all occurrences across multiple lines of input.