Regex Tester & Validator

This regex matches a hexadecimal number followed by the letter 'h' (e.g., 0FFh, 1A3Fh) that is preceded by a whitespace character. It is commonly used in assembly language or technical documentation to identify hex constants with a suffix. The 'h' suffix distinguishes hex values from decimal or other bases. The pattern captures the entire hex literal including the suffix for further processing.