Roman Numeral Translator

This tool performs bidirectional numeral translation between Roman numerals and decimal numbers. It targets students, educators, developers, and researchers who require fast, reliable conversions with validation. The system enforces canonical symbols (I, V, X, L, C, D, M) and standard subtractive rules, delivering deterministic outputs for valid inputs. It also documents errors for invalid sequences, guiding users toward correct values. The underlying logic supports typical educational use cases, coding data preparation, and quick historical reference checks. Core strengths include clear, rule-consistent translations, predictable handling of edge cases, and robust input validation to prevent misinterpretation of non-numeric strings. The tool can be extended with higher ranges or variants if needed, but these are off by default to preserve canonical behavior. Users benefit from immediate, trustworthy results without ambiguity, making it suitable for exam prep, classroom activities, and software data processing where numerals must be converted precisely.