Roman Numerals
Convert an integer (1-3999) to Roman numerals, or a Roman numeral back to a number. In your browser.
Runs in your browser — your file never leaves your deviceFrequently asked questions
Is Roman Numerals free to use?
Yes — Roman Numerals is completely free with no limits, no watermarks and no sign-up. It runs in your browser, so there is nothing to pay for.
Are my files uploaded or stored anywhere?
No. This tool does all its work locally in your browser using your own device's power. Your files never leave your device and we never see them.
Do I need to install anything or create an account?
No installation and no account needed. Roman Numerals works on any modern browser — Windows, Mac, Linux, Android and iPhone.
How do I use Roman Numerals?
Open the tool, add your file (or paste your content), adjust any options, then press “Convert numerals”. Your result is ready to download in seconds.