Roman Numeral Font Generator

For text that people will search, quote or read with a screen reader, use plain capitals: XII is three ordinary letters that any device, search engine and spell checker understands.

The numeral characters (Ⅻ, ⅻ) come from the Number Forms block. Unicode added them for compatibility with East Asian standards and says that, for most purposes, it is better to write Roman numerals with ordinary Latin letters (source: unicode.org). They are worth it when one numeral has to fit in one fixed-width cell, or in vertical text, where they stay upright while Latin letters turn sideways.

A search for XII may not find Ⅻ (U+216B), and the other way round. If the numeral is the reason someone will find your page, keep it in plain letters.

These are not fonts. Each one is a different character taken from the Mathematical Alphanumeric Symbols block, where 𝐌 is a symbol of its own and not a bold M. The Unicode Standard says these characters are not to be used for nonmathematical styled text (source: unicode.org).

In practice that means: a screen reader may read them as math symbols or skip them, search engines may not match them to the letter, and copying into a form that only accepts letters can fail. They are fine for a decorative name or a social media bio that you accept may not be read out loud.

It depends on the fonts of the device that displays the text. When a font has no glyph for a character, the system shows it in another font or as an empty box. Plain capitals work on every device; for every other style there is no guarantee.

Before you publish, paste the text into the app you will use and check it on another phone.

From 4,000 on, Roman numerals use a bar (vinculum) that multiplies the letters under it by 1,000: I̅V̅ is 4,000 and M̅ is 1,000,000. The generator writes the bar with the combining overline character (U+0305) after each letter, so it can be copied as text. Not every font draws it in the right place; in a design, the preview below shows how it looks.