Turn words into hollow, outlined letters. Includes outline numbers and framed name styles.
Bold letters are hard to draw with chalk, so math teachers started doubling one stroke of each letter instead. Mathematicians call the result blackboard bold, and it's the style a double struck text generator produces. The look stuck. Today ℝ means the real numbers, ℕ the natural numbers, ℚ the rationals (from "quotient") and ℤ the integers, from the German word Zahlen.
Unicode added a full set of these letters for math, which means you can paste them anywhere text goes: names, bios, headers and comments.
Numbers come out hollow too: 𝟘𝟙𝟚𝟛𝟜𝟝𝟞𝟟𝟠𝟡. That's handy for a year, a jersey number or a level tag.
If you look closely at ℂ, ℍ, ℕ, ℙ, ℚ, ℝ and ℤ, they can look a little heavier or lighter than the rest. These capitals were added to Unicode years earlier, in the Letterlike Symbols block, because mathematicians needed them first. When the full alphabet arrived, those seven were left where they were. So your phone may draw them from a different font than the other letters.
It's normal and nothing is broken. If a name relies heavily on those letters and the mismatch bothers you, try the lowercase version.
For solid weight instead of outlines, use the bold text generator. Circled letters are on the bubble text generator, and edgier gaming tags on the gothic font generator.