Outline Text Generator
Type above and you get double-struck letters rather than outlined ones. Unicode has no outline alphabet. What everyone calls outline text is blackboard bold, drawn with a doubled stroke instead of a hollow one.
These are characters, not formatting, which is why they survive a paste into a bio. It is also why a screen reader will not read them as ordinary letters, and why some sites refuse them in a name field.
The name is wrong, and the difference is visible
An outlined letter is hollow: one contour, nothing inside. This produces double-struck, or blackboard bold, where one stroke is doubled and the rest stays solid. It came from chalk, since a blackboard cannot render bold. If you wanted genuinely hollow letters, no outline alphabet exists in Unicode; the nearest thing is the circled set on the bubble text generator.
Seven capitals are borrowed
The block is Mathematical Double-Struck: 𝔸 at U+1D538, 𝕒 at U+1D552. Seven capitals are absent from it, each having been encoded already as the name of a set of numbers.
| Letter | Character | Codepoint | Encoded first as |
|---|---|---|---|
| C | โ | U+2102 | complex |
| H | โ | U+210D | quaternions |
| N | โ | U+2115 | naturals |
| P | โ | U+2119 | primes |
| Q | โ | U+211A | rationals |
| R | โ | U+211D | reals |
| Z | โค | U+2124 | integers |
Those seven are drawn by a different part of the font from the other nineteen capitals, so they can sit at a slightly different weight. A generator that simply adds an offset to the letter code emits unassigned characters for all seven and produces empty boxes.
It does have digits
Unlike fraktur and circled letters, double-struck has digits too, 𝟘 to 𝟡 starting at U+1D7D8, so a year styles with the words. Accents, punctuation and spaces pass through unchanged.
Honest limits
- A screen reader announces MATHEMATICAL DOUBLE-STRUCK CAPITAL A, so a styled word is read out as a string of descriptions. Decoration only.
- Normalization folds 𝕒 to a and โ to R, so a field that tidies input keeps the plain word.
- They sit above U+FFFF, where support is thinner than in the older blocks behind the circled and fullwidth styles on the fancy text generator.
- They cannot be searched as ordinary text, and some sites reject them in a name field.