Type normal plain text on the left and watch it instantly transform into 350+ cool font styles on the right.
There is no convert button because there is nothing to submit. Every result row is re-computed on each keystroke from the text in the box, in your browser, against the 358 lookup tables. That is fast enough to feel instant because each conversion is a character-by-character map with no network round trip. It also means you can edit the plain text and watch a specific styled row change, which is the quickest way to check how a particular word looks in a particular style, type the word, find the row, adjust the word.
Only A to Z, a to z and sometimes 0 to 9 are converted, because those are the only characters the fancy alphabets define. Spaces stay spaces. Punctuation passes through unchanged in every style except the enclosed ones, which have a few punctuation marks, and the fullwidth style, which has fullwidth punctuation. Accented letters, emoji and non-Latin scripts pass through untouched, a Spanish ñ or a Hindi word will sit in the middle of a styled English phrase in its normal form. That is by design; substituting a wrong look-alike would be worse than leaving it plain.
Conversion happens on every keystroke, in your browser. The result rows are always showing the current text in the box, so there is nothing to submit.
The fancy alphabets only define unaccented A to Z. An é, ü or ñ has no styled counterpart, so it passes through unchanged rather than being replaced with something that reads wrong.
No. The lookup tables are in the page and the conversion runs locally. Nothing you type leaves the browser.