Why fancy fonts break into □ boxes (and how I fixed it)

I kept pasting "fancy fonts" into my Discord name only to see □ □ □ boxes on my friend's Android phone. Turns out most generators use combining-mark characters that don't render everywhere.

So I built FontPaste — it only ships 26 Unicode styles I tested across iOS, Android, and Discord. No ads, no signup, one-click copy.

https://fontpaste.net

Would love feedback on which fonts to add next.