Screen readers announce characters by their identity, not their appearance. Styled Unicode text is made of mathematical and symbol characters, so instead of hearing a word, a listener may hear a string of character names, individual letters, or nothing at all.
What the software is working from
A screen reader reads the underlying characters and consults its pronunciation rules. For ordinary letters it assembles words. For U+1D400 MATHEMATICAL BOLD CAPITAL A there is no word to assemble — it is a mathematical symbol that happens to be shaped like a letter. Behaviour then depends entirely on the screen reader's own handling.
What listeners actually get
Outcomes vary by software and settings. Some announce each character by its Unicode name, so a five-letter styled name becomes a long recitation. Some spell it out letter by letter without word boundaries. Some skip unrecognised characters silently, which means a styled bio can simply be absent. None of these is the reading experience you intended.
The cases that cause real harm
Decoration is a minor annoyance. The damage is done when essential information exists only in styled form: a business name, contact details, opening hours, a link description, an instruction, a warning. If the only copy of that information is decorative Unicode, some people cannot access it at all.
Combining marks are the worst case
Glitch text stacks many combining marks per character. A screen reader may attempt to announce every one, turning a short phrase into minutes of output, or may fail in ways that make navigation difficult. Avoid combining marks anywhere they could be encountered by assistive technology.
A workable compromise
Keep one plain-text copy of anything that carries meaning. Style the display name if you like, but put the searchable, readable version in the bio. Never style links, contact details or calls to action. The test is simple: if the styled characters were deleted entirely, would the remaining text still tell someone what they need to know?
This is not an argument against styled text
Decorative Unicode has a legitimate place. The point is to use it as an accent on top of accessible content rather than as a replacement for it — the same reasoning that says an image needs alternative text, not that images are forbidden.
References
Related tools and guides
Last updated September 2026 · Editorial policy · How we verify Unicode claims