舊的瀏覽器可能不支持所有在下面的表中的HTML5實體。
Chrome提供了良好的支持。 但(currently)只有IE 11+和35+的Firefox支持所有的實體。
| 字符 | 實體名稱 | 十六進制 |
|---|---|---|
| Ú | Uacute | 000DA |
| ú | uacute | 000FA |
| ↟ | Uarr | 0219F |
| ⇑ | uArr | 021D1 |
| ↑ | uarr | 02191 |
| ⥉ | Uarrocir | 02949 |
| Ў | Ubrcy | 0040E |
| ў | ubrcy | 0045E |
| Ŭ | Ubreve | 0016C |
| ŭ | ubreve | 0016D |
| Û | Ucirc | 000DB |
| û | ucirc | 000FB |
| У | Ucy | 00423 |
| у | ucy | 00443 |
| ⇅ | udarr | 021C5 |
| Ű | Udblac | 00170 |
| ű | udblac | 00171 |
| ⥮ | udhar | 0296E |
| ⥾ | ufisht | 0297E |
| 𝔘 | Ufr | 1D518 |
| 𝔲 | ufr | 1D532 |
| Ù | Ugrave | 000D9 |
| ù | ugrave | 000F9 |
| ⥣ | uHar | 02963 |
| ↿ | uharl | 021BF |
| ↾ | uharr | 021BE |
| ▀ | uhblk | 02580 |
| ⌜ | ulcorn | 0231C |
| ⌜ | ulcorner | 0231C |
| ⌏ | ulcrop | 0230F |
| ◸ | ultri | 025F8 |
| Ū | Umacr | 0016A |
| ū | umacr | 0016B |
| ¨ | uml | 000A8 |
| _ | UnderBar | 0005F |
| ⏟ | UnderBrace | 023DF |
| ⎵ | UnderBracket | 023B5 |
| ⏝ | UnderParenthesis | 023DD |
| ⋃ | Union | 022C3 |
| ⊎ | UnionPlus | 0228E |
| Ų | Uogon | 00172 |
| ų | uogon | 00173 |
| 𝕌 | Uopf | 1D54C |
| 𝕦 | uopf | 1D566 |
| ↑ | UpArrow | 02191 |
| ⇑ | Uparrow | 021D1 |
| ↑ | uparrow | 02191 |
| ⤒ | UpArrowBar | 02912 |
| ⇅ | UpArrowDownArrow | 021C5 |
| ↕ | UpDownArrow | 02195 |
| ⇕ | Updownarrow | 021D5 |
| ↕ | updownarrow | 02195 |
| ⥮ | UpEquilibrium | 0296E |
| ↿ | upharpoonleft | 021BF |
| ↾ | upharpoonright | 021BE |
| ⊎ | uplus | 0228E |
| ↖ | UpperLeftArrow | 02196 |
| ↗ | UpperRightArrow | 02197 |
| ϒ | Upsi | 003D2 |
| υ | upsi | 003C5 |
| ϒ | upsih | 003D2 |
| Υ | Upsilon | 003A5 |
| υ | upsilon | 003C5 |
| ⊥ | UpTee | 022A5 |
| ↥ | UpTeeArrow | 021A5 |
| ⇈ | upuparrows | 021C8 |
| ⌝ | urcorn | 0231D |
| ⌝ | urcorner | 0231D |
| ⌎ | urcrop | 0230E |
| Ů | Uring | 0016E |
| ů | uring | 0016F |
| ◹ | urtri | 025F9 |
| 𝒰 | Uscr | 1D4B0 |
| 𝓊 | uscr | 1D4CA |
| ⋰ | utdot | 022F0 |
| Ũ | Utilde | 00168 |
| ũ | utilde | 00169 |
| ▵ | utri | 025B5 |
| ▴ | utrif | 025B4 |
| ⇈ | uuarr | 021C8 |
| Ü | Uuml | 000DC |
| ü | uuml | 000FC |
| ⦧ | uwangle | 029A7 |