Uppercase U (U) is the Basic Latin character at Unicode U+0055 (LATIN CAPITAL LETTER U). You can type U directly in HTML, or write it with a numeric character reference when you need an explicit entity form.
Remember
Character U
Unicode U+0055
Hex entity U
Decimal U
CSS escape \0055
Named entity (none)
Official name LATIN CAPITAL LETTER U
Using Hex Code: U
Using HTML Code: U
Using Direct Character: U
Using CSS Entity: U
The letter U follows T in the alphabet.
How It Works
1. Hex / decimal:U+0055 → U or U in HTML.
2. Direct: typing U in a UTF-8 file is the simplest and preferred approach.
3. CSS: use \0055 in content (not an HTML entity). The four-digit form avoids ambiguity with following hex digits.
4. Sentence: shows ordinary text use — no entity required for everyday letters.
Pitfalls & Tips
Common mistakes when working with this character.
Prefer
Type U in body text
ASCII letters do not need entities for normal reading. Prefer typing U directly.
Named?
No named entity
HTML5 does not define a named entity for U+0055. Use numeric forms when an entity is required.
Look-alikes
Not U acute
Ordinary U is U+0055. Ú (U+00DA) is a different letter with an acute accent.
Case
Use the correct case
Lowercase is u (U+0075). Do not mix case when casing matters for identifiers or display.
CSS
Pad the CSS escape
Use \0055 (not bare \55) so a following digit is not absorbed into the escape.
Semicolon
End references
Always finish with ; — write U, not U.
Compatibility
Browser Support
Uppercase U / LATIN CAPITAL LETTER U (U+0055) and its numeric entity forms (U, U, CSS \\0055) are supported in all mainstream browsers as a core ASCII letter.
✓ Universal support
Uppercase U
Prefer typing U in UTF-8 HTML. Use hex, decimal, or CSS escape when you need an explicit form.
100%Browser coverage
Google ChromeSupported
Yes
Microsoft EdgeSupported
Yes
Mozilla FirefoxSupported
Yes
Apple SafariSupported
Yes
OperaSupported
Yes
Internet ExplorerAll versions
Yes
U+0055 / entitiesFull support
Bottom line: Prefer typing U in body text. Use U / U when you need an entity, and \\0055 only inside CSS content.
Remember
Key Takeaways
Unicode: this character is U+0055 (decimal 85) — LATIN CAPITAL LETTER U.
HTML: prefer typing U, or use U / U.
CSS: use \0055 inside content for generated text.
Watch out: no named entity; U+0055 ≠ U+00DA (U acute).
One line:U+0055 → type U / U / U / CSS \0055.
Frequently Asked Questions
Type U directly in UTF-8 HTML, or use U (hex), U (decimal), or the CSS escape \0055 in the content property. All render U+0055.
U+0055 (hex 55, decimal 85). Unicode names it LATIN CAPITAL LETTER U. It belongs to Basic Latin (ASCII) and is the twenty-first letter of the English alphabet.
No. ASCII letters like U do not have named HTML entities in HTML5. Use numeric references like U or U when you need an entity form.
For normal body text, type U directly. Use entities when generating content in CSS, when you want explicit encoding, or when escaping is required.
U+0055 is ordinary capital U. U+00DA is LATIN CAPITAL LETTER U WITH ACUTE (Ú). U+0075 is lowercase u. They are different characters.
HTML entities (U or U) go in markup. The CSS escape \0055 is used in stylesheets (usually in the content property of ::before/::after). Both render the same glyph.
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Did you know?
Uppercase U is Unicode U+0055 (decimal 85) — official name LATIN CAPITAL LETTER U in Basic Latin (ASCII). HTML5 has no named entity for it — typing U directly is usually best.
