HTML Entity for Uppercase U Horn (Ư)

Beginner

5 min read

Updated: Sep 2026

1 example

Unicode U+01AF

HTML Entity for uppercase U horn (U+01AF) tutorial illustration

Definition

What Is Uppercase U Horn?

Uppercase U horn (Ư) is the Unicode character at U+01AF in Latin Extended-B. Official name: LATIN CAPITAL LETTER U WITH HORN — a capital U with a horn (móc) on the right, used especially in Vietnamese.

Remember

Character     Ư
Unicode       U+01AF
Named entity  &Uhorn;  (capital U)
Hex entity    &#x1AF;
Decimal       &#431;
CSS escape    \01AF
Not the same  ư · Ơ · U

Prefer &Uhorn; in HTML markup — the capital U in the name matters. Numeric forms and typing Ư in UTF-8 also work. For the lowercase letter, use &uhorn; (ư).

Reference

Quick Reference

One table for every form you will actually use.

Form	Code	Where it goes
Named entity	`&Uhorn;`	HTML markup (preferred)
Direct character	`Ư`	HTML text (UTF-8)
Hex entity	`Ư`	HTML markup
Decimal entity	`Ư`	HTML markup
CSS escape	`\01AF`	Stylesheet `content`
Lowercase (related)	ư (U+01B0)	Named `&uhorn;`

When to Use Which

Situation	Use
Capital U with horn (Ư)	`&Uhorn;` or type `Ư`
Lowercase u with horn (ư)	ư (`&uhorn;`)
Capital O with horn (Ơ)	Ơ (`&Ohorn;`)
Capital U with grave (Ù)	Ù (`Ù`)
Plain capital U	U (U+0055)
Generated text via `::before` / `::after`	`content: "\01AF"`

See it

Live Preview

Uppercase U horn rendered alone and next to related letters.

Large glyph Ư

Notation THƯ

Compared Ư | ư | Ơ

Hint Compare: Horn Ư | Lower ư | O horn Ơ | Plain U

With entities Named: &Uhorn; | Hex: Ư | Decimal: Ư

Code

Complete HTML Example

One page that shows the letter with named, hex, decimal, CSS escape, and a typed character. Use View Output or open the live editor.

Named + Hex + Decimal + CSS + Typed

Five ways to produce Ư, plus a short Vietnamese example.

html

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <title>Uppercase U Horn (Ư)</title>
  <style>
    #point::after {
      content: "\01AF";
    }
  </style>
</head>
<body>
  <p>Using Named Entity: &Uhorn;</p>
  <p>Using Hex Code: &#x1AF;</p>
  <p>Using HTML Code: &#431;</p>
  <p id="point">Using CSS Entity: </p>
  <p>Typed directly: Ư</p>
  <p lang="vi">Word: TH&Uhorn;</p>
</body>
</html>

Try It Yourself

How It Works

1. Named: &Uhorn; (capital U) is the clearest HTML form for U+01AF. Lowercase &uhorn; is a different character (ư).

2. Hex: U+01AF → Ư in HTML. Same glyph as the named entity.

3. Decimal: same code point as 431 → Ư. Same glyph as hex and named.

4. CSS: use \01AF in content (not an HTML entity). #point::after appends that Ư after the paragraph text.

5. Typed / word: paste Ư in UTF-8, or build Vietnamese text like TH&Uhorn; with lang="vi".

Pitfalls & Tips

Common mistakes when working with U+01AF.

Case

&Uhorn; ≠ &uhorn;

&Uhorn; → Ư (capital). &uhorn; → ư (lowercase). Entity names are case-sensitive.

vs Ơ

Not O with horn

Ơ (&Ohorn;) is O with horn. Ư is U with horn — both appear in Vietnamese, but they are different letters.

vs U

Not plain capital U

Keyboard U is U+0055. Use U+01AF when Vietnamese orthography needs the horned form.

Encoding

Keep UTF-8 declared

Latin Extended-B letters display reliably with <meta charset="UTF-8">. Prefer named entities when the source file encoding is uncertain.

CSS vs HTML

Do not mix escapes

\01AF belongs in CSS strings. &Uhorn; / Ư / Ư belong in HTML.

A11y

Use real language context

When Ư appears in Vietnamese words, keep surrounding text and lang="vi" so screen readers get useful context.

Compatibility

Browser Support

Uppercase U horn (U+01AF) and its entity forms (&Uhorn;, Ư, Ư, CSS \\01AF) are supported in all mainstream browsers. Visible glyphs depend on Latin Extended-B font coverage.

✓ Universal support

Uppercase U Horn (Ư)

Encode with named, hex, decimal, CSS escape, or type the character — same code point everywhere encoding is supported.

100% Browser coverage

Google Chrome Supported

Yes

Microsoft Edge Supported

Yes

Mozilla Firefox Supported

Yes

Apple Safari Supported

Yes

Opera Supported

Yes

Internet Explorer IE 9+

Yes

U+01AF / &Uhorn; Full support

Bottom line: Prefer &Uhorn; (capital U) in HTML. Use \\01AF only inside CSS content. Do not confuse with &uhorn; (ư), O horn Ơ, or plain U.

Remember

Key Takeaways

Unicode: uppercase U horn is U+01AF (decimal 431) — glyph Ư.
HTML: prefer &Uhorn; (capital U) — also Ư / Ư.
CSS: use \01AF inside content for generated text.
Meaning: Ư is capital U horn — not ư (&uhorn;), not Ơ (O horn), not plain U.

One line: U+01AF → &Uhorn; / Ư / Ư / CSS \01AF.

Frequently Asked Questions

How do I display Ư in HTML?

Use &Uhorn; (named), Ư (hex), Ư (decimal), type Ư directly in UTF-8, or the CSS escape \01AF in content. Prefer &Uhorn; in normal HTML.

What is the Unicode value for uppercase U horn?

U+01AF (LATIN CAPITAL LETTER U WITH HORN). Hex 1AF, decimal 431. It belongs to Latin Extended-B (U+0180–U+024F).

Is there a named HTML entity for U+01AF?

Yes. Use &Uhorn; (capital U). Numeric forms Ư and Ư also work. Note: &uhorn; (lowercase) is a different letter (ư).

Is Ư the same as ư or Ơ?

No. Ư is U+01AF (&Uhorn;, capital horn). ư is U+01B0 (&uhorn;). Ơ is U+01A0 (&Ohorn;, O with horn).

When should I use &Uhorn;?

Use it for Vietnamese and other orthographies that need Ư — not as a substitute for Ơ or plain U.

What is the difference between HTML code and CSS entity for U+01AF?

HTML entities (&Uhorn;, Ư, or Ư) go in markup. The CSS escape \01AF goes in stylesheet strings (usually content on ::before/::after).

Did you know?

Uppercase U horn is Unicode U+01AF (decimal 431) — glyph Ư in Latin Extended-B (U+0180–U+024F). HTML5 names it &Uhorn; (capital U). Official name: LATIN CAPITAL LETTER U WITH HORN. Lowercase is &uhorn; (ư, U+01B0). Essential in Vietnamese orthography. Do not confuse with O horn Ơ (&Ohorn;) or plain U.

Next: Uppercase U Inverted Breve

Learn the HTML entity for uppercase U with inverted breve (U+0216).

Continue tutorial →

About the author

Mari Selvan M P 🔗

Developer, cloud engineer, and technical writer

Experience 12 years building web and cloud systems
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I write practical tutorials so students and working developers can learn by doing—from databases and APIs to deployment on AWS.

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