What is the difference between Mathematical Bold Small X and Latin Small Letter X?

Mathematical Bold Small X is U+1D431 in the Mathematical Alphanumeric Symbols block. Latin Small Letter X is U+0078 in the Basic Latin block. They are distinct Unicode codepoints and may appear visually similar depending on the font.

What is the HTML entity for Mathematical Bold Small X?

The HTML entity for Mathematical Bold Small X (U+1D431) is 𝐱.

What is the HTML entity for Latin Small Letter X?

The HTML entity for Latin Small Letter X (U+0078) is x.

Are Mathematical Bold Small X and Latin Small Letter X the same Unicode character?

No. Mathematical Bold Small X is U+1D431 (decimal 119857) and Latin Small Letter X is U+0078 (decimal 120). They are separate codepoints.

What are the UTF-8 encodings of Mathematical Bold Small X and Latin Small Letter X?

Mathematical Bold Small X (U+1D431) encodes as F0 9D 90 B1 in UTF-8. Latin Small Letter X (U+0078) encodes as 78 in UTF-8.

Mathematical Bold Small X vs Latin Small Letter X

Compare two Unicode characters side by side — encodings, HTML entities, escape sequences, and Unicode properties. Useful for distinguishing visually similar characters like hyphens and dashes, quotation marks, or homoglyphs.

𝐱

Mathematical Bold Small X

U+1D431

Full details →

Latin Small Letter X

U+0078

Full details →

Property Comparison

Property	Mathematical Bold Small X	Latin Small Letter X
Codepoint	`U+1D431`	`U+0078`
Decimal	`119857`	`120`
HTML Entity	`𝐱`	`x`
HTML Decimal	`𝐱`	`x`
HTML Hex	`𝐱`	`x`
UTF-8	`F0 9D 90 B1`	`78`
UTF-16	`D8 35 DC 31`	`00 78`
UTF-32	`0001D431`	`00000078`
CSS Escape	`\1D431`	`\78`
JS Escape	`\uD835\uDC31`	`\u0078`
Python Escape	`\U0001D431`	`\u0078`
URL Encoded	`%F0%9D%90%B1`	`x`
Category	`Lowercase Letter (Ll)`	`Lowercase Letter (Ll)`
Block	`Mathematical Alphanumeric Symbols`	`Basic Latin`
Script	`Common`	`Latin`
Bidi Class	`L`	`L`
Unicode Version	`3.1`	`1.1`

Rows highlighted in amber differ between the two characters.

Common Comparisons

Frequently confused character pairs.

Em Dash vs En Dash 2014 / 2013 Hyphen-Minus vs Minus Sign 002D / 2212 Copyright vs Sound Recording Copyright 00A9 / 2117 Latin A vs Greek Alpha 0041 / 0391 Degree Sign vs Masculine Ordinal 00B0 / 00BA Left vs Right Single Quotation Mark 2018 / 2019 Left vs Right Double Quotation Mark 201C / 201D Multiplication Sign vs Letter x 00D7 / 0078 Right Quotation Mark vs Apostrophe 2019 / 0027 Horizontal Ellipsis vs Three Dots 2026 / 0020