What is a Unicode block?

A Unicode block is a contiguous, named range of code points reserved for a related set of characters, such as Basic Latin, Cyrillic or Emoticons. Blocks group characters by script or purpose and never overlap.

What does U+ notation mean?

U+ is the standard prefix for a Unicode code point written in hexadecimal, padded to at least four digits. For example U+0041 is the letter A and U+20AC is the euro sign.

Why do some characters show as empty boxes?

A glyph only renders if a font on your device covers that code point. Missing coverage shows the browser fallback box. The U+ value and entity are still correct even when no glyph appears.

How do I get the HTML entity for a character?

Search for the code point and read the HTML entity row. It uses the numeric form &#decimal; which works in any HTML document regardless of named-entity support.

Does the browser handle characters above U+FFFF?

Yes. Code points such as emoji live in the supplementary planes above U+FFFF and are rendered with String.fromCodePoint, which correctly produces the surrogate pair under the hood.

Unicode Block Browser

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Explore the Unicode character space

Unicode assigns every character a unique number called a code point, written in hexadecimal with a U+ prefix. Code points are organised into named blocks like Basic Latin, Greek, Currency Symbols and Emoticons. This browser lets you scan a whole block as a grid of glyphs, or jump straight to a single code point by its hex value to read its decimal number, HTML entity and owning block.

How it works

When you pick a block, the tool iterates from its start code point to its end and renders each one with String.fromCodePoint(cp). The U+ label is produced by converting the code point to base 16 and zero-padding to four digits. The hex search parses your input after stripping an optional U+ or 0x prefix, then finds which block contains it by checking each block’s inclusive start and end boundaries. The HTML entity shown is the numeric form &#decimal;, which is universally supported.

Notes and examples

The euro sign is U+20AC, decimal 8364, entity €, in the Currency Symbols block.
Emoji such as the grinning face U+1F600 live in supplementary planes above U+FFFF and are stored internally as surrogate pairs.
Surrogate code points U+D800-U+DFFF are reserved for that pairing mechanism and are never valid characters on their own, so they are skipped.
Glyph rendering depends entirely on the fonts installed on your device; the numbers and entities are always accurate even when a box appears.