Classification
Unicode properties assigned to this character by the Unicode Consortium. The codepoint is its unique numeric identifier. Category, block, and script determine how text systems render and process it.
- Codepoint
- U+0004
- Decimal
- 4
- Plane
- BMP — Basic Multilingual Plane
- Category
- Control (Cc)
- Block
- Basic Latin
- Script
- Common
- Bidi class
- BN Boundary Neutral
- East Asian Width
- N Narrow
Encodings & Escape Sequences
Every Unicode character can be represented in multiple ways depending on context. HTML entities let you embed it safely in web pages. UTF-8 bytes are what gets stored on disk and sent over the network. Escape sequences let you reference it in source code without pasting the raw glyph. All formats below refer to the same character — <control>.
Click the copy icon to copy any value.
| Format | Value | |
|---|---|---|
| HTML Decimal |

|
|
| HTML Hex |

|
|
| UTF-8 Hex Bytes |
04
|
|
| UTF-16 Hex Bytes |
00 04
|
|
| UTF-32 Hex |
00000004
|
|
| CSS Escape |
\4
|
|
| JavaScript Escape |
\u0004
|
|
| Python Escape |
\u0004
|
|
| URL Encoded |
%04
|