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BOM
U+FEFF BOM

ZERO WIDTH NO-BREAK SPACE

Zero-width format control character governing layout and script joining.

Quick Facts

Unicode Name ZERO WIDTH NO-BREAK SPACE
Code Point U+FEFF
Decimal Value 65279
General Category Format (Cf) →
Unicode Block Arabic Presentation Forms-B →
Script Common →
Unicode Version Unicode 1.1 →
Unicode Plane Basic Multilingual Plane (BMP)

Byte Encodings

UTF-8 3 bytes EF BB BF
UTF-16 Code Unit FEFF
UTF-32 4 bytes 0000FEFF
UTF-16BE / LE Byte Order
BE: FE FF LE: FF FE
UTF-32BE / LE Byte Order
BE: 00 00 FE FF LE: FF FE 00 00

Developer Code Escapes

HTML Decimal 
HTML Hexadecimal 
HTML Named Entity None
CSS Escape \00FEFF
JavaScript (ES6) \uFEFF
JavaScript (UTF-16) \uFEFF
JSON Escape \uFEFF
Python \uFEFF
PHP "\u{FEFF}"
Java "\uFEFF"
C / C++ "\uFEFF"
Rust '\u{feff}'
URL Percent-Encoded %EF%BB%BF

Normalization & Decomposition

Combining Class 0Not Reordered (Spacing)
Decomposition None (Canonical / Precomposed Base)
NFC / NFD Forms Stable under all Unicode normalization forms (NFC, NFD, NFKC, NFKD).

Bidirectional Properties

Bidi Class BNBoundary Neutral
Bidi Mirrored No

Font Specimen & Rendering

Non-Printable Character Notice

Code point U+FEFF represents a BOM (General Category Cf). It does not produce a visible standalone glyph in standard font engines and is intended for programmatic, syntactic, layout, or lexical operations.

Names & Aliases

Official Name ZERO WIDTH NO-BREAK SPACE

The normative, immutable character identifier in the Unicode Character Database.

Identifier U+FEFF

Related Characters & Collections