UnicodeCharactercom
BOM
U+FEFF · ZERO WIDTH NO-BREAK SPACE

Zero Width No-Break Space

  • CodepointU+FEFF
  • NameZERO WIDTH NO-BREAK SPACE
  • Decimal65279
  • BlockArabic Presentation Forms-B (U+FE70–U+FEFF)
  • Plane0 — Basic Multilingual Plane
  • ScriptCommon
  • CategoryCf — Format
  • Unicode version1.1 (1993)
  • Bidi classBN — Boundary Neutral
  • Combining class0
  • East Asian widthN — Neutral
  • MirroredNo

About this character

U+FEFF is ZERO WIDTH NO-BREAK SPACE, an invisible format character in the Arabic Presentation Forms-B block. Its script is Common: it is shared by many writing systems rather than belonging to one. It was added in Unicode 1.1 (1993).

It is invisible. It changes how surrounding text is processed or displayed but has no glyph of its own, which makes it easy to paste by accident.

It is a default-ignorable codepoint: when a font or renderer does not support it, it should be displayed as nothing at all rather than as a missing-glyph box.

It also has the formal alias BYTE ORDER MARK.

Common abbreviation: BOM, ZWNBSP.

How to type it

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Encodings & escapes

UTF-8 encoder →
UTF-8EF BB BF3 bytes
UTF-16FEFF1 code unit
UTF-320000FEFF4 bytes
HTML decimal
HTML hex
CSS\FEFFin content: "…"
JavaScript\uFEFF
JSON\uFEFF
Python\uFEFF
Python\N{ZERO WIDTH NO-BREAK SPACE}by name
Java / C#\uFEFF
C / C++\uFEFFuniversal character name
Rust / Swift / PHP\u{FEFF}
Go\uFEFF
Ruby\uFEFF
Excel / Sheets=UNICHAR(65279)
URL-encoded%EF%BB%BFpercent-encoded UTF-8