# U+FEFF ZERO WIDTH NO-BREAK SPACE

Invisible zero-width character known as the BOM or byte order mark, placed at file start to signal encoding and byte order; also called ZWNBSP.

| | |
|---|---|
| Codepoint | U+FEFF |
| Name | ZERO WIDTH NO-BREAK SPACE |
| Also known as | BOM, ZWNBSP, BYTE ORDER MARK |
| Block | [Arabic Presentation Forms-B](https://unicodekit.com/block/arabic-presentation-forms-b) |
| Script | Common |
| Category | Format (Cf) |
| Unicode version | 1.1 |
| HTML | `` `` |
| CSS | `\FEFF` |
| JavaScript | `\uFEFF` |
| UTF-8 | EF BB BF |
| UTF-16 | FEFF |

## Notes

- may be used to detect byte order by contrast with the noncharacter code point FFFE
- use as an indication of non-breaking is deprecated; see 2060 instead

## Related characters

- ﻼ [U+FEFC ARABIC LIGATURE LAM WITH ALEF FINAL FORM](https://unicodekit.com/char/FEFC)
- ﻻ [U+FEFB ARABIC LIGATURE LAM WITH ALEF ISOLATED FORM](https://unicodekit.com/char/FEFB)
- ﻺ [U+FEFA ARABIC LIGATURE LAM WITH ALEF WITH HAMZA BELOW FINAL FORM](https://unicodekit.com/char/FEFA)
- ﻹ [U+FEF9 ARABIC LIGATURE LAM WITH ALEF WITH HAMZA BELOW ISOLATED FORM](https://unicodekit.com/char/FEF9)
- ﻸ [U+FEF8 ARABIC LIGATURE LAM WITH ALEF WITH HAMZA ABOVE FINAL FORM](https://unicodekit.com/char/FEF8)
- ﻷ [U+FEF7 ARABIC LIGATURE LAM WITH ALEF WITH HAMZA ABOVE ISOLATED FORM](https://unicodekit.com/char/FEF7)
- ﻶ [U+FEF6 ARABIC LIGATURE LAM WITH ALEF WITH MADDA ABOVE FINAL FORM](https://unicodekit.com/char/FEF6)
- ﻵ [U+FEF5 ARABIC LIGATURE LAM WITH ALEF WITH MADDA ABOVE ISOLATED FORM](https://unicodekit.com/char/FEF5)
- ﻴ [U+FEF4 ARABIC LETTER YEH MEDIAL FORM](https://unicodekit.com/char/FEF4)
- ﻳ [U+FEF3 ARABIC LETTER YEH INITIAL FORM](https://unicodekit.com/char/FEF3)
- ﻲ [U+FEF2 ARABIC LETTER YEH FINAL FORM](https://unicodekit.com/char/FEF2)
- ﻱ [U+FEF1 ARABIC LETTER YEH ISOLATED FORM](https://unicodekit.com/char/FEF1)

Page: https://unicodekit.com/char/FEFF · JSON: https://unicodekit.com/characters/FEFF