Technical information
| Symbol | | |
| Name | Zero width no-break space | |
| Unicode number | U+FEFF | |
| Category | Space symbols | |
| Description | The Unicode character , or U+FEFF, is known as "Zero Width No-Break Space" (ZWNBS). It belongs to the "Specials" block, which contains special-purpose Unicode characters. This character falls under the "Format" category. As a format control character, it typically does not render visible output and is used to influence the behavior of the surrounding text. Historically, U+FEFF was used as a "byte order mark" (BOM) at the start of a text stream, serving as a signature defining the text as Unicode and providing a hint as to its byte order (big-endian or little-endian). However, its usage as a BOM has been largely deprecated in favor of other methods for defining Unicode text and its byte order. As a "zero width no-break space", U+FEFF could theoretically be used to prevent automatic line breaks from being inserted between two characters, while not introducing any visible space between them. However, this usage is not commonly seen and is also deprecated in favor of other characters. It's worth noting that the actual impact of U+FEFF on text display and processing can depend on the specific software being used. In general, best practices suggest avoiding the use of U+FEFF where possible. |
Encoding
| HTML Entity |  | |
| HTML Entity (hex) |  | |
| URL Escape Code | %EF%BB%BF | |
| UTF-8 (hex) | 0xEF 0xBB 0xBF | |
| UTF-8 (binary) | 11101111:10111011:10111111 | |
| UTF-16 | 0xFEFF | |
| UTF-32 | 0x0000FEFF |
Source Code
| C, C++, and Java | "\uFEFF" | |
| CSS Code | \FEFF | |
| JavaScript | "\uFEFF" | |
| Perl | \x{FEFF} | |
| Python 2 | u"\uFEFF" | |
| Python 3 | \uFEFF | |
| Ruby | \u{FEFF} |
Preview
This Unicode character looks like this in sentence and in bold like this and in italic like this .
input-group
Font size:
12px
16px
20px
28px
36px
48px
72px
CSS Property: font-weight
100
200
300
400
500
600
700
800
900
HTML Forms and Input
input
disabled input
select
button
button
Code examples in HTML and CSS
<span></span>
span {
content: "\FEFF";
}The symbol in different fonts
-apple-system
Apple Color Emoji
Arial
BlinkMacSystemFont
Courier New
Georgia
Droid Sans
Helvetica
Noto Sans
Oxygen
Roboto
"Segoe UI"
sans-serif
Segoe UI Emoji
Segoe UI Symbol
system-ui
Times New Roman
Ubuntu
Verdana