ASCII 11
Vertical Tab (VT)
Control character
Advances to the next vertical tab stop. Almost never used in modern text.
Common uses & context
Decimal 11 (0x0B) is Vertical Tab, a whitespace code.Advances to the next vertical tab stop. Almost never used in modern text.
Whitespace codes are printable in the sense that they occupy horizontal or vertical space, but they carry no ink. That makes VT a frequent source of hard-to-see bugs: trailing spaces that break string equality, mixed tabs and spaces that confuse indentation-sensitive languages, or the wrong newline convention (LF vs CRLF) between operating systems. Its binary byte is 00001011.
All encodings at a glance
| Decimal | 11 |
| Hexadecimal | 0x0B |
| Octal | 0013 |
| Binary | 00001011 |
| HTML numeric entity |  |
| URL encoding | %0B |
| UTF-8 bytes | 0x0B |
Code snippets
JavaScript
String.fromCharCode(11); // "VT"
11.toString(16); // "0b"Python
chr(11) # control char VT
ord(chr(11)) # 11
hex(11) # '0x0b'HTML
 <!-- numeric entity (no named entity for this character) -->Programming notes
- ▸Vertical Tab (code 11) is invisible but significant — trailing or mixed whitespace silently breaks string equality and diffs.
- ▸Normalize line endings and trim whitespace explicitly rather than assuming input is clean.
- ▸Its byte value 11 (0x0B) lets you match it precisely in a byte-level scan.
Frequently asked questions
What character is ASCII code 11?
ASCII code 11 is Vertical Tab (VT), a non-printing control/whitespace character. In hexadecimal it is 0x0B and in binary 00001011. It has no visible glyph — it controls formatting or hardware instead of drawing a symbol.
What is 0x0B in ASCII?
Hexadecimal 0x0B equals decimal 11, which is theVertical Tab control character (VT). To convert hex to ASCII yourself, read the two hex digits as a base-16 number (0x0B = 11) and look up that code point.
How do I write the character with code 11 in code?
In JavaScript use String.fromCharCode(11); in Python use chr(11); in HTML use the numeric entity . In a URL it is percent-encoded as %0B, and in UTF-8 it is stored as the byte sequence 0x0B.