ASCII 28
ASCII 28 is File Separator — the control character FS.
Every representation
| Character | FS (not printable) |
| Name | File Separator |
| Decimal | 28 |
| Hexadecimal | 0x1C |
| Octal | 0034 |
| Binary | 00011100 |
| HTML entity |  |
| Escape sequence | \x1C |
| Unicode | U+001C |
| Keyboard | Ctrl+\ |
| Group | Control character |
What it is for
The coarsest of four data separators, intended to divide files within a stream.
Where the number comes from
Codes 0 to 31 were reserved for control: instructions to a teleprinter rather than characters to print. Code 28 is Ctrl+\ because the Ctrl key was originally wired to clear the top two bits of whatever you typed, mapping the letter \ at 92 down to 28.
Frequently asked questions
What is ASCII 28?
File Separator (FS), a control character. In hexadecimal it is 0x1C, in octal 0034, and in binary 00011100.
How do I type ASCII 28?
Press Ctrl+\ in a terminal. In a string literal you can write it as \\x1C in most languages.
Is ASCII 28 printable?
No. Codes 0 to 31 and 127 are control characters — they were instructions to a teleprinter rather than marks on paper, and most terminals show nothing for them.
Nearby codes
- ASCII 21 — NAK
- ASCII 22 — SYN
- ASCII 23 — ETB
- ASCII 24 — CAN
- ASCII 25 — EM
- ASCII 26 — SUB
- ASCII 27 — ESC
- ASCII 29 — GS
- ASCII 30 — RS
- ASCII 31 — US
- ASCII 32 — space
- ASCII 33 — !
- ASCII 34 — "
- ASCII 35 — #
Full ASCII table · Text to binary converter · Number base converter