A control character is a non-printing character in a character set. Control characters perform various printer and display control operations, rather than displaying symbols. The list below contains ASCII control characters.
| Description | Symbol | HTML Decimal Code | HTML Hex Code |
|---|---|---|---|
| Null | ␀ | ␀ | ␀ |
| Start of header | ␁ | ␁ | ␁ |
| Start of text | ␂ | ␂ | ␂ |
| End of text | ␃ | ␃ | ␃ |
| End of transmission | ␄ | ␄ | ␄ |
| Enquiry | ␅ | ␅ | ␅ |
| Acknowledgment | ␆ | ␆ | ␆ |
| Bell | ␇ | ␇ | ␇ |
| Backspace | ␈ | ␈ | ␈ |
| Horizontal tab | ␉ | ␉ | ␉ |
| Line feed | ␊ | ␊ | ða; |
| Vertical tab | ␋ | ␋ | ␋ |
| Form feed | ␌ | ␌ | ␌ |
| Carriage return | ␍ | ␍ | ␍ |
| Shift out | ␎ | ␎ | ␎ |
| Shift in | ␏ | ␏ | ␏ |
| Data link escape | ␐ | ␐ | ␐ |
| Device control 1 | ␑ | ␑ | ␑ |
| Device control 2 | ␒ | ␒ | ␒ |
| Device control 3 | ␓ | ␓ | ␓ |
| Device control 4 | ␔ | ␔ | ␔ |
| Negative acknowledgment | ␕ | ␕ | ␕ |
| Synchronous idle | ␖ | ␖ | ␖ |
| End of transmission block | ␗ | ␗ | ␗ |
| Cancel | ␘ | ␘ | ␘ |
| End of medium | ␙ | ␙ | ␙ |
| Substitute | ␚ | ␚ | ␚ |
| Escape | ␛ | ␛ | ␛ |
| File separator | ␜ | ␜ | ␜ |
| Group separator | ␝ | ␝ | ␝ |
| Record separator | ␞ | ␞ | ␞ |
| Unit separator | ␟ | ␟ | ␟ |
| Space | ␠ | ␠ | ␠ |
| Delete | ␡ | ␡ | ␡ |