ASCII / Unicode Lookup
Character ⇄ code point — dec / hex / bin / oct, all of them.
What it does: Look up a character's code value, or look up a character from its code value.
When to use it: When debugging strings, protocols, key codes, or escapes.
MEANS Different representations of the same character; hex code points are commonly used in programming.
No history yet. Each calculation is automatically saved to this device.
How to use the ASCII lookup
Enter a character or code value.
- 01
Enter a character or code value
Type a character (e.g.
A), or a code value (65,0x41,0b1000001). - 02
Auto-detect
A number is treated as a code value to look up the character; otherwise the first character is used.
- 03
Read across bases
Get decimal/hex/binary/octal, with standard abbreviations for control characters.
Common questions, answered in 3 minutes
How are ASCII and Unicode related?
ASCII is the basic character set for 0–127; Unicode is a superset of it (the first 128 code points are identical) and extends to characters worldwide. This tool supports the full Unicode code point range.
What are control characters?
0–31 and 127 are non-printable control codes, such as TAB(9), line feed LF(10), carriage return CR(13), and ESC(27). This tool shows their abbreviations.
How much do upper and lower case differ?
In ASCII an uppercase letter is 32 less than its lowercase counterpart (A=65, a=97) — exactly a difference of bit 5.
Standards and sources referenced by this tool
| Item | Value / Formula | Source |
|---|---|---|
| Character encoding | ASCII / Unicode code points | ASCII / Unicode standard |
ASCII/Unicode standard, no external API.