ASCII code table/character code reverse lookup tool
View and search standard ASCII 0–127, including reverse lookups by character or number.
Reverse lookup by character or code
A, 65, 0x41, 0o101, 0b01000001, U+0041can be confirmed as the same character.
ASCII 65 details
Latin Capital Letter A
Program/HTML notation
ASCII code list (0-127)
Select a row to display details. Each code value can be copied from the button in the table.
Move quickly:
Showing 128 results
| characters | decimal | hexadecimal | octal | binary | Unicode | Abbreviation | English name | Description | Category |
|---|
No ASCII characters match the condition.
About this tool
You can search and reverse lookup of ASCII codes, control characters, and character code values without the need for installation.
Features
- Standard ASCII 0–127 (7-bit)
- Decimal, hexadecimal, octal, binary, Unicode notation
- Control character names, classification, and escape notation in major languages
How to use
- Enter a character or code to perform a reverse lookup.
- Narrow down the list by searching and categorizing.
- Review the row details and copy the required values.
Limitations
- "Extended ASCII" numbers 128 to 255 are not listed because their assignments differ depending on the character set.
- Automatic judgment treats numbers without a prefix as decimal numbers. The octal number is
0o, the binary number is0bPlease add. - Actual copying of control characters may cause invisible behavior at the paste destination.