ASCII code table/character code reverse lookup tool
Search
Additional information for this feature.
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 | Additional information for this feature. | English name | Description | Additional information for this feature. |
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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
- Additional information: ASCII 0～127 7bit
- Decimal, hexadecimal, octal, binary, Unicode notation
- Control character names, classification, and escape notation in major languages
How to use
- Input
- 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.
About this tool
You can check the ASCII characters and control codes used in programs, communication data, and escape sequences from a list or from input values.
Features
- Search
- Additional information: 10 16 8 2 Unicode
- Notation and copy for C, Java, JavaScript, Python, and HTML
How to use
- Input
- Refine the 128 tables by search term and classification.
- Select the row and copy each base number or escape notation.
Limitations
- Additional information: ASCII 128～255
- Numbers without a prefix are automatically determined and treated as decimal numbers.
Privacy: Search, reverse lookup, and copying are performed within the browser, and input contents are not sent or saved to the Develop Tools server.