Description
Return the indexed hexadecimal character using digits 0-9 and A-F when uppercase, otherwise a-f.
A positional encoding separates numeric digit values, alphabet symbols and final-block padding. An alphabet lookup is not a whole-stream codec, and character count can differ from the number of source bytes represented.
Return the indexed hexadecimal character using digits 0-9 and A-F when uppercase, otherwise a-f.
When to use this tool
Use Base16 Nibble Value Character when checking one alphabet mapping or bounded encoding-padding term.
How to use the tool and how it works
- Enter value, uppercase. Use the units and conventions below.
- Run the tool. Correct any format, range, or cross-field input error before interpreting the output.
- Read symbol. Use the output convention below.
Require whole value in [0,15]. Return the indexed hexadecimal character using digits 0-9 and A-F when uppercase, otherwise a-f.1
Alphabet, tail pad bits and written padding depend on the selected base encoding. This tool handles only its stated local component.2
| Input field | Meaning and units | Accepted input |
|---|---|---|
| value | Value | Required. Safe integer; minimum 0; maximum 15. |
| uppercase | Uppercase | Required. Boolean. |
| Output field | Interpretation | Returned shape |
|---|---|---|
| symbol | Symbol | Required. Text; maximum UTF-16 length 8192. |
{
"input": {
"value": 15,
"uppercase": true
},
"output": {
"symbol": "F"
}
}Limitations and assumptions
- This maps one nibble, not a whole byte or integer. Leading zeros, byte order and stream separators require separate handling.
- Inputs must satisfy both the field types and the cross-field conditions above. Invalid input causes an error; a successful false flag or documented placeholder is a different result.
- Numeric calculations use binary floating point unless exact decimal-integer arithmetic is explicitly stated. No hidden measurement tolerance or decimal rounding is added; nonfinite or out-of-contract results are rejected. Numeric signed-zero results are exported as zero.
Alternative or Complementary methods
Use the complete codec matching the intended alphabet and padding policy for real payloads and interoperability checks.
References
-
Calculation and input contract: encode/base16-nibble-value-character — tool.io
-
Base16, Base32 and Base64: RFC 4648 — Internet Engineering Task Force
Similar or alternative tools
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Return the indexed symbol from A-Z, a-z, 0-9 followed by +/ for standard or -_ for url.