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Enter a value in any base — binary (2), octal (8), decimal (10) or hexadecimal (16) — or type text to see its ASCII codes. Every representation updates together, with digit validation so a stray "2" in a binary number is flagged instead of silently converted.
Each digit is worth the base raised to its position: in binary 1011, the digits are worth 8 + 0 + 2 + 1 = 11 in decimal. Hexadecimal uses digits 0–9 then A–F for ten to fifteen. Programmers use hex because one hex digit is exactly 4 binary digits, making long binary values short: 11111111 = FF = 255.
Binary 11111111, hex FF — a value you will meet constantly in computing (one byte, color codes).
Yes — choose "Text (ASCII)" and each character becomes its ASCII code in the selected display; converting codes back to text works the same way in reverse.
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