How positional number systems work
Each digit represents a power of its base. Binary uses 0 and 1, octal uses 0 through 7, decimal uses 0 through 9, and hexadecimal adds A through F.
Example
Decimal 255 is binary 11111111, octal 377, and hexadecimal FF. The bit display groups the binary representation into full bytes.
Precision
The converter uses browser big integers, so large whole numbers are not rounded like ordinary floating-point values.