Type in any field
Binary, decimal, hex or octal — start typing in whichever base you have.
Binary, Hex & Decimal Converter
Type a number into any field and watch binary, decimal, hexadecimal and octal update instantly, together.
How it works
See instant conversion
The other three fields update live using standard radix conversion.
Read the byte grouping
Binary digits are grouped every 4 bits so they're easier to read and compare.
FAQ
What happens if I type an invalid character?
The field shows a clear inline error describing which characters are allowed for that number base, and the other fields are left untouched until you fix it.
How large a number can I convert?
Values are handled as standard JavaScript numbers, which are safe up to 2^53 - 1. Larger values show an error instead of an incorrect result.
What is the byte grouping shown under binary?
The binary value is split into groups of 4 bits separated by spaces, making it easier to read and compare to hex digits.