Number Base Converter
Convert numbers between binary, octal, decimal, and hexadecimal.
Runs in your browser · no upload
Number base converter
Convert whole numbers of any size between binary, octal, decimal, and hexadecimal.
Binary
1111 1111Octal
377Decimal
255Hex
FFQuestions
Is there a size limit?
No practical limit. Conversion uses arbitrary-precision integers, so very large numbers stay exact.
Are negative numbers supported?
Yes, with a leading minus sign. Two's-complement output is not shown.
Can I convert fractions?
No. The converter handles whole numbers only.