What is Number Base Converter?

Convert numbers between any bases — binary (base 2), octal (base 8), decimal (base 10), hexadecimal (base 16), and custom bases up to 36. See all representations simultaneously as you type, with grouped digits for readability.

How to use

1. Enter a number in any supported base — select the input base from the dropdown or type a prefix (0b, 0o, 0x).
2. View instant conversions to all common bases displayed side by side, with digit grouping for long numbers.
3. Copy any individual result, or toggle bit-level visualization for binary numbers.

Result

Enter decimal 255: binary = 1111 1111, octal = 377, hex = FF. Or enter hex 'FF00FF' to see its decimal equivalent 16711935.

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