Free Number Base Converter (Binary, Hex, Octal, Decimal)
Type a number in any base · binary, octal, decimal, or hex · and see it converted to all the others instantly.
Frequently asked
Why do developers use hexadecimal?
One hex digit is exactly four bits, so bytes read as clean two-character pairs · FF is 11111111. That's why memory addresses, color codes, hashes, and MAC addresses are written in hex.
How large a number can this handle?
Arbitrarily large · conversion uses BigInt rather than floating-point numbers, so 256-bit values (like hashes and keys) convert without precision loss.
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