Data & Encoding

Binary, Octal, Decimal & Hex Converter

Convert arbitrarily large BigInt integers and 8/16/32/64-bit two’s-complement values across base 2, 8, 10, and 16.

Input Radix

Integer Value (supports 0b, 0o, 0x prefixes, _ separators, and negative -)

Group digits (4-bit nibbles, 3-digit decimal, 4-char hex)Uppercase Hex (A–F)

Converted Representations (8-bit BigInt)

Binary (base 2)

1111 1111

Octal (base 8)

377

Decimal (base 10)

255

Hexadecimal (base 16)

Arbitrary precision BigInt mode: no fixed bit-width padding or two’s-complement wrap; negative integers use a leading minus sign.

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