Base Converter

No upload · runs in your browser

Binarybase 2Octalbase 8Decimalbase 10Hexadecimalbase 16Custom basebase

Every conversion is arithmetic done in this page, no request is made.

How it works

Binary, Hex, Decimal & Octal Converter : Any Base 2 to 36

Convert between binary, octal, decimal, hex and any base up to 36. BigInt maths keeps a 256-bit value exact, and the bit length updates as you type.

What this does

Binary, octal, decimal and hexadecimal fields that all follow whichever one you type into
A fifth field on any base from 2 to 36, using the digits 0-9 and then A-Z
BigInt throughout, so a 256-bit hash converts digit for digit with no float rounding
Bit length, byte count, the smallest standard width it fits, and binary grouped into nibbles or bytes

FAQ

No. It works on whole numbers only, so a decimal point is refused as a digit the base does not have.

Each field accepts only the digits that exist in its own base, so an 8 in the octal field, or a capital O standing in for a zero in binary, is refused with the offending character named. A 0x, 0b or 0o prefix is accepted only in the field whose base it names. Spaces, underscores and commas are stripped for you, so a grouped value pastes cleanly, and a leading minus is fine, negatives convert with the sign carried through, at which point the “fits in” stat reads signed instead of naming a width.

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