number base converter
enter a number in any base and see it in binary, octal, decimal, hex and more.
runs on your device · free · no sign-up
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frequently asked questions
how large can the numbers be?
there is no practical limit since it uses bigint, so 64-bit and larger values convert exactly.
are prefixes like 0x accepted?
yes, 0x, 0b and 0o prefixes are accepted when they match the chosen input base, and a leading minus is supported.
is anything uploaded?
no, conversion is local to your browser.