What range of bases is supported?

Any base from 2 to 36. Digits above 9 use letters a–z, so base-16 uses 0–9 and a–f, and base-36 uses 0–9 and a–z.

Can it handle very large numbers?

Yes. Conversions use arbitrary-precision integers (BigInt), so there is no 32-bit or 64-bit overflow — numbers with hundreds of digits convert exactly.

Does it work offline?

Yes — the entire conversion runs in your browser with no network requests, so it works offline once the page has loaded.

Base-N Number Converter

Convert a number between any bases from 2 to 36.

Base-N number converter

Convert any whole number between bases 2 through 36 — including the common binary (2), octal (8), decimal (10) and hexadecimal (16) bases, plus everything in between up to base-36.

Type your value, tell it which base the input is in, and every standard representation appears at once. Conversions use arbitrary-precision integers, so large numbers convert exactly without overflow — and it all runs locally in your browser.