What range of input bases is supported?

You can enter a number in 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.

Which bases does it convert to?

It always shows the result in base 2 (binary), 8 (octal), 10 (decimal), 16 (hex) and 36 at once, so you can read whichever you need without re-entering the value.

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 support negative numbers?

Yes. A leading minus sign is preserved, so -1010 in base 2 converts to -10 in decimal.

What happens if I enter an invalid digit?

The tool checks each character against the chosen input base. If you use a digit that is too large for that base (for example the digit 8 in a base-2 number), it reports that the input is invalid.

Does it handle fractions or decimal points?

No. This converter works on whole numbers only. Digits after a radix point are not supported.

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

Base-N number converter

Convert any whole number written in bases 2 through 36 and read it instantly in binary, octal, decimal, hexadecimal and base-36. Handy for developers working with hex colours, octal permissions, binary flags or compact base-36 IDs.

How it works

The tool parses your input one character at a time. Each digit uses the alphabet 0-9a-z, where a = 10 up to z = 35, and must be valid for the base you selected. It accumulates the value with the standard positional rule:

value = value × base + digit

building an arbitrary-precision integer (BigInt). To display the result it repeatedly divides by each target base and collects the remainders, so even very large numbers convert exactly with no overflow.

Example

Enter 255 as a base-10 number:

Base	Result
Base 2 (binary)	`11111111`
Base 8 (octal)	`377`
Base 10	`255`
Base 16 (hex)	`ff`
Base 36	`73`

Type ff with input base 16 and you get 255 back in decimal. All conversion runs locally in your browser — nothing is sent to a server.