Which number systems does this converter support?

Binary (base 2), octal (base 8), decimal (base 10) and hexadecimal (base 16) — in every direction, including binary to hex directly.

Can it handle large numbers?

Yes. Values up to JavaScript's safe integer range (Number.MAX_SAFE_INTEGER) convert accurately, and hex values of 64-bit length are supported for typical development use.

Does it show negative numbers?

You can convert negative decimal values; the sign carries through. For two's-complement representations, set the bit-width in the advanced panel.

Is any data sent to a server?

No. All conversion happens locally in your browser.

Base Converter

Convert numbers between binary, octal, decimal, and hexadecimal instantly.

Base Converter

Convert numbers between different bases.

Binary

Octal

Decimal

Hexadecimal

How to Use the Base Converter

1Type or paste a number into the input field.
2Pick the number system you are converting from (binary, octal, decimal or hex).
3Pick the target number system — all conversions update instantly.
4Copy the converted value with one click and use the swap button to reverse the direction.