Developer

Number Base Converter

Convert numbers between decimal, hexadecimal, binary and octal.

Developer

Convert number bases

Local only

Number

Everything stays in your browser

Your text is processed on your device — nothing is uploaded to a server.

Plain numbers are read as decimal. Use the 0x, 0b or 0o prefix for hex, binary or octal input. Very large whole numbers are supported exactly.

Good to know

How do I use it?

Paste or type into the box and press “Convert”. Then copy or download the result.

What should I know?

Plain numbers are read as decimal. Use the 0x, 0b or 0o prefix for hex, binary or octal input. Very large whole numbers are supported exactly.

Is my text uploaded?

No. It is processed in your browser and never sent to a server. No account is needed.