You can convert any value between binary (base 2), octal (base 8), decimal (base 10), and hexadecimal (base 16). Type a number in one field and the others update instantly.

Base conversion is a staple of low-level programming and debugging — working with memory addresses, colour codes, file permissions, and bitmasks, which are usually written in hex or binary rather than decimal.

Yes — each field only accepts digits valid for its base, so you cannot accidentally enter a "9" in a binary field. Invalid characters are flagged as you type.

No — the conversion runs entirely in your browser, so nothing you type is uploaded or stored.