Binary/Hex ConverterConvert numbers between binary, hex, decimal, and octal — or turn text into bytes.

Two things. Number mode links binary, octal, decimal, and hexadecimal — edit any one field and the rest update instantly. Text mode turns any text into its byte values in the base you pick, and reads those bytes back into text.

Yes. Negatives keep a leading minus in every base, and there is no size limit worth worrying about — values convert exactly, with no rounding. There is no fixed-width two’s-complement view, since that only makes sense once you pick a bit width.

No. Everything is computed locally in your browser, so nothing you type is uploaded.