What this does
Convert a number between binary, octal, decimal, and hex — edit any of the four fields and the others update live. Numbers of any size are supported, using arbitrary-precision arithmetic instead of regular JavaScript numbers. The bit viewer shows a two's complement bit layout you can click to flip, and the bitwise calculator runs AND, OR, XOR, NOT, SHL, and SHR on two decimal operands.
Privacy
This runs entirely in your browser. Nothing is uploaded.