Bitwise Calculator

AND, OR, XOR, NOT, NAND, NOR and XNOR, plus logical left shift (SHL) and right shift (SHR). NOT takes a single operand, and the two shifts take a value plus a shift amount, while the rest combine two values.

Decimal by default, or a 0x prefix for hex, 0o for octal and 0b for binary. Underscores and spaces are allowed inside a number as digit separators, so 0b1111_0000 and 1 000 both parse fine.

Yes. Every calculation runs on BigInt rather than the 32-bit signed integers that JavaScript bitwise operators use, so 8, 16, 32 and 64 bit widths are all exact, including the full unsigned 64-bit range up to 18446744073709551615.

A negative decimal is wrapped into the chosen width using twos complement, so -1 at 8 bits becomes 11111111 and -16 becomes 11110000. Each card shows both the unsigned decimal and the signed decimal reading of the same bit pattern.

Logical. Operands are treated as unsigned inside the width, so a right shift always feeds zeros into the top bits rather than copying a sign bit. Shifting by the width or more clears every bit and gives zero.

Binary is zero-padded to the full width and grouped in nibbles of four, like 1111 0000. Hex is uppercase with a 0x prefix and padded to the width, and octal carries a 0o prefix, so an 8-bit 240 reads as 0xF0 and 0o360.

A value that is not a recognised number shows an 'Invalid number' error. Leaving the second box empty for a two-operand op asks you to 'Enter the second value', and an empty shift box asks for a shift amount.

No. Everything runs in your browser, so the values you type never leave your device. That makes it safe for reverse-engineering flags or register masks from private firmware.

A base converter just re-encodes one number across bases. This tool also applies a logic operation or shift between operands at a fixed width and shows the masked result, which is what you need when working with flags, permission bits and hardware registers.