🔌Logic Gate Simulator

Free Logic Gate Simulator

This logic gate simulator lets you experiment with the seven basic digital logic gates — AND, OR, NOT, NAND, NOR, XOR, and XNOR. Toggle input A (and input B, for two-input gates) and the output updates instantly, with the full truth table highlighted to show exactly which row you're on.

Logic gates are the building blocks of every digital circuit, from a simple alarm system to a CPU. AND outputs true only when both inputs are true; OR outputs true when either is true; XOR outputs true when the inputs differ. NAND, NOR, and XNOR are simply the inverted versions of AND, OR, and XOR.

Useful for computer science coursework, digital logic design, and Boolean algebra practice. Runs entirely in your browser — free, no sign-up.