About the Stack & Queue Visualizer

See LIFO and FIFO behavior directly, not just in a diagram.

What it is

The Stack & Queue Visualizer animates push, pop, and peek operations on a stack (LIFO), or enqueue, dequeue, and peek on a queue (FIFO), on a block-based diagram. An optional capacity limit demonstrates overflow and underflow explicitly, and a running history log tracks every operation performed.

Features

Stack and queue modes

Toggle between LIFO and FIFO with their own visual representations.

Overflow/underflow handling

Optional fixed capacity demonstrates both cases with clear messages.

Operation history log

A running record of every operation and the resulting state.

Guided examples

A balanced-parentheses checker and a print-queue simulation.

Ready to use it?

Free, no sign-up required.

Open the Stack & Queue Visualizer