Data Structures
See how data is laid out before you write code for it. Beginner-friendly, interactive visualizers — no setup, no sign-up.
Live
2D Array Visualizer→
Paste any 2D array or matrix and see it as a grid. Color cells by value, show row and column indices, and learn how rows and columns map to memory.
MatrixGrid1D arrays too
Live
Grid Traversals→
Six ways to walk a grid, one step at a time: row-major, column-major, snake, diagonal, boundary and spiral, with live indices and a visit number on every cell.
SpiralSnakeDiagonal