I built an interactive pathfinding visualizer to make algorithms easier to understand

I’ve always found pathfinding algorithms much easier to understand when I can actually see them running instead of just reading pseudocode.

So I built PathLab, an interactive browser-based pathfinding visualizer.

You can draw walls and weighted cells, generate mazes, change the animation speed, and watch different algorithms explore the grid in real time.

It currently supports:

• BFS
• DFS
• Dijkstra
• A*
• Greedy Best-First Search
• Bidirectional search
• Weighted grids
• Maze generation
• Interactive start/target nodes
• Real-time pathfinding visualization

The main goal was to make algorithms like Dijkstra and A* feel less abstract and easier to experiment with.

Tech stack:

• JavaScript
• Node.js
• Express
• HTML/CSS
• Bootstrap

I built it mainly as a learning project, but I’m hoping to keep improving it and potentially add more algorithms and features.

I’d really appreciate feedback from other developers — especially if you have ideas for algorithms, visualizations, or features I should add.

GitHub: https://github.com/zynviro/