With this script you have the ability to create your tilemap using unity's built in tile mapping tools and have A* pathfinding for gameobjects on the grid. Requires Unity 2017.2 or newer. You will ...

Setting a grid of desired size. Padding the tiles with the wished padding size. Adding a Polygon Collider 2D to the whole Tile Map (experimental) Saving the map as prefab Custom window for selecting ...