To draw online similar old-school maps (and even isometric ones): https://probabletrain.itch.io/dungeon-scrawl
Edit: another similar map-making online tool: https://dungeonmapdoodler.com
To draw online similar old-school maps (and even isometric ones): https://probabletrain.itch.io/dungeon-scrawl
Edit: another similar map-making online tool: https://dungeonmapdoodler.com