Tilemap Collision Editor

Upload a tileset, mark tiles as solid, one-way, or hazard, and export the collision mask as JSON or CSV.

Click / drag on the grid to paint. Right-click or E to erase.
Keys: 1 solid, 2 one-way, 3 hazard, 0/E erase
Drop a tileset image here, or click Tileset to browse.
Then click tiles to paint collision.
JSON: rows of 0/1/2/3. CSV: same, comma-separated.