Map resizer
Version: Stable (if you are using mobile, change to pc view to use this tool)More features like fixing deformed map coming soon
Example of using Map Resizer:

How to use:
1. Upload a map JSON and map tilesheet image file(make sure the tilesize of the tileset is same as the recorded data of the map JSON)2. Click zoom in / out button and tune the size untill you see the whole map, you can also drag the map (for PC)
3. Add / remove columns / rows from buttons in four directions.
4. Click export button after finish.