I found I kept making and drawing tile sets for little games I wanted to make and I found it time consuming. some engines require a bit of padding around each tile so that when the drawing is scaled, the next pixel isn’t shown from an adjacent tile.
I quickly wrote it in freebasic in under an hour, there’s an EXE in there too if you don’t want to use freebasic or look at the source. very little to it and everything is straightforward. The program will generate a blank tileset with both borders and internal padding indicators. I may write a program sometime that will automatically pad the tiles as needed from an existing set.
Get GenTiles zip here
Here are some png files that are generated by the program, you could use them directly if you want…