chr2img is a quick little nodejs app that converts a given chr file and palette into a large 128x512 png image suitable for use with tile editors. (Such as Tiled) This program expects the format exported by NES Screen Tool, but it is likely that other programs will also work.

Run the command as follows:

chr2img [chr file to convert] [pal file to convert] [file to save output to

chr2img graphics/tiles.chr graphics/palettes/main_bg.pal ./test.png