Hi,

I wrote a perl script to convert a cartridge spritesheet to png and back. This way, you can edit your sprites in your favorite software and update the cartridge when done.

pico2png.pl

nice! there are already some tools/scripts around ... for example
https://www.lexaloffle.com/bbs/?tid=2387
https://www.lexaloffle.com/bbs/?tid=2328

That's great, I guess I wasn't really lazy enough to check if there were any utility to do that beforehand :)

PICO8Tool looks really good!