This is such a cool app, spending some time with it, seems solid!! Are palette .PAL files standard with other apps, or custom for img2pixel?
Thanks! The .pal format is standard (can be used by aseprite, grafx2, graphicsgale, gimp etc). You can find many palettes here: https://lospec.com/palette-list
The next release however (probably toady) will add support for more palette formats and will improve the quality of the created images tremendously.