nprofile1qy2hwumn8ghj7un9d3shjtnyd968gmewwp6kyqpqcxsreax89hvyurrr6jmj3x5fct088x26c3c6f5qz4gxn0aw2aw8scjv0nr (nprofile…v0nr) Pixelmator Pro’s “Export for Web” is one of the better tools I’ve seen (and it’s cool to hear it offers similarly efficient compression as ImageOptim). Unfortunately it only fully offers the last item on my checklist.
It does allow you to reduce the color depth to 256 colors but it’s still a bit limited beyond that. For example, unless I’m mistaken, there’s no way to export, say, an animated image with an only 8 custom-picked colors and no dithering. Or to export an image with only 32 colors using an adaptive color reduction algorithm and noise-based dithering.