Colorbird Palettiste ↗
Palette generator | editor | visualizer Works great. Ongoing updates. Web apps • Create palettes from an uploaded image, edit, save, export and visualize said palettes in situ. • Name your swatches, export swatch grid pngs, CSS, palettes as JSON, and more.
• Totally free. No sign-up. Privacy first: your images never leave your computer. Why? Cos f*ck the Man. :P
* Alternate name: "Colorbird Chromaturge".