PixelFixer

PixelFixer is a simple-to-use but very powerful pixel art tool for cleaning up fuzzy pixel art, and also removing backgrounds and simplifying colors and more!

It is especially suited for perfectly downsampling AI-generated pixel art as well as screenshots of pixelated games and art.

What sets this program apart is the sheer reliability of the pixel size detection algorithm, which is truly the core of a program like this. A year of trial and error, and many hours of evolutionary training on a manually labeled dataset.  

Features list:

• Sleek scalable UI with support for drag & drop and clipboard pasting.
• Automatic pixel size detection, works with non-integer pixel sizes.
• Automatic and tunable downsampling algorithm.
• Background removal powered by RMBG-2.0, tuned for pixel art.
• Color merging algorithm for merging together visually similar patches of pixels.
• Deep dithering implementation, application only where it's visually appealing (very tunable).
• Simple nearest-neighbour upscaler.
• Metadata passthrough. (Explicit NovelAI support)

Planned features:

• Manual grid-alignment tools (non-planar as well).
• GIF support.