SLK_img2pixel is a tool for converting images to a limited palette. It was originally created to convert textures for retro-style games (ps1, quake, etc.), but can be used for sprites, too.
This project is free Software. You can find the source code on Github!
SLK_img2pixel needs a palette to convert images. Any palette in the .pal (and .png, .hex and .gpl) format should be supported. I have included a few palettes in the download, but you will probably need more variety. There is a great collection of palettes on lospec.com
If you want to see a feature added to SLK_img2pixel, feel free to request it, I will most likely add it (If I have the time)!
In case you are wondering whether you can use the generated images for your projects:
I do not take any ownership in any of the generated images, you can freely use, distribute and even sell them!
SLK_img2pixel has a Discord server! You can suggest features, report problems or just talk there.
Link: https://discord.gg/Nch8hjdZ2V
Any Sample Images are the Property of the Designer, Developer or Website They Were Obtained from.