There isn't a single universal installer for "v23," as this versioning often refers to specific updates within larger software ecosystems (like LVGL or MCU-specific IDEs). However, you can find the primary versions of this tool here:
imgconv565-guiVersion 23.x.x.const uint16_t myImage[] PROGMEM = 0x8410, 0x8C51, 0x94B2, ... ; imageconverter 565 v23 install
Now that the tool is ready, explore batch conversion and CLI scripting to speed up your asset pipeline. For further reading, check the official v23 changelog and the community wiki page on dithering optimization for RGB565. There isn't a single universal installer for "v23,"