The logo is 3.2 kb as a PNG, 3.2 kb as a webp, 2.7 kb as an avif, and .8 kb as a JXL
All are lossless, JXL lossless is crazy good
its 6.8 kb with jpegli (modern jpeg encoder) at what I would consider “good enough” quality (the original jpeg encoder is a fair amount worse and mozjpeg is actually a lot worse for some reason on this image)
using the image toolbox app for the testing btw, its foss and on fdroid
The logo is 3.2 kb as a PNG, 3.2 kb as a webp, 2.7 kb as an avif, and .8 kb as a JXL
All are lossless, JXL lossless is crazy good
its 6.8 kb with jpegli (modern jpeg encoder) at what I would consider “good enough” quality (the original jpeg encoder is a fair amount worse and mozjpeg is actually a lot worse for some reason on this image)
using the image toolbox app for the testing btw, its foss and on fdroid