About this time, I am a little more than intrigued and a bit confused. I use my image viewing program qimgv (github) by typing qimvg 87956_60.png and was shown a photograph of a man seemingly turning his head to look at me. Source: over 1 year ago

Qimgv - Image viewer. Fast, easy to use. Optional video support. Very powerful, qt app, best for me. Source: over 1 year ago

I use qimgv, It's mostly frameless (It only has a window bar), supports going left and right through images, even sorted by date and even on a directory with 80k+ files in it. It also has some very useful features in the right-click menu and also has a folder view and is highly customizable. Source: over 1 year ago

I don't know exactly what you mean by "nothing", but JPEG XL is already supported for almost all image viewers on Linux installing the libjxl plugin system wide, and on Windows good image viewers like XnView, IrfanView e my personal favorite qimgv, and all most used browsers already supports jpeg xl, however is not enable by default and you need to enable it in the hide settings, but I agree that you probably will... Source: about 2 years ago

My personal favorite is qimgv. It even supports videos with an additional download, which is awesome for me. Source: over 2 years ago

The font-viewer that is part of font-manager can do it. Source: about 2 years ago