http://bbergeron.i2p/posts/2024-04-04_use-progressive-jpegs.html
I’ve also configured Nginx to disable client-side caching on both
pictures, but I wouldn’t be surprised if some browsers act up and cache
them anyway. In such cases, pressing CTRL+F5 should replay the demo as
intended. Since you look like a caring and diligent webmaster, I’m going to
give you the command to generate a progressive JPEG, assuming you have
the ‘Imagemagick’ package installed on your system; convert < input-file > -interlace plane < output-file > Heck, have the script I use...