>>1499168It depends on the screen resolution or device (if using mobile browser and site was coded that way anyway even if you have 4k phone screen). the reason is probably to save data or so to not make your device "slow" when opening/previewing very large images on the small screen.
it happens a lot on sites like news sites or media sites I usually had to resize my browser or get the URL of the image and then remove the trailing SQL codes or link parameters so it would take me to the largest video/image size of the asset files. so something like link.site/1234/image.jpg?size=mobile just remove the trailing stuff after the ".jpg" and if you go to that link directly the file will be of original size. sometimes the even smarter thing to do is replace the jpg with png this works with wallpaper or stock photo sites it will show the much higher quality image. this used to be doable on site like twitter which sometimes puts out the jpeg only even if users uploaded PNG but they changed it to do it dynamically. on sites like facebook it would have image_a124b452c43d_n.jpg n stands for normal I think, and changing it to _o.jpg makes it original size but that also changed they made it so it's impossible to get the original quality anymore.
