Of course, the photos are resized and recompressed before uploading to the servers of FB ... Modern cameras and even phones now take 20-megapixel photos, which are 10 megabytes in size and up. At the same time - to see a relatively good looking photo on the screen you need a few hundred KB or about 100 times less information. Now imagine that FB has to buy equipment for 100 times more money, and maintain 100 times larger data centers, just so that your photos can live on their servers in their original unjustifiably large size ... Accordingly, the algorithms for resizing, compression, "crushing", etc. they become more and more brutal, and even if they are given Artificial Intelligence, the quality eventually suffers. Separately, the sizes and ways in which they are displayed on the screen and "folded" in the overall design of their pages. In my opinion, if you resize your photo with a program like PhotoShop or IrfanView to the resolution in which it will be shown on the screen anyway, and if you compress it to JPEG with good quality and small size (less than 1 MB, most better about 100 KB), the chance to see it on your wall beautifully is much higher. Try and succeed!
1 little_forfun answered
Of course, the photos are resized and recompressed before uploading to the servers of FB ... Modern cameras and even phones now take 20-megapixel photos, which are 10 megabytes in size and up. At the same time - to see a relatively good looking photo on the screen you need a few hundred KB or about 100 times less information. Now imagine that FB has to buy equipment for 100 times more money, and maintain 100 times larger data centers, just so that your photos can live on their servers in their original unjustifiably large size ... Accordingly, the algorithms for resizing, compression, "crushing", etc. they become more and more brutal, and even if they are given Artificial Intelligence, the quality eventually suffers. Separately, the sizes and ways in which they are displayed on the screen and "folded" in the overall design of their pages. In my opinion, if you resize your photo with a program like PhotoShop or IrfanView to the resolution in which it will be shown on the screen anyway, and if you compress it to JPEG with good quality and small size (less than 1 MB, most better about 100 KB), the chance to see it on your wall beautifully is much higher. Try and succeed!