I have an already optimized JPEG image in my server 32.07 kB (and in my local computer), 800px * 534px, if I request it via browser, it keeps the same width * height, but its size gets smaller 17,97 Ko and becomes pixelated.
I checked Apache configuration:
# LoadModule deflate_module modules/mod_deflate.so
HTTP/1.1 200 OK Date: Sat, 30 Jan 2016 11:31:50 GMT Server: Apache Last-Modified: Sat, 26 Dec 2015 11:56:02 GMT ETag: "804c-527cbc1833880" Accept-Ranges: bytes Content-Length: 32844 Content-Type: image/jpeg Connection: keep-alive
I am working on a LAMP environment installed on a VPS server. I sent a ticket to OVH to ask them if they are compressing images on a superior level, but still waiting for a response.
Are there other places to inpect instead of Apache ?
Another thing, I can bet it's not related to browser, because I got the same result in Firefox and Chrome.