you may need to downsize it from the raw image before posting it? there may be a setting on your camera or phone to take pictures of certain resolutions so it doesn't use up so much space and make such large files.
for example with my camera a picture can take up 22M with the NEF raw imagine, my post processing jpg file may go up to 33M. then i use gimp to downsize it, edit, adjust exposure, etc. before i put it on my website.