Facebook link / image thumbnail always blurry?!

[MoeNAGY]

Hi, so I'm using a WordPress page featured image, sized at 1200 x 628 px and saved as .PNG.
When it's on my PC, the image is crystal clear. But when share my website's link on FB, the page thumbnail images shows super blurry?!
What's going on?! I'm certain I almost tried everything!

 

[Rob Whisonant]

If the image is smaller than there recommended image size, Facebook is going to stretch it out to fit. That would cause it to blur. Make sure the image is at least the Facebook recommended image size. You should be able to get the current image size recommended sizes on Facebook.