6 Ways to Optimize Website Images Without Impacting Performance

5. Ensure images are in the right format. Incorrect image format is a surprisingly common problem. An image that's saved as a JPEG but should be a GIF or PNG can be several times larger than it needs to be.

6. Defer rendering below-the-fold images. Be sure you're serving your images in the order they need to appear. All too often, I see pages where the feature image loads last instead of first.