Images
Oversized images
No image is served more than 1.5x its rendered dimensions
What we check
No image is served more than 1.5x its rendered dimensions
Why it matters
Serving a huge file to show a small image wastes the visitor's data.
How to fix it
Serve appropriately sized images with srcset.
How it affects your score
This check sits in Images, which is worth 10% of the overall score. A critical result costs the full weight of the check; a warning costs half. If we can't measure it on your page, we leave it out of the score entirely.