Docs · Images
Image file size
Images are under 500KB
What this check looks at
Optia flags images heavier than 500KB.
Why it matters
Oversized images are the most common cause of slow pages. Every oversized hero image delays Largest Contentful Paint, burns mobile data, and drags down the speed signals search engines measure in the field.
How to fix it
- Resize images to the largest size they actually display at — don't ship 4000px originals into a 800px slot.
- Compress on export (quality 70–85 is usually visually lossless) or automate it with your CDN.
- Lazy-load below-the-fold images with
loading="lazy"so they don't compete with critical content.