Images Not Optimized Causing Large File Sizes
Images are loading large uncompressed files (5MB+). Page load is slow because image downloads are slow. High resolution images used even on mobile. No lazy loading.
Web images need optimization for format, size, and lazy loading. Unoptimized images account for >50% of page weight in many sites.
Common Causes
- Using PNG for photographs instead of WebP/JPEG
- Not resizing images to display size
- No responsive image srcset for different screens
- Loading images eagerly instead of lazy loading
- Using uncompressed raw images from design tool
How to Fix It
Use modern image formats and lazy loading:

Compress images online with TinyPNG or use build tool like imagemin.
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Get HelpFrequently Asked Questions
What image format should I use?
WebP for modern browsers (best compression). JPEG for photos, PNG for icons/text with transparency. Use srcset for fallback.
Does lazy loading hurt SEO?
No, Google indexes lazy loaded images. Use loading='lazy' for below-fold images, eager for above-fold.