Website Image Optimisation Checklist
A practical checklist for faster images without making a website look blurry.
Editorial note: This guide is intended to provide practical general information. Review important decisions and verify facts for your specific situation.
Choose the correct dimensions
Do not upload a 4000-pixel image when it displays at 800 pixels.
Use the right format
JPEG is often suitable for photos, PNG for transparency, SVG for simple vector graphics and WebP or AVIF for efficient modern delivery.
Compress with a visual check
Compare the original and result at the actual display size.
Add useful alt text
Describe the purpose of meaningful images. Decorative images can use empty alt text.
Lazy-load below the fold
Delay non-critical images so the first screen loads faster.
Final takeaway
A good workflow combines the speed of digital tools with human review, privacy awareness and clear responsibility for the final result.