How do I fix "Missing image dimensions"?

Add width and height to prevent layout shift:  <img src="photo.jpg" alt="Photo">  <img src="photo.jpg" alt="Photo" width="800" height="600">

P2 · MediumPerformance

Missing image dimensions

Images without width/height cause layout shift

Code: missing_image_dimensions

Why it matters

Images without width/height cause layout shift. Slow experiences increase bounce rates and hurt Core Web Vitals scores. Google uses these metrics as a direct ranking signal.

How to fix

Add width and height to prevent layout shift

html

<!-- Before -->
<img src="photo.jpg" alt="Photo">

<!-- After -->
<img src="photo.jpg" alt="Photo" width="800" height="600">

Related checks in Performance

Slow First Contentful Paint

FCP exceeds 3 seconds

FCP needs improvement

FCP between 1.8-3 seconds

Slow Largest Contentful Paint

LCP exceeds 4 seconds

LCP needs improvement

LCP between 2.5-4 seconds

Poor Cumulative Layout Shift

CLS exceeds 0.25

Run a free scan to check your site

Get a complete audit in under 2 minutes. No account required.

Start Free Scan