WordPress Lazy Loading Images: Best Practices and Fixes
Lazy loading significantly improves performance, but ensure your LCP image is excluded to avoid negative impacts on Core Web Vitals scores.
Based on 8 community reports.
Linked sources: 8.
Known Issues
- Blurry images in Chromium browsers due to srcset mismatches
- LCP score degradation if the hero image is lazy loaded
- Potential database bloat from excessive optimization logs
Community Q&A
Should I lazy load my LCP image?
No, you should exclude your Largest Contentful Paint (LCP) image from lazy loading to ensure it renders as quickly as possible for better Core Web Vitals.
Why are my images blurry after enabling lazy loading?
This is often caused by a srcset mismatch where the browser selects a low-resolution version. Adding explicit width and height attributes to your images usually resolves this.
Does lazy loading improve actual site speed?
Lazy loading improves perceived speed and initial page load times by deferring off-screen images, though it does not change the underlying server response time.
Reddit Sources
- I rebuilt my WordPress cache + speed optimization plugin from scratch — looking for feedback (r/Wordpress)
- I built a plugin that stops Elementor telemetry and optimizes websites built with Elementor (r/Wordpress)
- Spent a week optimizing Core Web Vitals across 3 sites — here’s what actually moved the needle (r/Wordpress)
- [PROMO] I built a free WordPress plugin that converts images to WebP/AVIF and audits image SEO - no API key needed (r/Wordpress)
- [PROMO] Looking for feedback on the WordPress plugin we’ve been building. (r/Wordpress)
- How I Took a Client’s WordPress Site from 40 to 90+ Speed Score (Real Fiverr Case Study) (r/Wordpress)
- Are Thousands of WordPress Users Being Misled by PageSpeed on Performance? (r/Wordpress)
- Blurry Images on Blog Index in Chromium-based browsers under Windows (r/Wordpress)