2026年WebPと画像圧縮でCore Web Vitalsをクリアする方法
新着2026-02-011分で読めます1ツール
画像圧縮とWebPでLCP・CLSを改善。サイト運営者向け技術ガイド。
What Are Core Web Vitals?
LCP (Largest Contentful Paint), FID (First Input Delay), CLS (Cumulative Layout Shift). Google uses them to rank sites.
The Role of Images in Performance
Large images slow down LCP. Use WebP or compressed JPG. Right dimensions for the viewport.
Image Strategy for Fast Sites
Compress to 80–85%. Use WebP with JPG fallback. Responsive dimensions.
Frequently Asked Questions
- What is LCP?
- Largest Contentful Paint—the time until the largest element on the page appears.