Try Optimole

Optimole is what I use here to serve modern image formats like WebP and AVIF automatically in WordPress. It’s very much an “install and forget” plugin: activate it, connect your account, and it starts optimizing and serving images right away. On top of that, it also handles lazy loading and delivers images via a CDN for better performance.

Pros

+Automatically serves images in modern formats like WebP and AVIF
+Install-and-forget setup (starts working right after activation)
+Lazy loads images by default so off-screen images don’t load immediately
+Chooses the best format based on the visitor’s browser and conditions
+Free plan available up to 2,000 visitors/month

Cons

-Requires creating an Optimole account and connecting a license key
-Free plan is limited to 2,000 visitors/month

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How to Serve Images in WebP Format Automatically in WordPress

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Highlights

+Automatically serves images in modern formats like WebP and AVIF
+Install-and-forget setup (starts working right after activation)
+Lazy loads images by default so off-screen images don’t load immediately

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