Images in JPEG/PNG format - WebP or AVIF recommended

How to fix

1. 1

   Automatic conversion via plugin (recommended)

   ShortPixel, Imagify or WebP Express automatically convert your images to WebP on upload and serve the correct format based on the browser.

2. 2

   Manual conversion via CLI

   bash

   # Install cwebp (Google utility)
   sudo apt install webp
   
   # Convert an image
   cwebp -q 80 image.jpg -o image.webp
   
   # Batch convert
   for f in *.jpg; do cwebp -q 80 "$f" -o "${f%.jpg}.webp"; done

3. 3

   Serve WebP with JPEG fallback via <picture>

   html

   <picture>
     <source srcset="image.avif" type="image/avif">
     <source srcset="image.webp" type="image/webp">
     <img src="image.jpg" alt="..." width="800" height="600">
   </picture>

4. 4

   Serve WebP via .htaccess (without modifying HTML)

   apache

   <IfModule mod_rewrite.c>
     RewriteEngine On
     RewriteCond %{HTTP_ACCEPT} image/webp
     RewriteCond %{REQUEST_FILENAME} .(jpe?g|png)$
     RewriteCond %{REQUEST_FILENAME}.webp -f
     RewriteRule ^ %{REQUEST_FILENAME}.webp [T=image/webp,L]
   </IfModule>