About this plugin
Pixellize Image Optimizer is a fast, lightweight, and beginner-friendly WordPress plugin that automatically converts uploaded images into modern WebP format.
It ensures that your website loads faster by replacing original image URLs across your entire site — including post content, image tags, and responsive srcset.
⚡ No manual conversion. No complex setup. Just upload and optimize.
🔥 Key Features
âś… Automatic WebP conversion on image upload
âś… Bulk optimize images already in your library, with a live progress bar and background processing
✅ Optimize a single page’s images on demand from the admin toolbar
âś… Supports JPG, JPEG, PNG, BMP, and AVIF
âś… Skips images already in WebP format
âś… Smart fallback to Imagick if GD is unavailable
✅ Adjustable WebP quality (0–100, default: 85)
âś… Optional maximum image dimension to scale down large uploads before conversion
âś… Replace image URLs in:
- Attachment tags
- srcset (responsive images)
- Post/page content
âś… Keep originals and add WebP for every size, or replace and delete to save storage
âś… Restore a single image back to its original from the Media Library
âś… Keeps original file safe if conversion fails
âś… Prevents duplicate conversions
âś… Activation blocked if no supported library (GD/Imagick) is found
🚀 Why Use This Plugin?
- Improve Core Web Vitals (LCP, CLS)
- Boost SEO rankings
- Reduce page load time
- Save server storage
- Deliver modern image formats automatically
Requirements
- PHP 7.4 or higher
- PHP GD extension (recommended) or Imagick
Usage
- Upload images normally via Media Library
- Images are automatically converted to WebP
- Customize settings under Tools → Pixellize Image Optimizer
- Already converted images are skipped automatically
Roadmap
- Serve WebP everywhere, including page builders and ACF fields, via output rewriting
- CDN URL rewriting (use your own CDN host for images)
- AVIF output alongside WebP
- Lazy loading integration
License
This plugin is licensed under GPL v2 or later.
Author
Pixellize
io