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Pixellize Image Optimizer
🚀 Automatically convert images to WebP format in WordPress and improve website speed, performance, and SEO — without any manual work.
The facts
- Rating
- 5★ from 3
- Active installs
- 100+
- Price
- Free
- Last updated
- 20 Aug 2026
- Added
- May 2026
- Requires WP
- 5.0
- Tested up to
- WP 7.0.4
- Requires PHP
- 7.4
- Downloads
- 691
Our analysis
AI-assistedPixellize Image Optimizer is a WordPress plugin designed to automatically convert uploaded images into the WebP format, which can enhance website loading speeds. It operates by replacing original image URLs throughout your site, including in post content and image tags, ensuring a streamlined experience without manual intervention.
The plugin is suitable for users looking to optimise their images easily, as it supports bulk optimisation and allows for on-demand image processing. It is particularly beneficial for those wanting to improve their site's performance and SEO without complex setup requirements.
Best for: This plugin suits website owners looking to improve image loading speeds and SEO through automatic image optimisation.
What it does well
- ✓Automatic WebP conversion on image upload
- ✓Bulk optimisation of existing images with a progress bar
- ✓Supports multiple image formats including JPG and PNG
- ✓Adjustable WebP quality settings
- ✓Restores original images if conversion fails
Where it falls short
- •Limited information on future updates or features
- •Requires PHP GD or Imagick for activation
Verdict
Pixellize Image Optimizer offers a straightforward solution for image optimisation in WordPress, making it a practical choice for users wanting to enhance site performance without technical complexity.
From the developer
Pixellize's own description of Pixellize Image Optimizer, lightly tidied.
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
✅ Automatic WebP conversion on image upload
✅ 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
✅ Supports JPG, JPEG, PNG, BMP, and AVIF
✅ Skips images already in WebP format
✅ Smart fallback to Imagick if GD is unavailable
✅ Adjustable WebP quality (0–100, default: 85)
✅ Optional maximum image dimension to scale down large uploads before conversion
✅ Replace image URLs in:
- Attachment tags
- srcset (responsive images)
- Post/page content
✅ Keep originals and add WebP for every size, or replace and delete to save storage
✅ Restore a single image back to its original from the Media Library
✅ Keeps original file safe if conversion fails
✅ Prevents duplicate conversions
✅ 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
Tagged as
industry
Library & Archive
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