About this plugin
MITS Image Optimizer is a professional image optimization toolkit for WordPress. It compresses images automatically on upload, batch-converts your entire media library to WebP and AVIF, configures Apache to serve next-gen formats automatically, and scans your site for common technical SEO issues.
Features
Auto-Compress on Upload
Every JPG/PNG above a configurable size threshold is automatically scaled and compressed before WordPress generates its thumbnail sizes. No extra steps needed.
Bulk Compression
Run a background batch job to compress all existing images in your media library. Progress is tracked and the job runs asynchronously – it won’t block your browser.
WebP Converter
Batch-convert all JPG/PNG/GIF files in your uploads directory to WebP format. Runs in the background using WP-Cron or a loopback HTTP request. Supports both Imagick and GD libraries.
AVIF Converter
Convert images to AVIF – the next-generation format that can be 30–50% smaller than WebP. 1+ with GD imageavif(). The plugin detects support automatically and warns you if AVIF is unavailable on your server.
htaccess Configuration
webp files to browsers that support them, with no code changes required in your theme.
Image Dimensions Scanner
Detects images ≥ 1600 px wide that are used in posts or as featured images. Helps you find oversized images that slow down page loads, along with their file sizes, dimensions, and WebP/AVIF conversion status.
Site Audit
Scans your site for the most common technical issues: missing alt text, oversized images, missing SSL, outdated plugins, pages without Open Graph tags, and more. Results include actionable recommendations.
Dashboard Widget
A compact stats panel on the WordPress admin dashboard showing compression savings, WebP/AVIF conversion counts, and a link to the optimizer.
Requirements
- PHP 8.0+, WordPress 6.0+
- GD or Imagick PHP extension (for WebP/compression)
- Imagick 7+ with AVIF or PHP 8.1+ GD (for AVIF conversion)
- Apache + mod_rewrite (for automatic WebP serving via.htaccess )
Developed and maintained by MITS – a Polish web agency specializing in WordPress performance and development.
Privacy
This plugin does not collect any personal data and does not make any external HTTP requests.