Description
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. Requires Imagick 7+ with AVIF support or PHP 8.1+ with GD imageavif(). The plugin detects support automatically and warns you if AVIF is unavailable on your server.
Apache .htaccess Configuration
One click adds mod_rewrite rules to your .htaccess so Apache automatically serves .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Scans your site for the most common technical issues: missing alt text, oversized images, missing SSL, outdated plugins, pages without Open Graph tags, and more.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)
Privacy
This plugin does not collect any personal data and does not make any external HTTP requests.
Screenshots
Main dashboard — compression stats, progress bar, and quick actions. 
WebP Converter tab — batch conversion controls and status. 
AVIF Converter tab — next-gen format conversion with server support detection.
Installation
- Upload the
mits-image-optimizerfolder to/wp-content/plugins/. - Activate the plugin via Plugins Installed Plugins.
- Navigate to MITS Optimizer in the WordPress admin sidebar.
- (Optional) Click Konfiguruj .htaccess on the WebP tab to enable automatic browser-side WebP delivery.
FAQ
-
Does this plugin delete my original images?
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No. Original images are never deleted. WebP and AVIF files are saved alongside originals with a
.webpor.avifextension (e.g.photo.jpgphoto.jpg.webp). -
What happens if my server doesn’t support AVIF?
-
The AVIF tab will display a warning with the reason (e.g. Imagick version too old, or GD
imageavif()not available). WebP conversion and compression still work independently of AVIF support. -
Does it work with object-cache or page-cache plugins?
-
Yes. The plugin only modifies image files in your uploads directory and your
.htaccess. It is compatible with all major caching plugins. -
Can I run compression and WebP/AVIF conversion at the same time?
-
It is not recommended. Run one batch job at a time to avoid server load spikes and to keep progress tracking accurate.
-
Is the .htaccess change reversible?
-
Yes. The plugin wraps its rules in clearly marked comment blocks (
# BEGIN MITS WebP…# END MITS WebP). You can remove them manually or via the plugin button. -
What image formats are supported?
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Auto-compression and bulk compression support JPG, JPEG, PNG, and GIF. WebP and AVIF conversion support the same formats. GIF files are converted to static WebP/AVIF (animation is not preserved).
Reviews
There are no reviews for this plugin.
Contributors & Developers
“MITS Image Optimizer” is open source software. The following people have contributed to this plugin.
Contributors
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Interested in development?
Browse the code, check out the SVN repository, or subscribe to the development log by RSS.
Changelog
1.0.0
- Initial release.
- Auto-compression on upload with configurable quality and max-width.
- Bulk compression with background batch processing and progress tracking.
- WebP Converter with Imagick and GD support.
- AVIF Converter with Imagick 7+ and GD imageavif() support.
- Apache .htaccess automatic WebP serving configuration.
- Image Dimensions Scanner detecting oversized images in use.
- Site Audit with checks for missing alt, SSL, Open Graph, plugin updates, and more.
- WordPress Dashboard Widget with optimization statistics.