Image Boost is a free, powerful image optimization plugin that works 100% locally on your server. Unlike other optimization plugins, Image Boost requires no API keys , makes no external requests , and has no usage limits . Your images never leave your server. It uses your server’s built-in Imagick o
PricingFree downloadThe WordPress.org download is free. Pro versions, add-ons or external services may cost extra.
CompatibilityRequires WordPress 6.0 and PHP 7.4.
SourceWordPress plugins · Nov 5, 2026
01 / Source details
Aboutthistool.
Image Boost is a free, powerful image optimization plugin that works 100% locally on your server. Unlike other optimization plugins, Image Boost requires no API keys , makes no external requests , and has no usage limits . Your images never leave your server.
It uses your server’s built-in Imagick or GD library to intelligently compress JPEG, PNG, GIF, and WebP images — reducing file sizes by up to 60% without visible quality loss.
🚀 Why Image Boost?
100% Local Processing — No API keys, no cloud uploads, no privacy concerns
Zero Usage Limits — Optimize unlimited images, forever
Smart Compression — Imperceptible quality loss with significant file size reduction
WebP Delivery — Automatic <picture> tag output for modern browser support
One-Click Bulk Optimize — Process your entire media library in minutes
Full Backup System — Every original is safely backed up and can be restored instantly
WooCommerce Ready — Works with product images, galleries, and all custom post types
⚡ How It Works
01Upload an image normally to your Media Library.
02Image Boost automatically compresses it in the background (if auto-optimize is enabled).
03A WebP version is generated and served to supported browsers via smart <picture> tags.
04View savings per image directly in the Media Library, or check the beautiful Dashboard for overall stats.
🎯 Compression Levels
Normal — Lossless metadata stripping. Zero quality loss. ~5-15% savings.
Pro — Smart lossy compression with imperceptible quality loss. ~40-60% savings. (Recommended)
📋 Full Feature List
Two compression levels: Normal (Lossless) and Pro (Smart Lossy)
Metadata stripping with optional copyright preservation
Native lazy loading injection
Skip specific thumbnail sizes
30-Day Analytics Dashboard with savings chart
WooCommerce & Custom Post Type support
Multisite compatible
Clean uninstall with optional data removal
Beautiful, modern admin dashboard with dark theme
Comprehensive documentation page built-in
See it in action
Screenshots & previews.
Dashboard — Beautiful overview showing optimization progress, space saved, and compression statistics.Settings — Configure compression level, WebP conversion, backup preferences, and image resizing options.Bulk Optimize — One-click batch processing with real-time progress tracking.Media Library — Per-image optimization status, savings percentage, and one-click restore directly in the upload list.
02 / Source details
Gettingstarted.
Automatic Installation
01Go to Plugins → Add New in your WordPress admin.
02Search for “Image Boost”.
03Click Install Now , then Activate .
Manual Installation
04Download the plugin ZIP file.
05Go to Plugins → Add New → Upload Plugin .
06Upload the ZIP file and click Install Now .
07Activate the plugin.
After Activation
08Navigate to Image Boost → Dashboard to see your media library overview.
09Go to Image Boost → Settings to configure compression level, WebP conversion, and backup preferences.
10Use Image Boost → Bulk Optimize to compress all existing images at once.
03 / Source details
Frequently asked questions.
Does it work entirely locally?
Yes. Image Boost processes everything on your own server using Imagick or GD. No external API calls are made, and your images never leave your server.
Does it require an API key?
No. Image Boost is completely self-contained with zero external dependencies.
Are original images safe?
Yes! Originals are safely backed up in /wp-content/uploads/imgboost-backups/ and can be restored with a single click from the Media Library. Backups are protected from direct web access.
What image formats are supported?
JPEG, PNG, GIF, and WebP images can be optimized. WebP versions are automatically generated for JPEG, PNG, and GIF originals.
Does it work with WooCommerce?
Yes, all WooCommerce product images, gallery images, and thumbnails are fully supported.
Will it slow down my site during optimization?
No. Bulk optimization processes one image at a time with built-in CPU throttling and memory management. Your site remains responsive throughout.
What happens if I deactivate the plugin?
Your optimized images remain optimized. Backups are preserved. No data is deleted on deactivation. If you uninstall (delete) the plugin, you can optionally remove all plugin data via the Settings page.
Does it work on shared hosting?
Yes. Image Boost includes memory pre-flight checks, Imagick resource limits, and single-threaded processing to work safely on shared hosting environments.
Can I exclude certain image sizes from optimization?
Yes. The Settings page allows you to select which WordPress image sizes to skip during optimization.
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