Everything you need
No paid extensions required. All features ship with the free plugin.
WebP & AVIF Conversion
Automatically convert JPEG, PNG and GIF uploads to WebP and AVIF. Serve the right format based on browser support via <picture> elements — no JS required.
Bulk Alt Text Generation
Generate descriptive alt text for your entire media library at once. Uses image analysis to produce meaningful, accessible descriptions — not just filenames.
6-Point SEO Image Audit
Scan every image for: missing alt text, oversized files, wrong format, missing lazy load, broken src paths, and non-descriptive filenames.
Unused Media Detection
Scans your media library for images that aren't referenced anywhere on your site and flags them for cleanup — reclaim storage without guessing which files are safe to delete.
BunnyCDN Integration
Connect your BunnyCDN storage zone to automatically offload optimized images. Reduces server bandwidth and accelerates global delivery.
WP-CLI & REST API
Run bulk optimization from the command line or trigger it remotely via REST API endpoints — built for agencies automating deployments across many sites.
How it works
Install & Activate
Install from WordPress.org. No configuration required to start — it works out of the box with safe defaults.
Run the Bulk Optimizer
Go to Media → Image Optimizer and click "Optimize All". Convert your entire library with one click.
Check the SEO Audit
Open the SEO Audit tab to see a report of every image issue on your site with exact fix recommendations.
Frequently asked questions
Can't find what you're looking for? Open a support thread on WordPress.org.
Changelog
- + Bulk filename rename tool
- + Automatic alt text generation
- + CSV export for SEO audit results
- + Before/after comparison slider
- + Dashboard widgets for stats
- + AVIF format support added
- + 6-point SEO audit dashboard
- + Bulk alt text generation engine rewritten
- + Lazy loading injection tool
- + WebP conversion stability improvements
- + PHP 8.3 compatibility
More free plugins
Ready to install?
Free on WordPress.org. No account required. Works in under 2 minutes.
Download Erdo Image Optimizer