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.
Lazy Loading Injection
Retroactively adds loading="lazy" to all existing images in your content without touching your database records. Reversible in one click.
BunnyCDN Integration
Connect your BunnyCDN storage zone to automatically offload optimized images. Reduces server bandwidth and accelerates global delivery.
HEIC / iPhone Support
Converts HEIC photos from iPhone directly on upload. No more manual conversion steps when clients send photos from their phone.
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
- + Added HEIC / iPhone photo support
- + BunnyCDN storage offload integration
- + Improved bulk processing speed by 40%
- + 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