MegaOptim Image Optimizer – Optimize WebP & AVIF, Compress Images, Convert to WebP & AVIF

MegaOptim 2.0 is a WordPress image optimizer built around three goals:

1. Further compress existing WebP and AVIF images. Next-gen formats are already small — MegaOptim 2.0 squeezes more out of them while keeping originals intact.
2. Convert old JPG, PNG, and GIF images to WebP or AVIF. Modernize your Media Library and serve next-gen formats to supported browsers, with the original file preserved as a fallback.
3. Optimize old formats in place. Make JPEG and PNG smaller without changing the format — useful when you want savings but don’t want a next-gen conversion. GIF, WebP, and AVIF compression are available through MegaOptim Cloud.

The plugin is free when you use the local method (GD or Imagick on your server). For smarter compression — including further optimization of existing WebP and AVIF files — add an API key and use MegaOptim Cloud, available for around $54 per year on unlimited sites.

Why Use MegaOptim?

• Further compress existing WebP and AVIF images for extra savings
• Convert JPEG, PNG, and GIF images to WebP or AVIF
• Optimize JPEG and PNG in place with no format change (GIF/WebP/AVIF compression via Cloud)
• Bulk process the WordPress Media Library
• Browse and process folders outside the Media Library
• Free local processing or smarter MegaOptim Cloud compression
• Automatically convert or compress newly uploaded images
• Serve WebP and AVIF with Apache .htaccess or PHP passthru
• Track background jobs with a built-in queue monitor
• Restore compressed originals from backup or remove generated next-gen files
• Optionally process retina images generated by WP Retina 2x / Perfect Images
• Use WP-CLI for bulk conversion, stats, reset, logs, and queue tools

Free Local Processing or MegaOptim Cloud

MegaOptim works without an API key. If your server has GD or Imagick, you can convert JPEG/PNG/GIF to WebP, generate AVIF where your server supports it, and compress JPEG and PNG entirely on your own server — free, forever. GIF, WebP, and AVIF compression are available via MegaOptim Cloud.

For noticeably better results — including further compression of existing WebP and AVIF images, smarter JPEG/PNG optimization, and broader AVIF support — add a MegaOptim API key. MegaOptim Cloud offloads processing from your server and costs just $54 per year for unlimited sites. Get an API key from the MegaOptim dashboard and see plans at MegaOptim pricing.

What MegaOptim 2.0 Can Do

• Next-gen optimization: Further compress existing WebP and AVIF images through MegaOptim Cloud
• Convert mode: Generate WebP or AVIF versions from JPEG, PNG, and GIF images
• Compress mode: Optimize original images in place (no format change) with local or smart cloud compression
• Media Library view: Process individual images, selected images, or run bulk jobs across the library
• File System view: Browse folders on your server and bulk-process images outside the Media Library
• Upload automation: Automatically convert or compress new uploads in the background
• Delivery settings: Choose Apache .htaccess rules or PHP passthru rewriting to serve WebP and AVIF
• Queue monitor: Watch active jobs, progress, failures, and background processing state
• Tools page: Run restore actions for compressed originals or remove generated WebP/AVIF derivatives
• Restore support: Restore compressed images from backup and regenerate thumbnails
• Logging and diagnostics: Use the built-in log viewer and queue statistics through WP-CLI
• Retina support: Optionally process @2x images created by WP Retina 2x or Perfect Images

Originals Preserved

MegaOptim 2.0 keeps your original uploads in place and generates next-gen derivatives alongside them. On the front end, MegaOptim serves the best format the visitor’s browser supports while keeping the original file available as a fallback.

Migration From Older MegaOptim Versions

MegaOptim 2.0 includes background migration for legacy settings and older attachment data. Existing users can upgrade and let MegaOptim migrate data in batches, with progress shown inside the admin UI while migration is running.

1. Upload the MegaOptim plugin to /wp-content/plugins/ or install it through the WordPress plugin screen.
2. Activate the plugin.
3. In WordPress admin, go to Media > MegaOptim.
4. Open Settings and choose the local method (free) or add a MegaOptim API key for cloud processing.
5. Configure your conversion format, compression options, upload automation, and delivery method.
6. Go to the Optimizer page to process Media Library images, or switch to File System view to process folders on your server.

1. 

   Optimizer dashboard with totals, bulk actions, and space savings overview

2. 

   Comparison Modal #1

3. 

   Comparison Modal #2

4. 

   Settings: API Key

5. 

   Settings: Conversion with Cloud Processing

6. 

   Settings: Conversion with Local Processing

7. 

   Settings: Compression with Cloud Processing

8. 

   Settings: Compression with Local Processing

9. 

   Settings: Upload behavior

10. 

    Settings: Frontend delivery for WebP/Avif

11. 

    Settings: Advanced

12. 

    Settings: Queue Monitor for background jobs

2.0.2

• File System view: Convert and Compress now work on folders and single files, with live progress via the shared browser-worker loop (same mechanism as the Media Library bulk flow).
• Fix: Convert no longer drops thumbnail siblings. Every thumbnail size now produces its own .webp / .avif next to the source file.
• Fix: forced re-convert kept the freshly converted files instead of wiping them at the end of the run.
• Polished folder modal (mode-aware hero, force re-process toggle, cancel-during-run, per-file failure list).

2.0.0

• Complete refactor of the plugin (Vue 3 admin, modern PHP architecture, new conversion engine for WebP/AVIF, File System view, queue monitor, WP-CLI commands).
• Backwards compatible: legacy v1.x mode remains available and existing settings/attachment data are migrated in the background.