Extension · Elementor · King Addons
Image Optimizer: client-side WebP conversion
This is not a server ImageMagick farm. The admin UI drives conversion in the browser (Canvas API) and posts results back. Settings: king_addons_image_optimizer_settings. Free quota option: king_addons_img_opt_free_quota.
Get King Addons
Install the plugin from WordPress.org, enable this extension in the dashboard, then follow the steps on this page.
What it actually does
Settings: quality, auto_replace_urls, auto_optimize_uploads, skip_small, min_size, resize_enabled, max_width, create_backups.
DB/meta tracks original vs optimized bytes, savings percent, status (pending/completed/skipped/failed).
Formats mentioned in the UI: JPEG, PNG, WebP. Restore uses backup paths when create_backups is on.
Where to find it in WordPress
Enable Image Optimizer. Open King Addons → Image Optimizer. Attachment metabox shows per-image status. AJAX lives in Image_Optimizer_Ajax.php.
How to set it up
- Enable Image Optimizer. Dashboard.
- Set quality and backups. Turn on create_backups before bulk convert.
- Optional resize. max_width if you want a cap on stored dimensions.
- Run from the optimizer screen. The UI fetches, converts, then saves. Watch quota remaining.
- Confirm a post. If auto_replace_urls is on, content URLs should point at optimized files.
Controls that change behavior
| Control | What the plugin does |
|---|---|
| quality | WebP/JPEG quality sent through the converter. |
| create_backups | Needed for restore. |
| auto_optimize_uploads | Convert on upload. |
| auto_replace_urls | Rewrite URLs in content to optimized files. |
When this is the right tool
- Shrinking a Media Library that never went through a CDN optimizer.
- Enforcing a max width on huge camera uploads.
Notes from the implementation
Browser conversion depends on the admin session; do not close the tab mid-bulk. kingaddons.com.
FAQ
Why did an image skip?
skip_small/min_size, already optimized, or a fetch/convert error in AJAX.
Is this Smush?
No. It is King Addons’ Canvas-based WebP pipeline.
Other King Addons extensions
Get King Addons
Image Optimizer ships in King Addons for Elementor. Install the plugin from WordPress.org, then come back to this guide when you configure it.