Description
ImgOptimizer helps you reduce Media Library image sizes without changing image attachment IDs.
- Process JPEG and PNG images in batches.
- Resize images that exceed configured dimensions.
- Recompress JPEG images at a configurable quality.
- Recompress PNG images while preserving transparency.
- Convert PNGs to JPEG only when no transparency is detected.
- Process a single image or selected Media Library images.
- Optionally process new image uploads.
PNG-to-JPG conversion changes the image URL extension. Keep the original PNG until you have checked affected pages, especially when a page builder stores image URLs in custom data.
License
This plugin is licensed under the GPL-2.0-or-later license.
Installation
- Upload the plugin ZIP through Plugins > Add New > Upload Plugin.
- Activate the plugin.
- Go to Tools > Image Optimizer to configure settings and process images.
FAQ
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Are transparent PNGs converted to JPG?
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No. JPG cannot preserve transparency, so the plugin skips PNGs where transparency is detected.
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Does the plugin delete the original PNG?
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No, not by default. Enable that option only after verifying your site uses the new JPG URLs correctly.
Reviews
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Contributors & Developers
“ImgOptimizer & PNG to JPG” is open source software. The following people have contributed to this plugin.
Contributors
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Interested in development?
Browse the code, check out the SVN repository, or subscribe to the development log by RSS.
Changelog
1.1.3
- Declare compatibility with WordPress 7.1.1.
- Align the plugin name and text domain with the plugin slug.
1.1.2
- Enqueue admin JavaScript and CSS through WordPress APIs.
- Use uniquely prefixed plugin identifiers.
- Prevent duplicate automatic-processing jobs during metadata regeneration.