✂️3. Resizing Existing Images
If you have already images uploaded to your WordPress media library follow the steps below to bulk-resize them.
To resize existing images, you'll need to install the Regenerate Thumbnails in order to process images in bulk. To do so, in your WordPress admin, go the Plugins menu → Add New.
In the search box, type regenerate thumbnails, and click the button "Install Now", then "Activate".

Once the plugin is activated, go the Tools menu → Regenerate Thumbnails.

Finally, click the button "Regenerate thumbnails for all attachments" to start processing your images.

To resize existing images in bulk, you’ll need to install the ReThumbify plugin. Here’s how to get started:
Navigate to your WordPress admin dashboard.
Click on the "Plugins" menu.
Select "Add New".
Click "Upload Plugin" at the top.
Select rethumbify.zip
Click "Install Now".
Once installed, click "Activate".
Navigate to Tools > ReThumbify
Click the "Start Regeneration" button to start processing your images.

How to check resized images?
To view resized images, go to your media library under Media → Library, then apply the filter "Smart Resize: Processed".

How can I regenerate thumbnails for a single image?
Yes, you can regenerate thumbnails for a single image by clicking the link "Regenerate Thumbnails" in your media library.
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