When a WordPress theme or image-size requirements change, existing thumbnails may need to be regenerated for the current layout. reGenerate Thumbnails Advanced Pro lets you select what to process, follow the run, and manage documents or media entries that are no longer needed.

Set the regeneration scope

Choose whether to process featured images only, select the thumbnail sizes to regenerate, and set the preferred image quality. You can add any number of additional thumbnail sizes to the list. Pro also lets you choose an interval covering the last day, last week, last month, all images, or a custom interval.

Track the run and resume

A progress bar shows the percentage of images processed. When regeneration finishes, statistics display the total number of thumbnails regenerated. If you pause the process or the browser tab closes unexpectedly, Resume can continue from where it stopped.

Use Pro tools for larger libraries and cleanup

• Regenerate thumbnails with WP-CLI, which is useful for very large image libraries or when wp-admin resources are limited.
• Automatically remove outdated thumbnail files that are no longer used.
• Choose whether to delete metadata for missing images and thumbnails.
• Remove images and thumbnails from the media library when their files no longer exist on disk, along with the associated metadata.
• Automatically start image optimization with ShortPixel Image Optimizer after thumbnail regeneration.

When to use it

Run regeneration after switching themes or changing image-size requirements. An interval can narrow the work to a recent period or a custom group instead of processing the entire library. For a website using ShortPixel Image Optimizer, the automatic optimization option starts that step after regeneration.