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Force Regenerate Thumbnails

By Shane Bishop

Site Administration & Utilities / Site Migration & Cloning

Reviewed by Omar Dabbas

Trusted WordPress expert with 20+ years of experience evaluating plugins for the WP ecosystem.

Force Regenerate Thumbnails Review - In-Depth Analysis

Easily delete old image sizes and regenerate thumbnails for your uploads. Manage thumbnail regeneration from the admin menu or media library.

Performance Overview

WPS Score

7.06/10

User Rating

4.7/5 (based on 186+ reviews)

Active Installations

200,000+

Update Frequency

Average It is calculated using the weighted average of same category plugins.

Security Score

1 / 10 (Very Low Risk) It is calculated using the weighted average of all versions.

What It Does

Force Regenerate Thumbnails allows you to delete all old images sizes and REALLY regenerate the thumbnails for your uploads.

Regenerate all thumbnails from the Tools admin menu. Regenerate batches of images via the Media Library list mode. Select the images to regenerate and then use the Bulk Actions drop-down menu to Force Regenerate Thumbnails. Use attachment actions to regenerate thumbnails for a single image.

Several filters exist for advanced usage. See more via this gist.

You may report security issues through our Patchstack Vulnerability Disclosure Program. The Patchstack team helps validate, triage and handle any security vulnerabilities. Report a security vulnerability.

Comparing to Alternatives

Force Regenerate Thumbnails sits among several established thumbnail regeneration tools on WordPress.org. It stands out for reliability with large media libraries, though a few alternatives offer different workflow approaches worth considering.

Top alternatives

Strengths

Reliably deletes outdated thumbnails and regenerates only the currently registered sizes
Handles very large media libraries where other regeneration tools reportedly freeze or fail
Appears to repair broken image metadata as a side benefit
Straightforward one-click operation with no complex setup required

Weaknesses

Can struggle or throw errors partway through extremely large batches (30,000+ images)
Verbose logging interface can become laggy and hard to scroll through on big jobs
No built-in option to export logs or hide detailed output

User Sentiment Analysis

With 185 ratings and an overall score of 4.7/5, sentiment is strongly positive—88.1% of users gave 5 stars. Only 7.6% left 1 or 2 star reviews, suggesting the plugin performs its core task well for the vast majority of users.

Positive highlights

Andrew called it 'a great plugin' that does exactly what it's supposed to, even across 20,000 images
koultti said it 'literally saved my website' after struggling with over 100,000 unnecessary thumbnails on a 50,000-product store
barnabas1 praised it for fixing 'bad looking woocommerce thumbnails' generated with wrong dimensions
stefansic noted it 'has saved my life' by regenerating registered sizes, deleting unregistered ones, and repairing metadata
manuamaro and matutino both confirmed it successfully restored missing images after a site migration

Common complaints

Processing very large libraries (around 38,000 images) can stall after only 50-60 images with recurring, inconsistent errors

Weaknesses

Some large-scale batch jobs report errors that halt the regeneration process entirely
The logging display isn't optimized for very large jobs, causing UI lag

Who Should Use This?

Best for

Site owners who need to regenerate thumbnails after a theme change, migration, or misconfigured image sizes will find this plugin effective and easy to use. It's particularly valued by WooCommerce store owners and those cleaning up bloated media libraries.

Not ideal for

Users with extremely large media libraries (tens of thousands of images) should be prepared for potential errors or interruptions during batch processing, and may need to run the process in smaller stages or pair it with complementary tools.

Pricing & Value

Free version includes

The free version provides full thumbnail regeneration functionality, including deleting outdated thumbnails, creating new ones for registered sizes, and repairing image metadata—covering the complete use case for most users at no cost.

Final Verdict

Force Regenerate Thumbnails earns its strong 4.7/5 rating by doing one job reliably: regenerating and cleaning up WordPress image thumbnails. Users consistently praise it for succeeding where other regeneration plugins failed, especially after migrations, theme changes, or WooCommerce dimension issues. With zero known vulnerabilities and a clean security history, it's a safe, low-risk choice for routine media maintenance.

The main caveat is scale—some users with tens of thousands of images report errors that interrupt the process, and the logging interface isn't well suited for very large jobs. For typical sites, however, this remains one of the most trusted free options in its category, and its lack of a paid tier means there's no upsell friction to worry about.