AJAX Thumbnail Rebuild vs ONet Regenerate Thumbnails (2026)
Detailed side-by-side comparison of two WordPress plugins, based on real-time data from WordPress.org.
ONet Regenerate Thumbnails
1.0K+ active installs
Free
Quick Verdict
As of April 2026, AJAX Thumbnail Rebuild has a higher user rating (4.8/5 from 90 reviews) and leads in active installations (30K+ vs 1.0K+). Both are free WordPress plugins. AJAX Thumbnail Rebuild has accumulated 851K+ total downloads while ONet Regenerate Thumbnails has 50K+.
Detailed Comparison
| Metric | AJAX Thumbnail Rebuild | ONet Regenerate Thumbnails | |
|---|---|---|---|
| Rating | 4.8/5 | ◄ | 4.5/5 |
| Total Reviews | 90 | ◄ | 11 |
| Active Installs | 30K+ | ◄ | 1.0K+ |
| Total Downloads | 851K+ | ◄ | 50K+ |
| Support Resolution | N/A | N/A | |
| Last Updated | 2 years ago | ◄ | 8 years ago |
| First Released | 2009 | 2013 | |
| Age | 17 years | 13 years | |
| WP Requires | 2.8+ | 3.5+ | |
| PHP Requires | false+ | false+ | |
| Business Model | Free | Free | |
| Latest Version | 1.14 | 1.5 |
Rating Breakdown
AJAX Thumbnail Rebuild
ONet Regenerate Thumbnails
Download Trends
Over the past 30 days, AJAX Thumbnail Rebuild averaged approximately 63 daily downloads while ONet Regenerate Thumbnails averaged 6.
Recent Reviews
AJAX Thumbnail Rebuild Reviews
Still Works Great!
With over 4K images on my site, it’s impossible to get “Regenerate Thumbnails” in Woocommerce to complete. This takes care of it in a couple hours without taking a break. Thank you! Running WordP
Seems to be a dead plugin
No replies to support queries for over a year so it seems like a dead plugin. hopefully you backup your site before trying this.
This should be in Core
This is a great plugin, easy to use and it should be in Core in some way or form. It’s ridiculous that Woo does automatic thumbnail regeneration, but WP Core doesn’t. Thanks for this.
ONet Regenerate Thumbnails Reviews
Great plugin, unique post editor feature
Works perfectly, the only plugin with regenerate specific thumbnails on post editor. Note to competitors:was is that hard to think about it? Note to author: Great work, you can make it king if you can
Doesn’t seem to work with 4.7.4
I’ve tried everything they say to do and this plugin unfortunately just does not seem to work with 4.7.4.
Doesnt have 4.4.1 support completely
Doesnt have 4.4.1 bulk generation support. But you can generate thumbnails one by one.
More Regenerate Worth Comparing
Top alternatives in the same category as AJAX Thumbnail Rebuild and ONet Regenerate Thumbnails
Optimize image sizes, regenerate thumbnails, enable retina, convert to WebP/AVIF, or use cloud optimization. An essential image toolkit.
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Advanced management for images, register new sub-sizes, sub-sizes details, regenerate and cleanup files.
Automatically regenerates your thumbnails on the fly when thumbnail sizes change.
Real Thumbnail Generator is a WordPress plugin for regenerating thumbnails. It is beginner-friendly, SEO-optimised and GDPR-compliant.
Frequently Asked Questions
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Plugin data sourced from WordPress.org. Comparison and analysis by PluginSift.