gazchap

<p>By default, WooCommerce will only show thumbnails for categories if the category has a thumbnail set.</p>
<p>This plugin changes this behaviour so that WooCommerce will hunt for a product thumbnail in the category being displayed, and use that instead.</p>
<p>Upon activation, the plugin will configure itself with the basic settings. Any categories that you have on your WooCommerce store that do not have a thumbnail set will then start displaying any available product thumbnails inside the category.</p>
<p>There are a number of options, these can be found in WooCommerce -> Settings -> Products -> Auto Category Thumbnails.</p>
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<p>Thumbnail Size sets the image size that the plugin should use when displaying the thumbnails. Defaults to shop_thumbail, but shop_catalog may be a better option for some themes.</p>
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<p>Go into Child Categories makes the plugin look in child categories too, useful if you have products buried in quite a deep category structure.</p>
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<p>Random Thumbnail tells the plugin to pick a random product thumbnail from those it finds every time the page loads – otherwise it always uses the first one it finds.</p>
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<p>Use Transients tells the plugin to save the thumbnail it picks for a category as a transient in WordPress, so that it won’t have to do it again while the transient is still active. This can hugely increase performance on sites with many categories, so is enabled by default.</p>
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<p>Transient Expiry is the length of time each transient is active for before the site picks another thumbnail for the category. By default it is set to 1 day.</p>
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<p>Custom Transient Expiry can be used to define your own transient expiry period (in seconds) if none of the pre-defined options are suitable.</p>
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<p>Exclude Thumbnail IDs accepts a comma-separated list of attachment IDs from the WordPress Media Library. The plugin will never use any thumbnail with one of these IDs for a category.</p>
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<h3>License</h3>
<p>Licensed under the <a href="http://www.gnu.org/licenses/gpl-2.0.html" rel="nofollow ugc">GNU General Public License v2.0</a></p>


GazChap's WooCommerce Auto Category Product Thumbnails

Pick WooCommerce category thumbnails automatically from products contained within those categories.

Adi Glibanović

<p>The Selective Thumbnail Regenerator plugin provides a powerful and user-friendly way to regenerate image thumbnails for WordPress media libraries. Unlike other thumbnail regeneration plugins that blindly process the entire library, this plugin gives you precise control: choose a specific year, month, and even a title keyword to target exactly the images you need.</p>
<h4>Key Features</h4>
<ul>
<li><strong>Date & Title Filters</strong> – Choose a specific year, month, or search by title to target only the images you need.</li>
<li><strong>Month Status Calendar</strong> – A visual 4×3 calendar grid appears when you select a year. Months that have been regenerated are highlighted in green with a checkmark. Clicking a month badge automatically selects it.</li>
<li><strong>Regeneration History Tracking</strong> – Completed months are stored in the database and persist across sessions. A “Reset History” button clears all records when needed.</li>
<li><strong>Thumbnail Size Selection</strong> – Choose specific registered thumbnail sizes to regenerate instead of all sizes.</li>
<li><strong>Configurable Batch Size</strong> – Set how many images are processed per AJAX request (1-20).</li>
<li><strong>Throttle Delay Control</strong> – Set a cooldown pause between batches (0-2000 ms) to reduce server load.</li>
<li><strong>Dry Run Mode</strong> – Preview which images would be processed without writing any changes to disk.</li>
<li><strong>Automatic Batch Failure Recovery</strong> – If a batch crashes, the plugin retries each image individually, isolates the bad one, logs it, and continues with the rest.</li>
<li><strong>Failed Images Log</strong> – Detailed table of all failed images including ID, title, and exact failure reason.</li>
<li><strong>Orphaned File Cleanup</strong> – Old thumbnail files are deleted from disk before new ones are generated.</li>
<li><strong>Live Terminal Activity Log</strong> – Real-time monospace console with timestamped status messages.</li>
<li><strong>Visual Completion Metrics</strong> – Five-card summary board: Processed, Successful, Failed, Skipped, Duration.</li>
<li><strong>Cancel Support</strong> – Stop the regeneration at any time with a graceful shutdown.</li>
<li><strong>Performance Optimized</strong> – Direct indexed SQL query for year selector loading.</li>
</ul>
<h3>Usage</h3>
<ol>
<li>Navigate to Tools > Selective Thumbnail Regenerator.</li>
<li>Select a year from the dropdown. A Month Status Calendar will appear showing which months have already been regenerated.</li>
<li>Optionally select a month – via the dropdown or by clicking a month badge on the calendar.</li>
<li>Optionally enter a title keyword to filter images by name.</li>
<li>Adjust batch size and throttle delay in the Performance Configuration card.</li>
<li>Enable Dry Run Mode to preview results without making changes.</li>
<li>Click “Scan Matching Images” to count how many images match your filters.</li>
<li>Click “Start Regeneration” to begin. Watch the live terminal log for real-time updates.</li>
<li>Review the Job Completion Report and Failed Images Log after the process ends.</li>
</ol>
<h3>Troubleshooting</h3>
<h4>“No images found for the selected period”</h4>
<p>There are no image attachments uploaded during the selected year/month. Try a different time period.</p>
<h4>The process is slow</h4>
<p>Reduce the throttle delay or increase the batch size if your server can handle more load. Alternatively, increase the delay and reduce batch size if you are getting timeouts.</p>
<h4>A batch keeps failing</h4>
<p>Enable Dry Run Mode first to verify image accessibility. If specific images crash the server, they will appear in the Failed Images Log after regeneration completes.</p>


Selective Thumbnail Regenerator

Regenerate thumbnails selectively by upload date and search filters with full history calendar, performance throttle, and fail-safe recovery.

GazChap's WooCommerce Auto Category Product Thumbnails vs Selective Thumbnail Regenerator