NsThemes

Apply your watermark on your WooCommerce product images — without overwriting them!
NS Watermark For WooCommerce overlays a watermark image on top of your shop and single-product photos at display time. 
The original files stored in your Media Library are never modified.
Features (free version)
<ul>
<li>Choose any image from your Media Library as the watermark.</li>
<li>Always show the watermark, or show it only to guests (not logged-in users).</li>
<li>Enable / disable with a single setting.</li>
<li>Compatible with WordPress 7.0 and WooCommerce 10.8.1.</li>
<li>No GD extensions need to be installed separately (bundled with PHP ≥ 7.4).</li>
</ul>
3rd Party / External Services
<ul>
<li>PluginEye — used for opt-in usage tracking (plugin activation/deactivation events, site address, WordPress version, active plugin list). Data is collected only after explicit user consent is given on the opt-in screen shown at first activation. Read more: <a href="https://www.plugineye.com/privacy-policy/" rel="nofollow ugc">Privacy Policy</a> — <a href="https://www.plugineye.com/terms-of-service/" rel="nofollow ugc">Terms of Service</a>. This service is provided by NsThemes.</li>
</ul>
All watermark image processing is performed locally on your web server using PHP’s built-in GD library. No image data is sent to external servers.

NS Watermark For WooCommerce

Protect your WooCommerce product images by overlaying a watermark on-the-fly — no permanent changes to your files.

bdiskind

Great for product image management in WooCommerce! 
This plugin adds a column to the product listing in WooCommerce with links to upload and delete product images. 
Uses AJAX – the page does not refresh and there is no need to edit each product individually. 
Just click the “Set Image” link and find or upload an image. 
Changes are instantly reflected on front-end – no need to press “update” button. 
Saves a tremendous of time!

Quick Product Image Upload

Easily upload and delete product images on main product screen, without having to edit each product.

NS Watermark For WooCommerce vs Quick Product Image Upload