ftmpub

This plugin simplifies the process of linking media attachments to products in WooCommerce. Upload a CSV file containing two columns — the first can be a numeric media ID or a file name, and the second must be the WooCommerce product ID — and the plugin will resolve each entry, display a preview of the associations to be created with checkboxes for individual selection, and attach the files on confirmation. It detects the CSV delimiter automatically, skips blank header lines, and informs you of the detected separator. You can choose to set the media as the featured image for products that lack a thumbnail. If necessary, undo the most recent import with a single click. A downloadable template CSV file is provided for convenience.
For more info, visit <a href="https://ftmpub.ch/easy-product-media-linker/" rel="nofollow ugc">FTMPUB.ch</a>
<h3>Usage</h3>
<ul>
<li>Prepare a CSV file with two columns: the first can be a numeric media ID or a file name, and the second must be the WooCommerce product ID. The plugin will detect common separators (comma, semicolon, tab or pipe) automatically.</li>
<li>Go to Easy Product Media and upload your CSV file using the Import Associations form. If needed, download the provided template to see the required format.</li>
<li>Review the preview table: each row displays the product, original media reference and resolved media. Use the checkboxes to select only the rows you want to process or click Select All to toggle them all. Where media cannot be resolved automatically, choose from matching attachments via the dropdown or use the search button to open the WordPress media modal.</li>
<li>Adjust unresolved media entries as needed and click Confirm Import to create the associations. Optionally check the featured image checkbox when uploading to set the media as the product thumbnail if none exists.</li>
<li>To undo the last import, use the Undo Last Import section. Only the most recent batch can be reverted.</li>
</ul>
<h3>Support</h3>
For help or feedback, visit: 
<a href="https://ftmpub.ch/easy-product-media-linker/" rel="nofollow ugc">FTMPUB.ch</a>

Easy Product Media Linker

Bulk attach media to WooCommerce products via CSV import with preview, search, featured image option, and undo.

Toro_Unit (Hiroshi Urabe)

<a href="https://wordpress.org/plugins/really-simple-csv-importer/" rel="ugc">Really Simple CSV Importer</a> Add-on.
Media’s URL (Images, Documents… etc) in CSV, Download Media and Convert url to attachment ID.

RS CSV Importer Media Add-On

Really Simple CSV Importer Add-on. Media's URL (Images, Documents... etc) in CSV, Download Media and Convert url to attachment ID.

Easy Product Media Linker vs RS CSV Importer Media Add-On