Xiangxu

Default Image Assistant allows you to assign a default featured image for each public post type in WordPress. 
If a post has no featured image set, the plugin automatically loads the default image you assigned.
Perfect for: 
* Blogs that require a fallback image 
* Custom post type archives 
* Editorial workflows 
* Sites with large content teams
Features: 
* Visual Media Library selector for each post type 
* Clean and modern card-style admin UI 
* One-click remove default image 
* No front-end bloat—only loads when needed 
* Works with all themes (including block themes)

Default Image Assistant

A lightweight tool that lets you assign default featured images for any post type using a simple media selector.

NsThemes

This plugin allow you to change WooCommerce default image for product simply by choose from your media gallery. 
Page option will appear in your WordPress backend menu, and here you can open the media gallery ad upload a new placeholder image. 
You only have to choose an image from your library or your local folder and select the image.
<iframe loading="lazy" class="youtube-player" width="750" height="422" src="https://www.youtube.com/embed/1uNruLmAVZ0?version=3&rel=1&showsearch=0&showinfo=1&iv_load_policy=1&fs=1&hl=en-US&autohide=2&wmode=transparent" allowfullscreen="true" style="border:0;" sandbox="allow-scripts allow-same-origin allow-popups allow-presentation allow-popups-to-escape-sandbox"></iframe>
PREMIUM FEATURES of NS Custom Placeholder Image for WooCommerce:
Choose a different placeholder per categories. 
Choose a different placeholder per tags.
For more information about PREMIUM VERSION, visit official page <a href="http://www.nsthemes.com/product/custom-placeholder-image-for-woocommerce/" rel="nofollow ugc">NsThemes Marketplace</a>.
We test our plugins with many other. If you find incompatibility with one specific plugin, please inform us at <a href="mailto:report@nsthemes.com" rel="nofollow ugc">report@nsthemes.com</a>.

NS Custom Placeholder Image for WooCommerce

With this plugin you can change WooCommerce image placeholder with no code required!

Default Image Assistant vs NS Custom Placeholder Image for WooCommerce