Dabuuker

Show content in a modal after page load.
Usage:
Select ‘SN Popup’ from the admin menu, then Add New. Type a name for the popup and insert any content you like. If you’re done, click Publish.
Now find a page or post you’d like to see the popup on and edit it. There should be a new metabox called ‘SN Popup’, choose the settings you want and hit Update, then view your page.
Video: https://www.youtube.com/watch?v=t6lt6v3fuEQ
To change the styling of the modal, you can override its styles in your theme’s css. Or for more advanced styling you can dequeue the default css and replace it with your own.
For reference, the default unminified version of the css is located at /plugins/sn-popup/vendor/featherlight-1.3.4/src/featherlight.css
To dequeue the old css and enqueue your own, add something like this to your functions.php:
<pre><code>add_action('wp_enqueue_scripts','remove_featherlight_css'); function remove_featherlight_css(){ wp_dequeue_style('sn-featherlight'); wp_enqueue_style('featherlight-new-css','/path-to-new-css'); } </code></pre>

Soronet Popup

bradvin

fooplugins

steveush

FooBox adds a lightbox to your WordPress site, so images are loaded in a modal or popup instead of redirecting your visitors away from your site.
Some people often refer to a lightbox as an “Image Zoom” effect. It’s really just a modal overlay or popup that showcases your images.
FooBox was the first lightbox to take responsive layout seriously. Not only does it scale images to look better on phones, but it rearranges it’s button controls to look great in both portrait or landscape orientation.
Add a modal popup to your website images with no setup. FooBox will automatically add modals to WordPress galleries, WordPress images with captions, and attachment images.
NEW: Auto Link Existing Images
Have older posts with images that do not open in FooBox? That is probably because those images were inserted without linking to the full-size media file. 
Enable Auto Link Existing Images and FooBox will automatically wrap unlinked WordPress attachment images on the frontend, so visitors can open them in the lightbox without you editing old content.
Works with most image gallery plugins, but works best with our <a href="https://fooplugins.com/foogallery-wordpress-gallery-plugin/" rel="nofollow ugc">FooGallery Gallery WordPress Plugin</a>.
FULL GUTENBERG SUPPORT
Within Gutenberg, FooBox lightbox will automatically add a modal popup to images and galleries that have the “Link To” setting set to “Media File”. 
Image captions set in the editor are also automatically picked up in the FooBox modal popup.
FooBox Image Lightbox Features:
<ul>
<li>Responsive lightbox design</li>
<li>Modern lightbox design</li>
<li>Zero configuration!</li>
<li>Works with WordPress galleries</li>
<li>Works with WordPress captioned images</li>
<li>Auto links older unlinked WordPress attachment images</li>
<li>Control when to exclude / include FooBox JS & CSS assets</li>
</ul>
Includes a 7-day free trial of FooBox Pro Lightbox!
You can try the PRO version for free for 7 days.
<a href="https://fooplugins.com/foobox/?utm_source=fooboxfreeplugin&utm_medium=fooboxfreeprolink&utm_campaign=foobox_free_wprepo" rel="nofollow ugc">FooBox PRO</a> Features:
<ul>
<li>Social sharing (10+ networks)</li>
<li>Video lightbox support</li>
<li>HTML lightbox support</li>
<li>iFrame support</li>
<li>Deeplinking</li>
<li>Fullscreen and slideshow modes</li>
<li>Glass lightbox theme (including custom color pickers)</li>
<li>Metro lightbox theme</li>
<li>Flat lightbox theme</li>
<li>5 color schemes, 12 button icons and 11 loader icons</li>
<li>12 animation effects</li>
<li>85+ settings to customize</li>
</ul>
<a href="https://fooplugins.com/foobox/?utm_source=fooboxfreeplugin&utm_medium=fooboxfreeprolink&utm_campaign=foobox_free_wprepo" rel="nofollow ugc">FooBox PRO</a> Works With:
<ul>
<li><a href="https://fooplugins.com/foogallery-wordpress-gallery-plugin/" rel="nofollow ugc">The Best Image Gallery Plugin for WordPress</a></li>
<li>NextGen</li>
<li><a href="https://codecanyon.net/item/justified-image-grid-premium-wordpress-gallery/2594251" rel="nofollow ugc">Justified Image Grid</a></li>
<li>Envira Gallery</li>
<li>WooCommerce product images (Works with WooCommerce v3+)</li>
<li>JetPack Tiled Gallery</li>
<li>AutOptimize</li>
</ul>
Check out the <a href="https://fooplugins.com/foobox-feature-comparison/?utm_source=fooboxfreeplugin&utm_medium=fooboxcomparelink&utm_campaign=foobox_free_wprepo" rel="nofollow ugc">full feature comparison</a>.
Complete FooBox Asset Control
By default, FooBox lightbox includes javascript and stylesheet assets into all your pages. We do this, because we do not know if the page content contains media or not. 
If you want more control over when FooBox assets are included, you can now exclude the assets by default, by enabling a setting. Then on each page, you can choose to include them when required. 
Alternatively, you can leave the setting disabled, and then choose to exclude the FooBox assets from particular pages. A new metabox is now available when editing your pages or posts. 
This new feature was only available in the PRO version beforehand, but we feel control over your website performance is something you should not have to pay for. Enjoy!
Translations
<ul>
<li><a href="https://www.webhostinghub.com/" rel="nofollow ugc">Serbo-Croatian by Borisa Djuraskovic</a></li>
</ul>

Lightbox & Modal Popup WordPress Plugin – FooBox


it´s easy to get going right after the install! not too complex as I am needing it for "single" images to lightbox! really excellent!!!!!!


wonderful!

stops working after 7 days


FooBox works great ouf of the box (pun intended) and is well-suited for sites that need a quick image lightbox plugin that plays well with others.



The default lightbox theme provided is professionally made and well-suited for showcasing screenshots, portfolio items, photography, and more.



If you need more layout choices and compatibility with even the peskiest lightbox plugins, please check out Pro, as it's the only license I don't hesitate to renew.


FooBox is fantastic

A responsive image lightbox for WordPress galleries, WordPress attachments & FooGallery

Soronet Popup vs Lightbox & Modal Popup WordPress Plugin – FooBox