Demis Patti

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cbParallax lets you add custom background images with a vertical or horizontal parallax effect to your WordPress site. You can set a single background for the entire site or configure individual backgrounds for each post, page, or product.
Features:
<ul>
<li>Background image with smooth parallax scrolling effect</li>
<li>One image for all pages or individual backgrounds per page/post</li>
<li>Works vertically and horizontally</li>
<li>Various overlay patterns to choose from</li>
<li>Color overlay with opacity control</li>
<li>Boxed layout option with customizable margins</li>
<li>Mobile device detection with option to disable parallax on mobile</li>
<li>Compatible with WooCommerce products</li>
</ul>
Requirements:
<ul>
<li>Your theme must support the WordPress <a href="https://developer.wordpress.org/themes/functionality/custom-backgrounds/" rel="nofollow ugc">Custom Backgrounds</a> theme feature</li>
<li>For parallax effect, images should be at least 1920px x 1200px</li>
<li>PHP 8.0 or higher</li>
</ul>
<h3>Privacy Policy</h3>
This plugin does not collect, store, or transmit any personal data. All settings are stored locally in your WordPress database.

cbParallax

Custom background images with parallax effect for posts, pages and products.

Schwarttzy

Featured Background is a lightweight WordPress plugin that lets you set a custom background image for specific posts or pages using the built-in featured image functionality. Now enhanced with expanded options for customization, parallax effects via CSS, overlay colors, custom post type support, Gutenberg sidebar integration, and UI improvements.
<h4>Key Features</h4>
<ul>
<li>Expanded Background Options: Customize position, repeat, size, attachment, and fallback color.</li>
<li>Parallax Effect: Simple CSS-based parallax (using fixed attachment) with an optional toggle.</li>
<li>Overlay Color and Opacity: Add a semi-transparent overlay for better text readability.</li>
<li>Custom Post Type Support: Enable the meta box on any public CPT via a settings page.</li>
<li>Gutenberg Integration: Dedicated plugin sidebar in the block editor for seamless configuration.</li>
<li>UI Improvements: Added “Remove Image” button and live preview in the meta box.</li>
<li>Simple Integration: Easily upload or select an image via the WordPress media library.</li>
<li>Automatic CSS Injection: Injects inline CSS into the header with options applied to the <code>body</code> element.</li>
<li>Admin Preview: Live preview in the editor.</li>
<li>Secure and Efficient: Nonces, sanitization, conditional enqueuing.</li>
<li>Clean Uninstall: Removes all data on deletion.</li>
<li>Modern Compatibility: Tested with WordPress 6.8.2 and PHP 8+.</li>
</ul>
Ideal for personalizing backgrounds per page. The CSS includes comments for identification.
Report issues on the <a href="https://wordpress.org/support/plugin/featured-background/" rel="ugc">support forum</a>.

Featured Background

Plugin written by a newbie

Set a featured image as the background for individual posts or pages with advanced options like parallax, overlays, and more.

cbParallax vs Featured Background