Title: LMDM Lightbox Image Caption Author: nicmare Published: June 15, 2026 Last modified: June 15, 2026 --- Search plugins ![](https://s.w.org/plugins/geopattern-icon/lmdm-lightbox-image-caption.svg) # LMDM Lightbox Image Caption By [nicmare](https://profiles.wordpress.org/nicmare/) [Download](https://downloads.wordpress.org/plugin/lmdm-lightbox-image-caption.1.0.0.zip) * [Details](https://wordpress.org/plugins/lmdm-lightbox-image-caption/#description) * [Reviews](https://wordpress.org/plugins/lmdm-lightbox-image-caption/#reviews) * [Installation](https://wordpress.org/plugins/lmdm-lightbox-image-caption/#installation) * [Development](https://wordpress.org/plugins/lmdm-lightbox-image-caption/#developers) [Support](https://wordpress.org/support/plugin/lmdm-lightbox-image-caption/) ## Description WordPress ships with a native Lightbox-Effect for image blocks. This plugin adds one tiny additional option to the core image and gallery blocks: `Show Caption`. When the toggle is enabled, the native lightbox receives the current image alt text as a `data-img-alt` attribute on the enlarged lightbox figure. A small frontend CSS then displays that value as a caption overlay inside the lightbox image. Please note: The caption text is taken from the image `alt` attribute. The toggle is only available when the native Lightbox-Effect is active. If the lightbox is disabled or the image is linked somewhere else, the caption option is disabled as well. ### Plugin Features ✔ adds a new toggle `Show caption` to the core Image block ✔ adds the same toggle to the core Gallery block ✔ the toggle can only be enabled when the native Lightbox- Effect is active ✔ ships with German translation files for the editor toggle ✔ uses the image `alt` attribute as value for `data-img-alt` ✔ adds the attribute only to the enlarged image figure in the lightbox ✔ supports galleries by passing the gallery setting to the nested image blocks ✔ outputs the value with a lightweight frontend CSS pseudo element ✔ uses no new block and does not replace the existing Image or Gallery blocks ## Installation 1. Upload the plugin files to the `/wp-content/plugins/lmdm-lightbox-image-caption` directory, or install the plugin through the WordPress plugins screen directly. 2. Activate the plugin through the **Plugins** screen in WordPress. 3. Open a post or page in the block editor. 4. Add or select an **Image** or **Gallery** block. 5. Enable the native Lightbox-Effect first. 6. Enable `Show caption` in the Lightbox panel. ## FAQ ### Does it create a new block? No, it only extends the existing core Image and Gallery blocks. ### Does it use the normal image caption field? No. It uses the image `alt` attribute and writes it to `data-img-alt` in the native lightbox overlay. ### Why is the toggle disabled? The toggle is only active when the native WordPress Lightbox-Effect is enabled. If the image links to a media file, attachment page or custom URL, the native lightbox is not active and the option is disabled. ### Does it work with galleries? Yes. Enable the native Lightbox-Effect for the gallery first and then enable `Show caption`. The setting is passed to the gallery images when the block is rendered. ### Does it load any additional assets in the frontend? Yes, it loads one small CSS file that displays the `data-img-alt` value as a pseudo element in the native lightbox overlay. ### What happens when i disable the plugin? The additional toggle and frontend caption output disappear. Existing Image and Gallery blocks continue to work as normal core blocks. ### Who is the author of the plugin? The WordPress-User “nicmare” vibe coded it. Means he had the idea of the plugin and uses AI to craft the code. ## Reviews There are no reviews for this plugin. ## Contributors & Developers “LMDM Lightbox Image Caption” is open source software. The following people have contributed to this plugin. Contributors * [ nicmare ](https://profiles.wordpress.org/nicmare/) [Translate “LMDM Lightbox Image Caption” into your language.](https://translate.wordpress.org/projects/wp-plugins/lmdm-lightbox-image-caption) ### Interested in development? [Browse the code](https://plugins.trac.wordpress.org/browser/lmdm-lightbox-image-caption/), check out the [SVN repository](https://plugins.svn.wordpress.org/lmdm-lightbox-image-caption/), or subscribe to the [development log](https://plugins.trac.wordpress.org/log/lmdm-lightbox-image-caption/) by [RSS](https://plugins.trac.wordpress.org/log/lmdm-lightbox-image-caption/?limit=100&mode=stop_on_copy&format=rss). ## Changelog #### 1.0.0 * first release of the plugin * added German translation files for the editor toggle ## Meta * Version **1.0.0** * Last updated **1 day ago** * Active installations **Fewer than 10** * WordPress version ** 6.9 or higher ** * Tested up to **7.0** * PHP version ** 8.0 or higher ** * Tags * [caption](https://wordpress.org/plugins/tags/caption/)[gallery](https://wordpress.org/plugins/tags/gallery/) [image](https://wordpress.org/plugins/tags/image/)[lightbox](https://wordpress.org/plugins/tags/lightbox/) [LMDM](https://wordpress.org/plugins/tags/lmdm/) * [Advanced View](https://wordpress.org/plugins/lmdm-lightbox-image-caption/advanced/) ## Ratings No reviews have been submitted yet. [Your review](https://wordpress.org/support/plugin/lmdm-lightbox-image-caption/reviews/#new-post) [See all reviews](https://wordpress.org/support/plugin/lmdm-lightbox-image-caption/reviews/) ## Contributors * [ nicmare ](https://profiles.wordpress.org/nicmare/) ## Support Got something to say? Need help? [View support forum](https://wordpress.org/support/plugin/lmdm-lightbox-image-caption/)