Title: IIIF Deep-Zoom Before/After Block
Author: Pixy Puala
Published: <strong>October 2, 2025</strong>
Last modified: October 2, 2025

---

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# IIIF Deep-Zoom Before/After Block

 By [Pixy Puala](https://profiles.wordpress.org/pixypuala/)

[Download](https://downloads.wordpress.org/plugin/iiif-deep-zoom-before-after-block.1.0.0.zip)

 * [Details](https://wordpress.org/plugins/iiif-deep-zoom-before-after-block/#description)
 * [Reviews](https://wordpress.org/plugins/iiif-deep-zoom-before-after-block/#reviews)
 *  [Installation](https://wordpress.org/plugins/iiif-deep-zoom-before-after-block/#installation)
 * [Development](https://wordpress.org/plugins/iiif-deep-zoom-before-after-block/#developers)

 [Support](https://wordpress.org/support/plugin/iiif-deep-zoom-before-after-block/)

## Description

This block is purpose-built for galleries, museums, restoration projects, cartography,
and microscopy.
 Paste two IIIF endpoints (either **Image API `info.json`** or **
manifests v2/v3**) and get a deep-zoom comparison with lockstep pan/zoom.

**Features**
 * Synchronized pan/zoom using OpenSeadragon (bundled, BSD-3-Clause)*
Accepts IIIF Image API `info.json` or IIIF Manifests (v2/v3) * Draggable reveal 
slider + accessible range input * Labels (e.g., “Before” / “After”), start position,
and optional badges * Align wide/full support; server-side render with sanitized
output * No tracking, no external calls beyond the IIIF URLs you provide

**Privacy**
 This plugin does not collect, store, or transmit personal data.

## Screenshots

[[

## Blocks

This plugin provides 1 block.

 *   IIIF Deep-Zoom Before/After Compare two IIIF (tiled) images with synchronized
   pan/zoom using OpenSeadragon.

## Installation

 1. Upload the `iiif-deep-zoom-before-after-block` folder to `/wp-content/plugins/`.
 2. Ensure `blocks/iiif-before-after/lib/openseadragon/` contains `openseadragon.js`
    and `openseadragon.min.js`.
 3. Activate the plugin through **Plugins  Installed Plugins**.
 4. In the block editor, insert **IIIF Deep-Zoom Before/After**.
 5. In the sidebar, paste two IIIF URLs (either `.../info.json` or a manifest URL).

## FAQ

### What IIIF sources are supported?

 * IIIF Image API `info.json` (level 1/2/3) – recommended.
 * IIIF Presentation API manifests (v2 and v3). The block picks the first canvas’s
   first image automatically.

### Does it load assets on every page?

No. Scripts and styles are registered and only enqueued where the block appears.

### Is OpenSeadragon GPL-compatible?

Yes. OpenSeadragon is BSD-3-Clause, which is compatible with GPL.

## Reviews

There are no reviews for this plugin.

## Contributors & Developers

“IIIF Deep-Zoom Before/After Block” is open source software. The following people
have contributed to this plugin.

Contributors

 *   [ Pixy Puala ](https://profiles.wordpress.org/pixypuala/)

[Translate “IIIF Deep-Zoom Before/After Block” into your language.](https://translate.wordpress.org/projects/wp-plugins/iiif-deep-zoom-before-after-block)

### Interested in development?

[Browse the code](https://plugins.trac.wordpress.org/browser/iiif-deep-zoom-before-after-block/),
check out the [SVN repository](https://plugins.svn.wordpress.org/iiif-deep-zoom-before-after-block/),
or subscribe to the [development log](https://plugins.trac.wordpress.org/log/iiif-deep-zoom-before-after-block/)
by [RSS](https://plugins.trac.wordpress.org/log/iiif-deep-zoom-before-after-block/?limit=100&mode=stop_on_copy&format=rss).

## Changelog

#### 1.0.0

 * Initial release.

## Meta

 *  Version **1.0.0**
 *  Last updated **10 months ago**
 *  Active installations **Fewer than 10**
 *  WordPress version ** 6.4 or higher **
 *  Tested up to **6.8.6**
 *  PHP version ** 8.1 or higher **
 * Tags
 * [before after](https://wordpress.org/plugins/tags/before-after/)[comparison](https://wordpress.org/plugins/tags/comparison/)
   [iiif](https://wordpress.org/plugins/tags/iiif/)[images](https://wordpress.org/plugins/tags/images/)
 *  [Advanced View](https://wordpress.org/plugins/iiif-deep-zoom-before-after-block/advanced/)

## Ratings

No reviews have been submitted yet.

[Your review](https://wordpress.org/support/plugin/iiif-deep-zoom-before-after-block/reviews/#new-post)

[See all reviews](https://wordpress.org/support/plugin/iiif-deep-zoom-before-after-block/reviews/)

## Contributors

 *   [ Pixy Puala ](https://profiles.wordpress.org/pixypuala/)

## Support

Got something to say? Need help?

 [View support forum](https://wordpress.org/support/plugin/iiif-deep-zoom-before-after-block/)