Compare two ultra-high-resolution IIIF images with a draggable before/after reveal and synchronized pan/zoom, powered by OpenSeadragon.

IIIF Deep-Zoom Before/After Block

This block is purpose-built for galleries, museums, restoration projects, cartography, and microscopy. 
Paste two IIIF endpoints (either Image API <code>info.json</code> 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 <code>info.json</code> or IIIF Manifests (v2/v3) 
* Draggable reveal slider + accessible range input 
* Labels (e.g., &#8220;Before&#8221; / &#8220;After&#8221;), 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.

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