OpenSeadragonizer is a photos chrome extension. it's a free extension , it has 1,000+ active users since released its first version, it earns an average rating of 4.71 from 7 rated user, last update is 1480 days ago.
OpenSeadragonizer adds the "View in OpenSeadragon" entry in the context menu of an image. When selected, the image is then displayed in an OpenSeadragon viewer, allowing easy zoom and pan.
You could download the latest version crx file or older version files and install it.
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100% user give 5-star rating. Read reviews of openseadragonizer
You could find more help information from openseadragonizer support page.
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Keep the good work
OSD is the bees knees!