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OpenSeadragon is a JavaScript library that allows users to annotate images. It is available also as OpenSeadragon plugin.
Get started quickly with minimal setup. Annotorious is client-only, with no server-side dependencies.
Create your own look & feel. Define data-driven styles. Plug in your own tooltip, popup and editor components.
A comprehensive JavaScript API that has everything you need to build your own, tailor-made annotation applications.
Annotorious works on desktop and mobile devices and supports touch interaction.