An open-source, web-based viewer for zoomable images, implemented in pure JavaScript.

See it in action and get started using it at https://openseadragon.github.io/.

See the GitHub releases page.

The official OpenSeadragon course is now live! Taught by @iangilman, creator and maintainer, this is your best introduction to working with OpenSeadragon, from basic concepts to coordinate systems, animation, and beyond.

Learn more at: https://www.newline.co/courses/openseadragon-deep-dive

If you want to use OpenSeadragon in your own projects, you can find the latest stable build, API documentation, and example code at https://openseadragon.github.io/. If you want to modify OpenSeadragon and/or contribute to its development, read the contributing guide for instructions.

OpenSeadragon is released under the New BSD license. For details, see the LICENSE.txt file.

We are grateful for the (development or financial) contribution to the OpenSeadragon project.