1. Go to the Fractal server & log in: https://fractal-beta.mls.uzh.ch/

The data in the Vizarr viewer is only accessible to people that are signed in to the Fractal server. Otherwise, you can get an error like this: I get an Error: server replied with "Node not found: v3 array or group" when loading the resource

1. Explore example datasets: I want to see an example dataset
2. Look at your own dataset by changing the URL according to instructions here: What's the structure of the paths in the URL?

More direct ways of opening the vizarr viewer directly from Fractal web will be coming soon.