[deepsun]

Can I run it in a browser? Or I need Factorio installed to copy it there?

[exac]

Look at the tabs on the top. It generates the blueprints, but you can also see a link to a browser-render of the blueprint.

[leetrout]

You click "compile" in the top right then after the log outputs everything you go to the blueprint page and click "open in fbe".