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Would be great if you also had the schema / file format information as well on the site.

Agreed. We're considering doing more along these lines, such as generating the Hive DDL. So you would like to browse the schema, e.g. under Contents?

Awesome! Yup would like to browse the schema.

What type of representation would be most useful for schema information? Avro?

That or just a basic visual editor is fine too. Goal is to just know what I'm getting before getting it in more detail.