Choose a file, or create a to start.
There is a saved session, if needed.
Double-click on the map or to add a point.
Download the result or download filtered.
Filter:
Either key name, or key=full_match, or key:partial_match. Prefix with "-" to negate.
Properties:
Format is "key value", separated with a space. If a key contains spaces, enclose it in double quotes.