This tool allowed you to download PurpleAir sensor data in CSV format for selected sensors.
Important announcement
PurpleAir migrated it's data to Google's BigQuery as the background storage instead of ThingSpeak.com.
As a result, this tool is no longer supported and has been retired.
There are now two ways to get data from your sensor.
Using the map: After clicking on a sensor and with the graph visible, click the "hamburger" menu button in the top right of the graph. Choose a download option to download the data used in that graph.