Blabr currently supports pasting a string of values (space-separated, or comma+space-separated) into a table column. (Conversely, if you copy a table column to the clipboard, its values are stored in the clipboard as a comma+space-separated string.) We plan to expand this functionality to support other import/export formats, including CSV and JSON.

Meantime, you can use the numericjs library's parseCSV function. Here's a quick example: http://blabr.io/?9219b0773716623aef5e