RSVPify data exports are provided in a standard .csv spreadsheet file. Unlike other leading web browsers, Safari opens .csv files directly in the browser (which can look like a jumbled mess!) rather than downloading them to a .csv file on your machine.
Here's how to get your spreadsheet in a readable format...
Option 1: Use another web browser
Login and download your data export from another web browser like Chrome or Firefox.
Option 2: Save your export from Safari to your hard drive
In RSVPify, export to spreadsheet (you'll see the raw data file within your browser window)
Save the raw data file to your machine by COMMAND + S
Open the speadsheet file in your preferred spreadsheet software, or upload it to a free spreadsheet program like Google Sheets