Tools

Excel to CSV Batch Converter

When you run this updated code and click "Sanitize & Convert All", keep an eye on the top-right corner of your browser window (near the address bar/star icon).

If the browser pauses mid-way, it will show a tiny icon that says "Automatic downloads blocked". Click that icon and change it to "Always allow multiple downloads from this site", and the rest of the 30 files will finish downloading instantly.