Big Blue Meeting allows you to convert and download any
First login to any account in Big Blue Manager.
On the left-hand menu, click BigBlueButton / API.
Then click GUI and API Settings.
Finally choose a file to upload, it should ideally be a PDF with blank pages left at the end that act as a whiteboard.
Upload the file by pressing SAVE SETTINGS on the top-right or the bottom of the page.
You can then click the TEST AS USER or TEST AS MODERATOR button to see the result in BigBlueButton.