How to use:

Export 2FAS file backup without password first.

• Select the file and show QR code here
  
  
  
  
  
• Or rename to "Backup.2fas" and put along with this HTML, add data= at the beginning of the backup file, like :
  
  data={"appVersionCode":...
  
  
• Or copy its content into this HTML if you really want to have a single file to show the codes (e.g. display in iOS Files app, maybe?)

Use this viewer at your own risk.