Dropbox lets you preview more file types without having to download
 

If you've ever received a ZIP or RAR file in Gmail, you'll have noticed that you can peek to see what's inside without having to download the file. If you've been hoping for a similar feature elsewhere, you're in luck: Dropbox has updated how it hand...

https://www.engadget.com/2018/06/18/...owerpoint-pdf/