Using PPT Downloader
Find the deck and copy its address
Open the presentation on slideshare.net and copy the URL shown at the top of your browser. On mobile, tap Share → Copy in Safari or Chrome instead of using a shortened share link from an app.
https://www.slideshare.net/username/presentation-title
Paste it into PPT Downloader
On the PPT Downloader homepage, paste the link and press Fetch Slides or Enter. A preview appears with the title, the cover slide and the slide count, plus a slide-by-slide progress list.
Pick a format
Choose the file type that fits your plans:
Save and open your file
While the file is being built, the button shows a short status message. Leave the tab open — typical decks take seconds, very large ones up to a minute. The file is named after the presentation and appears in your normal downloads folder.