Free digital signage for Windows and Mac.

1. Your computer’s photo slideshow

Windows Photos and macOS Photos can both play a folder of pictures as a slideshow. It’s fine for a handful of photos at home, but it isn’t built for signs: no PDFs, limited control over timing, and it doesn’t keep a second screen separate from your controls.

2. PowerPoint or Keynote on repeat

Both can loop a presentation by itself. In PowerPoint, set slide timings, then Slide Show › Set Up Slide Show › Loop continuously until Esc. In Keynote, set the presentation to Self-Playing and turn on Loop slideshow. Good when the content already lives in one deck; harder when you want to mix in videos or swap content during the day. Step-by-step guide.

3. Cloud signage services

Hosted signage platforms manage many screens from a web dashboard, usually with a media player at each TV. They suit chains and campuses with dozens of screens; most charge per screen and need reliable internet.

4. A dedicated looping player: LoopCast

LoopCast is free and made for one or a few screens run from a computer:

• Plays pictures, videos and PDFs from a folder, on repeat, full screen on the TV.
• Works offline. Nothing is uploaded.
• Each folder is a playlist; switch between them with a click.
• Drop in new files and they join the loop without stopping it.
• Logo and black screens on one key.

Which should you use?

• A few photos at home: your computer’s photo slideshow.
• Everything is already in one deck: PowerPoint or Keynote on repeat.
• Dozens of screens across sites: a cloud signage service.
• One or a few screens, mixed media, no internet needed: LoopCast.