The Cosmic Cliffs of the Carina Nebula, photographed by the James Webb Space Telescope — Slide one holds while Ken Burns plays. Medium level: zoom from 1.0 to 1.14, pan 0.05 of the edge, seeded per image.

Saturn backlit by the Sun, photographed by the Cassini probe — Crossfade to Saturn: opacity only. Nothing moves.

Storms across Jupiter's southern hemisphere, photographed by the Juno probe — Push to Jupiter: the incoming enters from the trailing edge while the outgoing leaves through the leading edge. Both travel together, like a film strip.

The Pillars of Creation in the Eagle Nebula, photographed by the Hubble Space Telescope — Wipe to the Pillars of Creation: a rectangular mask grows from the trailing edge while the outgoing fades.

Earth, the Blue Marble 2012 composite photograph — Flip to the Blue Marble: two half phases. The outgoing rotates away with ease-in, then the incoming rotates in with ease-out, half a duration later.

This page is a slideshow.

Scroll, and Lumina's own transitions play under your hand: a free, open-source slideshow app for the Mac.

Download Lumina macOS 14 or later · Apple Silicon · MIT

Ken Burns · Medium Zoom to 1.14, pan 0.05 of the edge, over each slide's hold. Seeded per image.

Crossfade Opacity only. Nothing moves. 1.0 s by default.

Push In from the trailing edge, out through the leading edge. Both travel together, like a film strip.

Wipe A rectangular mask grows from the trailing edge. The outgoing fades.

Flip Two half phases: the outgoing turns away with ease-in, the incoming turns in with ease-out, half a duration later.

Four of seven. Hard cut, Slide and Zoom are waiting in the picker at the end.

Three answers to a square photograph.

The slide you just landed on is square. Your display is not. Lumina's scale modes decide what happens at the edges.

The Blue Marble letterboxed inside a widescreen frame, with empty bars left and right — **Fit**The whole image. Empty bars.

The Blue Marble filling a widescreen frame completely, cropped top and bottom — **Fill**Fills the frame. Crops.

**Fit Blurred**The whole image. The bars are the image itself, blurred.

The Blue Marble shown whole, the side bars filled with a blurred copy of the same image — **Fit Blurred**The whole image. The bars are the image itself, blurred.

Deliberately small.

No library, no import, no database, no telemetry, no accounts. You point Lumina at folders, it plays them, it forgets them again.

The Lumina window on macOS, with folders queued for playback — The whole app is this window: pick folders, press play.

Animated formats actually play: Animated WebP, GIF and APNG run frame for frame, decoded through libwebp: roughly 186x faster than the system decoder on long animations.
Six languages: English, German, French, Italian, Spanish and Japanese, following the system language.
Updates handle themselves: New versions install on their own, verified against a public key built into the app.

Point it at a folder tonight.

Version 1.5.0. macOS 14 or later, Apple Silicon. Free and open source, MIT licence.

Download Lumina

First launch

Lumina is signed but not notarized, so macOS blocks the first launch once. Open System Settings, Privacy and Security, scroll to Security, choose Open Anyway. Once only: after that, updates install themselves.

The picker, live

Jupiter's southern hemisphere, current slide of the demo player

Saturn backlit by the Sun, next slide of the demo player

All eight entries of the app's picker. Each runs at the default 1.0 s, clamped in the app to 80 percent of the slide duration.