Does slowing a video down make it look choppy?

Slowing below the source frame rate repeats frames, which can look slightly stuttery. For buttery slow motion, run Crisp's Enhance lane with Smooth motion first — it interpolates extra frames — then slow the clip down.

Can I make a slow-mo video for free without a watermark?

Yes. Crisp's Speed lane is in the free tier and never adds a watermark. Everything runs on your Mac, so nothing is uploaded.

Can Crisp also speed a video up?

Yes — the same Speed lane does 2× (fast) and 4× (timelapse) as well as 0.5× and 0.25× slow motion, with the audio kept in tune.

Guide · How to slow-mo a video on Mac

How to slow down a video on a Mac

Want a dramatic slow-motion clip from footage you already shot? Here's how to slow a video down on a Mac in about a minute — 0.5× or 0.25×, with the audio kept in tune, no watermark, entirely offline.

Updated July 2026 · step-by-step

The short version

Open Crisp → Speed

Grab the free Crisp app for Mac and open it. Click the Speed tab in the task switcher.
Pick a slow-mo speed

0.5× plays at half speed (twice as long); 0.25× is super slow-mo (four times as long). Fast-forward and timelapse (2× / 4×) are right there too.
Drop in your clip

Drag your video onto the window. Crisp retimes it and pitch-corrects the audio, so slowed-down voices don't drop into a deep drone.
Export

Crisp renders the slow-motion clip on your Mac and saves it beside the original — watermark-free.

Want buttery-smooth slow motion?

Slowing a clip below its native frame rate repeats frames, which can look a touch stuttery. For silky slow motion, first run Enhance with Smooth motion on — Crisp interpolates extra frames to a higher frame rate — then switch to Speed and slow it down. Two on-device passes, still offline.

Speeds at a glance

Speed	Effect
0.25×	Super slow-mo · 4× longer
0.5×	Slow motion · 2× longer
2×	Fast · half the length
4×	Timelapse · quarter the length

Why do it on-device?

Private & offline. Your footage never leaves your Mac — no upload, no cloud.
No watermark, no subscription. Free to try; own it once.
Audio stays in tune. Crisp pitch-corrects, so slow-mo speech sounds natural.

Make your first slow-mo clip free

Free to try on your Mac. No watermark, no subscription — nothing leaves your device.

Download Crisp for Mac

Apple Silicon · macOS 12+ · Notarized

FAQ

How do I slow down a video on a Mac?

Open Crisp, choose the Speed lane, pick 0.5× or 0.25×, and drop your clip in. It retimes the video and pitch-corrects the audio on-device.

Is it free and watermark-free?

Yes — the Speed lane is in the free tier and never watermarks your export.

How to slow down a video on a Mac

The short version

Open Crisp → Speed

Pick a slow-mo speed

Drop in your clip

Export