Native macOS · Local-only
Speed up the parts that drag — leave the rest at full speed.
A blanket “2× the whole video” makes your good moments fly by and your audio unlistenable. Speedup lets you mark each slow stretch on the timeline and speed up only that — the rest plays normally, audio intact.
One speed for the whole clip is the wrong tool.
Speed the entire video up and the moments that matter vanish; leave it alone and nobody watches to the end. What long recordings actually need is different speeds in different places — fast through the dead air, normal through the payoff.
Three steps. One file. Five minutes.
- 01
Open your recording
Drop in a .mov, .mp4, or .m4v. It plays right away — no import, no project file.
- 02
Mark the slow stretches and pick a speed
Drag across each part that drags and give it 2×, 4×, 8×, or 16×. Add as many as you want; sped-up sections are muted so the audio never goes chipmunk.
- 03
Export one .mp4
Trim the ends, press Export, and get a single full-resolution .mp4 — ready to post anywhere.
Made for long recordings of every kind.
The same idea — speed up the slow stretches, keep the good parts at full speed — fits any long process you record. A few of them:
- Coding videosFast-forward the dead air in a long AI coding session.
- Drawing videosTurn an hours-long drawing session into a watchable speed-paint.
- Music production videosMake a cook-up from a long beat-making session.
- Design process videosTurn a long Figma session into a build-along.
- Makeup videosSpeed up the blending; keep the reveal at full speed.
- An iMovie alternativeJust the speed-up job — without the full editor.
A few common questions
Can I set different speeds on different parts?
Yes — that's the core idea. Each segment you mark gets its own speed (2×–16×); unmarked parts stay at full speed.
What happens to the audio in sped-up parts?
It's muted, so your normal-speed narration carries the video — no chipmunk effect.
Can I speed up the whole video if I want?
Yes — just mark one segment across the whole timeline. But the point of Speedup is that you usually don't want to.
What can I open?
Any screen recording — .mp4, .mov, or .m4v.
Do my recordings stay private?
Completely. Nothing is uploaded; your recordings never leave your Mac.