Native macOS · Local-only
Just want to speed up the slow parts? You don’t need iMovie for that.
iMovie is a capable editor — which is exactly the problem when all you want is to fast-forward the boring stretches of a long recording. Speedup does that one job and nothing else.
Same result. A lot less editing.
In iMovie you’d import the clip into a project, split it at the start and end of every slow stretch, set a speed on each piece, and watch the audio for surprises — then export. Speedup skips the project: drag across a stretch on the timeline, pick a speed, and the muting and re-timing happen for you. It opens your file directly and leaves the original untouched.
Three steps. One file. Five minutes.
- 01
Open your recording
Drop the file straight in — no project, no import step.
- 02
Mark the slow parts and pick a speed
Drag across each one and choose 2×, 4×, 8×, or 16×. Sped-up sections are muted automatically.
- 03
Export one .mp4
Trim the ends, press Export, and get a single full-resolution .mp4 — ready to post.
A few common questions
Is Speedup a replacement for iMovie?
Only for one job — speeding up parts of a recording. It has no titles, transitions, or multi-track editing; if you need those, keep iMovie. If you just need variable speed, Speedup is faster.
Will it edit my original file?
No. It saves a new .mp4 next to your recording and never changes the original.
What does it cost?
Your first export is free. After that, a one-time $29 unlocks unlimited exports — no subscription, no account.
What can I open?
Any screen recording — .mp4, .mov, or .m4v.
Which Macs does it run on?
Any Mac on macOS 15 (Sequoia) or later, Apple Silicon or Intel.