Video Speed Changer
Speeding up a how-to video makes it watchable; slowing one down shows what actually happened. We adjust the audio tempo separately from the pitch, so a 2× lecture sounds quick rather than like a chipmunk.
🔒 Uploaded for processing only — deleted automatically within 1 hour
Choose a file
Up to 500 MB · MP4, MOV, M4V, WEBM · we start right away
Choose fileChoose a file — the result appears right here. Nothing else to press.
How it works
- Choose your video.
- Pick a speed — 2× for a timelapse feel, 0.5× for slow motion.
- Download the adjusted clip.
Good to know
FormatsMP4, MOV, M4V, WEBM in — MP4 out
- Turning a long how-to into a quick timelapse
- Slowing down a golf swing or a dance move to study it
- Trimming watch time off a screen recording
Questions
Do voices sound squeaky when sped up?
No. The tempo is changed without shifting the pitch, so speech stays natural up to about 3×.
Does slow motion look smooth?
It replays the existing frames more slowly. Footage shot at a high frame rate looks smoothest; standard 30 fps video will look slightly steppy at 0.25×.
Is the audio kept?
Yes, sped up or slowed to match. Videos with no sound simply come back silent.
🔒 Uploaded for processing only. Your file and the result are deleted automatically within an hour — sooner once you've downloaded it.