Choose a speed from 0.25× to 4×. The sound changes speed with it and, if you like, keeps its normal pitch, so a sped-up voice doesn’t turn into a cartoon. The video never leaves your device. It is read and saved by your browser, so there is no upload, no queue and no copy on a server.
Faster playback suits tutorials, cooking clips and long screen recordings. Slower playback makes a jump, a goal or a pour easier to see.
How to change the speed of a video
- Drop your video on the box above.
- Pick a speed. Below 1× is slower, above 1× is faster.
- Leave “Keep the voice pitch natural” on for speech, or turn it off for the classic chipmunk or slow-mo voice.
- Press Change speed and download the new clip.
How smooth is slow motion?
Slowing down shows each recorded frame for longer. A clip filmed at 30 fps and played at 0.5× shows 15 different pictures a second, which looks steppy for fast motion. Footage shot at 60 or 120 fps slows down much more smoothly.
What the pitch option does
Plain speed change works like a record player: faster is higher, slower is deeper. With the option on, the sound is stretched in small overlapping slices so the tempo changes but the pitch stays.
Questions
What is the longest video I can speed up?
Up to 20 minutes of source at a time. Trim longer recordings first.
Can I speed up only part of the video?
Trim that part out first, change its speed, then join the pieces with the merge tool.
Will the length change?
Yes. At 2× a 60 second clip becomes 30 seconds. The tool shows the new length before you start.