Change Video Speed
Speed up or slow down a video while keeping audio synced.
About Change Video Speed
Change Video Speed speeds up or slows down a clip while keeping the audio synced to the new pace, exporting an MP4. Use it to make a timelapse, create a slow-motion moment, or tighten a draggy recording. Everything runs in your browser, so your footage is processed on your device and never uploaded.
- Category
- media
- Input
- Accepts: video/*.
- Output
- Outputs: video/mp4.
- Cost
- Free, runs in your browser
- Memory
- high
- Install group
- ffmpeg
Common uses
- Turn a long screen recording into a brisk timelapse to fit a short slot
- Slow a fast hand-motion or sports clip into smooth slow-motion for emphasis
- Speed up a tutorial's quiet setup steps so viewers reach the payoff faster
- Slow down a clip slightly to make on-screen text easier to read
- Compress a multi-minute build process into a few seconds of timelapse
- Nudge a clip's pacing so it lines up with a fixed-length music bed
Frequently asked questions
Does the audio stay in sync when I change speed?
Yes. The tool keeps audio synced to the adjusted video, so dialogue and sound follow the new pace rather than drifting.
How fast or slow can I go?
You choose the speed factor to speed up or slow down. Extreme factors naturally produce choppier slow-motion (fewer source frames per output frame) or very brief timelapses.
What formats does it accept and output?
It accepts common video files (any video/* type) and always exports an MP4.
Is my video sent to a server?
No. Speed changes are computed in-browser on your own device, so the footage stays private.
Will the audio sound higher or lower pitched?
The tool keeps audio aligned with the video timeline; the focus is staying in sync as the clip's duration changes with the chosen speed.
Keywords
- video
- speed
- slow
- fast
- timelapse
- slowmo
- playback
- tempo