Video Speed Changer
Change video speed online — slow motion or fast-forward any video in your browser. Output is WebM, free, no upload. — free, fast and private.
How to use Video Speed Changer
- Choose a video file.
- Pick the new speed — below 1× for slow motion, above 1× to speed up.
- Click Change Speed and wait while the video plays through at the new speed.
- Download your speed-changed video.
Honest limit: Output is WebM (VP8/VP9) — browsers cannot encode MP4/H.264. The video is re-recorded in real time at the new speed, so a 2× speed-up of a 60-second video takes about 30 seconds. Audio pitch follows the speed change.
Frequently Asked Questions
Is the video speed changer free?
Yes, it is 100% free with no sign-up. Your video never leaves your browser.
What format is the output?
WebM. Browsers can only record WebM — they cannot encode MP4/H.264. WebM plays in Chrome, Edge, Firefox and most players.
Does the audio change too?
Yes. Audio plays at the same speed, so it sounds slower (lower pitch) or faster, just like a real speed change.
Why does it take a while?
The video is re-recorded while it plays at the new speed. A 2× video finishes in about half its length; a 0.5× video takes about twice its length.