Add a video
Drop in an MP4, MOV, or WebM, including iPhone and Android screen recordings. It stays on your device.
Free toolSpeed Up Video
Speed Up Video
Make any video faster or slower, from 0.25× to 4×, for the whole clip or just one part. Voices keep their natural pitch, and nothing is uploaded.
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How it works
Change a video's speed in three steps
Speed up a slow screen recording or slow down a moment, right in your browser.
Pick a speed
Choose from 0.25× to 4× for the whole video or just one part, and decide how the audio should sound.
Export an MP4
Download a smooth MP4 that plays everywhere, with no watermark and no sign-up.
Speed up a video without the chipmunk voice.
Most quick speed tools raise the pitch along with the speed, so voices sound squeaky. This tool time-stretches the audio instead: people sound like themselves, just faster. If you want the classic sped-up effect, switch to Change pitch.
Faster than the iPhone allows
The iPhone's Photos app can't speed up a normal video, and iMovie stops at 2×. This tool goes up to 4× in one step. For more ways to do it on a phone, see how to speed up a video on iPhone.
Speed up only the slow part
Screen recordings are full of waiting: loading, typing, scrolling. Choose Only part of it, drag the handles over the slow stretch, and leave the important moment at normal speed.
Smooth playback at high speed
When you speed a video up, extra frames are dropped so the export keeps a normal frame rate. That keeps it smooth on phones and social apps instead of stuttering.
Slow motion
Pick 0.25×, 0.5×, or 0.75× to slow a moment down. Slowing a normal video spreads its frames out, so very slow speeds look less fluid than footage shot in Slo-mo.
FAQ
Video speed questions
Is my video uploaded to a server?
No. The video is decoded, re-timed, and encoded by your browser on your own device. It never leaves your device.
How fast can I make a video?
Anywhere from 0.25× (four times slower) to 4× (four times faster), for the whole video or just one part of it.
Will voices sound like chipmunks?
Not with Natural pitch, which is on by default. It changes the speed without changing the pitch. Choose Change pitch if you want the sped-up sound effect.
Does it work on iPhone?
Yes, in Safari on iOS 16.4 or later. On phones the limit is 1 GB per video.
Is there a watermark?
No watermark, no account, and no length limit on the input. Exports can be up to 30 minutes long.
Got the pacing right?
Now make it look like a product video.
MobileStudio turns screen recordings into polished app demos with device frames, smooth zooms, and backgrounds, right on your phone.
Explore MobileStudio →