Speed up or slow down video and audio online
Speed up or slow down video and audio online for free, right in your browser. No uploads and no sign-up — your files never leave your device.
Drop files here or choose them
You can also paste files with Ctrl+V
Files never leave your device
Speed up a long video or lecture, or slow down a moment to see it better: from 0.25× to 4× for MP4, MOV, WebM and audio files. The voice keeps its pitch — no chipmunk effect. All in your browser; nothing is uploaded.
How it works
- Choose a video or audio file or drag it onto the page.
- Pick the speed: below 1× slows it down, above 1× speeds it up. For a video you can also remove the audio.
- Click Change speed and download the file in the same format (MOV is saved as MP4).
Frequently asked questions
Does the voice sound higher when sped up?
No. The tempo changes without changing the pitch, so speech stays natural at 1.5× or 2×.
How long will the result be?
The length is divided by the speed: a 10-minute video at 2× lasts 5 minutes, and at 0.5× it lasts 20.
Is it free?
Yes. All tools are free, with no sign-up and no watermarks.
Are my files uploaded to a server?
No. Everything runs in your browser, so your files never leave your device.