Video Speed Changer
Make a video faster or slower. The sound is adjusted too, without the chipmunk effect.
- 100% in your browser
- No upload
- No sign-up needed
- No watermark
How to change video speed
- Add your video
Drop a video (or an audio file) on the box above. It stays on your device. - Pick a speed
Slow it down to 0.25× or speed it up to 4×. Voices keep their natural pitch unless you turn that off. - Save and download
Download the new MP4 when it is ready.
Features
- No uploadProcessing happens on your device with WebCodecs, so even large files stay private.
- No sign-up needed, no watermarkUse every tool as often as you like. Your output is clean.
- Hardware acceleratedUses your device’s video encoder when available, so most jobs finish in seconds.
- Works on phone and desktopRuns in Chrome, Edge, Safari and Firefox on iPhone, Android, Windows and Mac.
Frequently asked questions
Are my files uploaded?
No. The file is read and processed by your browser. It never leaves your device.
Is it free?
Yes. There is no file limit and no watermark, and you don’t need an account.