Change Video Speed
Speed up or slow down a video or audio file from 0.25x to 4x.
Private by design: your files are processed inside your browser and are never uploaded to our server.
About Change Video Speed
Speed up long lectures and tutorials or create slow motion from 0.25× to 4×, with the audio pitch kept natural.
How to use Change Video Speed
- Step 1Select your file(s) or drag and drop them into the box.
- Step 2Choose the Change Video Speed settings you want.
- Step 3Click the button and download your result.
Questions & answers
Does the voice sound like a cartoon when sped up?
No. The audio is time-stretched so the pitch stays natural.
Is Change Video Speed free?
Yes. Every tool on this site is free to use, with no signup, no watermark and no daily limit.
Are my files uploaded to a server?
No. Your files are processed inside your own browser on your device. They are never uploaded, so nobody else can see them.
Is there a file size limit?
There is no fixed limit. Because processing happens on your device, very large files depend on your phone or computer memory. Most files up to a few hundred MB work fine.
Why does it take a moment the first time?
The video engine (about 30 MB) downloads once the first time you use a video or audio tool. After that your browser keeps it, so next time it starts quickly.
Does it work on mobile?
Yes. It works in Chrome, Safari, Edge and Firefox on Android, iPhone, Windows and Mac.