Change Video Speed
Speed a video up or slow it down from 0.5× to 3×. The audio is retimed to match, and silent videos work too.
- Runs entirely in your browser
- No sign-up, no watermark
- Free and unlimited
🔒 Your file stays on your device
Need to scan documents from your phone?
VideoKit
Compress • Trim • Convert • GIF
How to use Change Video Speed
- 1
Drop a file onto Change Video Speed, or click to choose from your device.
- 2
Set any options for how the file should be processed.
- 3
Press the action button — everything runs in your browser.
- 4
Download the result. Nothing is uploaded or stored.
What you get
- 0.5× to 3×
- Audio retimed to match
- Works on videos with no audio
- Runs on your device
What happens to your files
This tool runs entirely in your browser. The file you choose is read into memory, processed on your device, and offered back as a download. Nothing is uploaded and nothing is kept once you leave the page.
There is no account, no email, no watermark and no daily limit. Come back whenever you need it.
Frequently asked questions
- Does it keep the pitch of the audio?
- Yes. The audio is time-stretched rather than just resampled, so voices don't turn into chipmunks at higher speeds.
- How large a video can I use?
- Up to 300 MB. The video is processed in your browser's memory, so very long or very large files can run out of it. For those, the free VideoKit mobile app processes videos natively on your phone.
- Is my video uploaded anywhere?
- No. FFmpeg runs inside your browser tab as WebAssembly, so the video never leaves your device. The first run downloads the video engine (about 30 MB) from this site once and reuses it afterwards.