Speed Up or Slow Down Video Online Free
Free online video speed changer: speed up (2×, 3×, 4×) or slow down (0.25×, 0.5×) any video with pitch-corrected audio. Runs entirely in your browser, no upload.
About Video Speed Changer
Make a video play faster or slower — 0.25× to 4× — while keeping the audio in sync and pitch-corrected. Everything runs locally in your browser, so even large files never leave your device.
How to use Video Speed Changer
- Drop a video file into the upload area.
- Pick a speed (0.25× to 4×).
- Click Process video and download the result as MP4.
Frequently asked questions
Is this video speed changer really free?
Yes — free with no account, no watermark, and no length limit.
Does the audio stay in sync?
Yes. Both the video and audio are retimed together, and the audio pitch is corrected so voices don't turn into chipmunks (or demons) when you change speed.
Which speeds are available?
0.25×, 0.5×, 0.75×, 1.5×, 2×, 3×, and 4×.
Are my files uploaded to a server?
No. All processing happens locally in your browser using WebAssembly. Your files never leave your computer — close the tab and nothing remains.
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