Video Speed Changer

What is Video Speed Changer?

Video Speed Changer adjusts your video playback speed — create slow-motion effects or speed up long recordings. Processing happens entirely using ffmpeg.wasm, keeping your videos private. Ideal for timelapses, tutorials, and dramatic slow-mo shots.

How to use

1. Upload the video you want to adjust the speed of
2. Set the speed multiplier (0.25× for slow motion up to 4× for fast forward)
3. Choose whether to preserve audio pitch, then process and download

Result

You have a 20-minute cooking tutorial and want a 5-minute timelapse version. Upload the video, set speed to 4×, and download the sped-up clip that shows the whole recipe in fast-forward.

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