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Speed up or slow down video playback. Create timelapse or slow-motion effects directly in your browser.
Shrink video file sizes by up to 90% with 1-click platform presets and zero quality loss
How to Use
Select or drag files into the upload dropzone to start applying video speed changer.
Customize options, target file parameters, and format preferences for video speed changer.
Save your processed files instantly to your local device with 100% browser-side privacy.
Our engine uses a phase vocoder time-stretch algorithm (`atempo`) that speeds up (up to 4x) or slows down (down to 0.25x) the video without altering audio pitch, preventing the chipmunk or slowed-down demon voice effect.