Change Video Speed

Adjust playback speed in a few clicks, whether you want a faster clip or a slow-motion effect for emphasis.

Drop your file here or click to browse

Accepts MP4, MOV, WEBM

Settings

Speed multiplier

Processing runs entirely in your browser. No file is uploaded anywhere.

Show equivalent FFmpeg command

ffmpeg -i input.mp4 -filter_complex [0:v]setpts=0.5000*PTS[v];[0:a]atempo=2[a] -map [v] -map [a] -c:v libx264 -preset fast -c:a aac output.mp4

Frequently asked questions

Will slow motion affect audio?

Yes. The audio pitch and speed are adjusted together with the video. For extreme slow motion, consider muting the video first.

What speeds are supported?

You can choose from 0.25× (very slow) to 4× (very fast). Extreme values may affect audio quality.

Does the output format change?

No, the output is always an MP4 file regardless of the input format.