Happytails.aiFree tools. No account needed.

Change video speed

Speed up or slow down a video and its audio.

No files selected

Accepted files: .mp4,.mov,.mkv,.webm,.avi. Choose one file. Up to 20 MiB in total.

Your result

How to use Change video speed

  1. Choose a file in MP4, MOV, MKV, WEBM or AVI.
  2. Review the settings, then choose Run Change video speed.
  3. Review the result, then use Copy result or a download link when available.

Useful next steps

What to expect

Speed up or slow down a video and its audio. Browser processing keeps files on this device. Choosing Local server sends files to this website’s own processor. Adjusts video timing and audio speed together, preserving audio pitch.