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Video Speed Changer

Speed a video up or slow it down, then export the retimed clip as a WebM file.

Change the playback speed

Video: —
Source length: —
Output length: —
Progress: 0%
Status: Waiting for a video
Retiming happens by re-recording the video in real time, and the export is a WebM file. Keep the tab in the foreground.

How to use the Video Speed Changer

  1. Choose a video file and drag the speed slider.
  2. Tick Keep audio if you want the soundtrack retimed as well.
  3. Click Export and save the WebM file when recording finishes.

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Frequently Asked Questions

Common questions about the free online video speed changer.

Load your video, drag the speed slider to the rate you want and click Export. The retimed clip downloads as a WebM file when it finishes.
No. Browser recording only produces WebM, so an MP4 export needs a native desktop or mobile video tool.
Anything from 0.25x for slow motion up to 4x for a fast version, in steps of a quarter of the original speed.
The browser plays and re-records the video, so a clip sped up to 2x still takes about half of its original length to export.
Yes, when Keep audio is ticked the soundtrack is recorded at the new speed, which also raises or lowers its pitch.
The picture is re-encoded by the browser recorder, so it can look slightly softer than the source file.
No. Everything is processed on your own device, and no part of the video is sent to a server.
Yes on most modern mobile browsers, though recording very long videos may run into memory or battery limits.

Last updated: October 10, 2026