Change Video Speed

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Speed up or slow down a video — from 0.25× slow motion to 4× fast forward — keeping the audio in sync.

Drag & drop your video here, or click to browse

Accepted: MP4, MOV, WEBM, MKV, AVI, M4V. Up to 20 MB.

Pick a speed — the preview instantly plays at that speed.

The audio stays in sync and keeps its natural pitch.
Preview & result
— Original
2×
— New duration
Live preview
Pick a video and a speed — it plays here at the new speed before you apply it.
Changing the speed… long videos can take a while.
Your video is ready

The download started automatically. Need it again?

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How it works
1
Upload a video — MP4, MOV, WebM, MKV, AVI or M4V.
2
Choose a speed and watch the live preview — audio keeps its natural pitch.
3
Apply it, preview the result and download your new MP4.
Popular conversions
Slow motion video Speed up video Fast forward video Slow down video Make a timelapse
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About Change Video Speed

Change Video Speed speeds up or slows down a clip anywhere from 0.25× slow motion to 4× fast forward. Because the preview plays instantly at whatever speed you pick, you can compare half speed, double speed or a 4× timelapse before processing anything.

The audio is handled properly: it stays in sync with the picture and keeps its natural pitch, so voices do not turn into chipmunks at 2× or slur at half speed. The page also shows the new duration next to the original so you know exactly what you will get.

Processing runs on the server and produces an MP4. It is a free tool — handy for turning long screen recordings into brisk walkthroughs or stretching an action moment into slow motion.

How to use Change Video Speed

  1. Upload a video — MP4, MOV, WebM, MKV, AVI or M4V.
  2. Pick a speed from 0.25× to 4×; the live preview plays at that speed immediately.
  3. Check the new duration shown next to the original.
  4. Click Change speed and wait for processing.
  5. Preview the result and download your new MP4.

Frequently asked questions

No. The soundtrack is time-stretched so it keeps its natural pitch — a 2× video sounds faster but voices stay at their normal tone, and slow motion does not drop into a low growl.

Yes. Pick 3× or 4× to condense long footage into a timelapse-style clip. For extreme compression you can run the result through the tool again.

Down to 0.25×, which stretches the clip to four times its length. Note that the tool slows existing frames rather than inventing new ones, so very fast motion may look slightly steppy at the lowest speed.

Yes, it is free. Upload the clip, choose a speed, apply it and download the MP4 — no credits and no watermark.

The clip is uploaded, re-timed on the server and offered back as a download. Uploads and results are cleaned up automatically on a schedule, so they do not sit on the server long-term.
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