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VideoDownloader
Runs entirely in your browser

Video Speed Controller

Slow a video down or speed it up — no upload, no account.

Drop a video here, or browse

MP4, MOV, WebM, MKV, AVI — up to 1 GB

Processed entirely in your browser — the video file is never uploaded anywhere. Audio pitch stays natural at every speed; large files take longer and use more memory.

How it works

  1. Step 1

    Upload a video

    Drag a video file in, or browse for one on your device.

  2. Step 2

    Pick a speed

    0.5x for slow motion, 2x to speed things up, or anything in between.

  3. Step 3

    Download the result

    Processing runs in your browser, then the file saves to your device.

Why audio doesn't sound like a chipmunk

Speeding up or slowing down audio the naive way changes its pitch along with its speed. This uses a time-stretching technique instead, so voices and music stay at their natural pitch no matter which speed you pick.