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Change Video Speed

Make a time-lapse, a slow-motion moment, or speed up a long tutorial. The sound keeps its normal pitch. It runs in your browser with FFmpeg, so your video is never uploaded. Free, no sign-up, no watermark.

Drop a video here or click to choose

MP4, MOV, WebM, MKV · up to 2 GB

Files stay on your device. Nothing is uploaded.

Read the full guide: How to Speed Up or Slow Down a Video (Keep the Pitch)

How to change the speed of a video

Quick answer: To change the speed of a video, add your video, choose the speed, adjust the sound and export.

  1. Add your video. The preview plays at the new speed so you can judge it.
  2. Choose the speed. 2× halves the length; 0.5× doubles it.
  3. Adjust the sound. Turn it up, down or mute it for a silent time-lapse.
  4. Export. MP4 keeps sound; GIF for a silent loop.

Does the voice sound like a chipmunk?

No. The audio is time-stretched, so speech at 1.5× or 2× stays at a natural pitch, like the speed control in podcast apps.

Smooth slow motion

Slowing down repeats frames, so very slow speeds look smoothest on videos filmed at 60 fps or more. Phones' slow-motion modes record at 120–240 fps, which gives the best results.

Frequently asked questions

What speeds can I use?

0.25×, 0.5×, 0.75×, 1.25×, 1.5×, 2×, 3× and 4×.

Can I speed up only part of a video?

Trim the part you want first; the whole exported clip uses one speed.