Video Speed

Speed up or slow down a video — 0.25x to 4x

Free Video Speed Changer — Speed Up or Slow Down Videos

ezyimg's Video Speed Changer lets you speed up or slow down any video from 0.1x to 4x. Use presets (0.25x, 0.5x, 2x, 4x) or set a custom speed. Audio is pitch-corrected automatically so it sounds natural at any speed — all processing runs in your browser.

How to Use

  1. 1

    Upload your video

    Drop an MP4, MOV, WebM, or other video file into the upload area.

  2. 2

    Choose a speed preset or custom value

    Click a preset (0.25x for slow motion, 2x for double speed) or drag the slider for a custom speed.

  3. 3

    Mute audio (optional)

    Check 'Mute audio' if you want silent output, especially useful for extreme speeds where audio pitch correction may sound unnatural.

  4. 4

    Apply speed change

    Click Apply. Both video and audio are adjusted to the new speed. Processing runs in your browser.

  5. 5

    Download the video

    Compare before/after file sizes and download the speed-adjusted MP4.

Tips & Best Practices

  • →0.5x is great for showing details in fast-action footage like sports or cooking.
  • →2x–4x is perfect for time-lapse style videos or skipping through long recordings.
  • →Audio is pitch-corrected at speeds between 0.5x and 2x — outside this range, muting is recommended.
  • →Speed-changed videos are shorter (faster) or longer (slower) than the original.

Frequently Asked Questions

How do I speed up a video online for free?

Upload your video to ezyimg's Video Speed Changer, select a speed above 1x (e.g. 2x), and click Apply. The video plays at double speed and is re-encoded to the new timing.

How do I create a slow motion video online?

Set the speed to 0.25x or 0.5x. The video will play at quarter or half speed, stretching each second of original footage into 4 or 2 seconds of slow-motion output.

Does the audio change when I change video speed?

Yes. ezyimg uses the atempo filter to adjust audio pitch and speed together, so the audio sounds natural (not chipmunk-pitched or bass-heavy) at most speeds.

Can I make a video 4x faster?

Yes. Select the 4x preset or set the slider to 4. The output video will be 4 times shorter than the original and play at 4x speed.

Does changing speed affect video quality?

The video is re-encoded at the new speed, which introduces some compression. ezyimg uses H.264 at a good quality level to minimize visible quality loss.