change video speed

Create slow-motion effects for your MP4 videos instantly. 100% free and private local processing.

Drag & drop video or Browse Files

change video speed

Speed Factor

Change video playback speed without distorting audio pitch.

1.5x

How to Adjust Video Speed

1

Import Video

Select any MP4, WebM, or MOV file from your device.

2

Set Speed Factor

Use the slider to set a speed between 0.5x (slow motion) and 2.0x (fast forward).

3

Export Video

Click process to apply the changes and download the new video instantly.

Local Processing

Process Videos Anywhere

No internet connection needed after the first load. Change video speeds even while completely offline.

Complete Privacy Protection

Your video content is never uploaded to any remote server. The entire speed adjustment process happens securely within your browser sandbox, keeping your media 100% private.

Lightning Fast

Precision Control Without Distortion

Adjusting video speed usually breaks the audio pitch. We use advanced FFmpeg atempo filters to preserve the natural sound of your audio track even at 2x speeds.

Time Manipulation
Pitch Correction
Fast Export

Frequently Asked Questions

Q: Can I make it 0.5x speed?

A: Yes, you can slow down the video to half speed or even slower.

Q: Will the audio slow down too?

A: Yes, the audio will automatically sync with the new video speed.

Q: Do you keep a copy of my video?

A: Never. The video is processed entirely on your device.