Video Speed Changer
Slow Motion & Fast Forward
Make video clips slower or faster (0.25x to 4x) with an option to preserve audio pitch or mute sound, and export the result.
Speed Up or Slow Down Any Video Clip
Create smooth 0.25x slow-motion or 4x timelapse videos with optional audio pitch preservation.
What is Video Speed Changer?
Video Speed Changer lets you create smooth slow-motion (0.25x, 0.5x, 0.75x) or fast-forward time-lapse (1.25x, 1.5x, 2x, 3x, 4x) videos in your browser. It includes a toggle to preserve natural audio pitch when speeding up or slowing down, or to mute the audio track completely for silent slow-mo B-roll.
How to Use Video Speed Changer
Upload your video clip
Select an MP4, WebM, or MOV video file, or click Load Sample Video.
Select playback speed
Pick a preset (0.5x Slow-Mo, 1.5x Fast, 2x Double Speed, 4x Time-Lapse) or fine-tune the slider.
Configure audio pitch or mute
Keep Preserve Audio Pitch enabled for natural sound, or check Mute Audio for silent slow-motion.
Preview and export
Watch the speed change live in the video player, then click Export Speed-Adjusted Video.
Key Features
Speed range from 0.25x ultra-slow-motion up to 4.0x hyper-lapse
Option to preserve natural audio pitch or allow classic pitch shift
One-click audio mute for silent slow-motion cinematic clips
Real-time duration calculator showing original vs new video length
100% Client-side video rendering
Tips & Best Practices
- 1
When slowing down sports or action clips to 0.5x, muting the audio or adding background music later often gives a cleaner cinematic feel.
- 2
Speed up long screen-recording tutorials to 1.5x with Preserve Pitch ON to keep viewers engaged without making your voice sound squeaky.
Why Use Our Online Video Speed Changer?
Video Speed Changer helps video creators and YouTubers plan, preview, and optimize their video content right from the browser. No heavy software or sign-up required — get instant, creator-ready results.
Frequently Asked Questions
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