Free Online Video Speed Changer — Slow Motion & Fast Motion (0.25x to 4x)
Free Online Video Speed Changer — Slow Motion & Fast Motion
Speed up or slow down any video from 0.25x to 4x — no watermark, no signup.
How to Change Video Speed Online (3 Steps)
- Upload your MP4, MOV, WebM, or MKV file.
- Choose a preset (0.25x, 0.5x, 2x, 4x) or enter a custom speed.
- Click "Change Speed" and download your new video instantly.
Why Use Our Video Speed Changer?
- ✅ Slow motion — from 0.25x to 0.75x speed
- ✅ Fast motion — from 1.25x to 4x speed
- ✅ Custom speeds — anywhere from 0.1x to 10x
- ✅ No watermark — clean output
- ✅ No signup required — start immediately
- ✅ Free forever — no hidden limits
Frequently Asked Questions
Is this video speed changer free?
Yes — completely free. No signup, no watermark, no file limits imposed by us.
What speeds can I choose?
Presets from 0.25x (very slow) to 4x (very fast), plus a custom speed option between 0.1x and 10x.
Does the audio change too?
No. Audio is muted in the output. Speed-changing audio cleanly requires pitch correction (time-stretching), which is a separate, complex process. For audio, use the original video.
What formats can I speed up or slow down?
MP4, MOV, WebM, MKV, AVI, and most other common video formats.
How does the speed change work?
For faster speeds (e.g., 2x), we drop every other frame and re-time the video. For slower speeds (e.g., 0.5x), we duplicate frames. This is the standard technique used by all video editors.
Does it work on iPhone or Android?
Yes — Safari 16.4+ on iOS and Chrome on Android. For files over 100MB, desktop is recommended.