Speed Up Video Online
Make a video play faster or slower — 2× for a quick timelapse feel or 0.5× for slow motion — with the audio kept in sync. No watermark, no sign up.
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Why Change Speed?
Changing playback speed turns a long clip into a snappy fast-forward, creates a slow-motion effect, or fits a video into a time limit. This tool adjusts both the video and its audio together so they stay perfectly in sync.
Pick a multiplier from 0.25× (much slower) to 4× (much faster). The output keeps the original format with no watermark.
How to Change Speed
- 1
Upload your video (MP4, MOV, MKV, AVI, WebM, and more).
- 2
Choose a speed multiplier (e.g. 2 for twice as fast, 0.5 for half speed).
- 3
MiConvert re-times the video and audio on the server.
- 4
Download the sped-up (or slowed-down) video.
Key Features
- Speed up or slow down from 0.25× to 4×
- Audio re-timed in sync, pitch preserved
- No watermark on the output
- Works with MP4, MOV, MKV, AVI, WebM, and more
- Free, no installation, no sign up
Frequently Asked Questions
How do I speed up a video online? ▼
Upload your video, choose a speed like 2× (twice as fast) or 0.5× (half speed), and download the result — free, no sign up.
Does the audio stay in sync when I change the speed? ▼
Yes — the audio is re-timed by the same factor as the video, so they stay in sync. At higher speeds the pitch is preserved rather than turning into a chipmunk effect.
Can I slow a video down for slow motion? ▼
Yes — choose a multiplier below 1, such as 0.5 for half speed. (True slow motion is smoothest when the source was filmed at a high frame rate.)
Is there a watermark? ▼
No — MiConvert does not add a watermark.
What speed range is supported? ▼
From 0.25× (four times slower) up to 4× (four times faster).