Change Video Speed
Speed up or slow down a video. Adjust playback speed from 0.25x to 4x with synchronized audio.
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Max 4096.0 MB per file · drop multiple for batch
100% private — files never leave your device
·Free — no sign up, no watermark
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How to Use Change Video Speed
- Upload a video file — MP4, MKV, MOV, and other formats are supported
- Set the speed multiplier: values above 1 speed up (2x = double speed), values below 1 slow down (0.5x = half speed)
- Click Process — both video and audio are adjusted to the new speed
- Choose your output format and download the speed-adjusted video
Features
- Speed up from 1.25x to 4x or slow down to 0.25x
- Output as MP4, MKV, MOV, or WebM
- Audio pitch is adjusted to match the new speed
- 100% private — files never leave your browser
Frequently Asked Questions
- What happens to the audio when I change video speed?
- The audio pitch shifts to match the new speed. At 2x speed the audio plays faster and higher-pitched. At 0.5x it plays slower and lower-pitched, just like real slow motion.
- What speed values can I use?
- Any value from 0.25x (quarter speed) to 4x (quadruple speed) in 0.25 increments. Popular choices: 0.5x for slow motion, 1.5x for slightly faster, 2x for timelapse-style speedups.
- Can I create a timelapse from a long video?
- Yes, use 4x speed to compress a long clip into a quarter of its original length. For extreme timelapse effects, run the tool multiple times — 4x twice gives 16x overall.