Change Video Speed
Speed up or slow down a video locally in your browser. Choose 0.25× to 4× and export as MP4 or WebM.
Preview
Slow down or speed up a video directly in your browser. No file is uploaded.
No video selected yet.
Speed
How it works
How it works
Step by step
Features
Features
Local with no upload
Video, preview, speed settings and output stay on your device.
0.25× to 4×
Choose presets or a custom factor for the full video.
MP4 or WebM
The worker re-encodes locally and provides the result as a download.
Frequently asked questions
Frequently asked questions
Is my video uploaded?
No. Analysis, preview, processing and download run locally in the browser.
Does slow motion create new intermediate frames?
No. The tool changes the timing of existing frames. It does not create optical-flow or AI interpolation frames.
More tools
More tools
Video Trimmer
Trim the beginning and end of a video directly in your browser. Choose precise or fast trimming, preview and download with no upload.
Split Video
Split a video into multiple files directly in your browser. Add split points or divide by duration or number of parts.
Video to GIF
Convert short video clips into animated GIFs directly in your browser - with size, frame rate, colors and loop.