Playback speed

Change video speed without uploading it.

Speed up or slow down a video locally in your browser and download a new MP4. Good for demos, quick previews, and slow-motion review.

0.5x to 2xSimple speed presets.
Audio includedAudio speed changes with video.
No uploadSource video stays local.

Change video speed

Choose a playback speed, then process locally.

Local
Choose a video fileDrop a file here or click to browse.

Your selected video is processed in this browser tab. It is not uploaded to a conversion server.

Download MP4

Ready.

Speed changes the timeline

Changing speed is different from trimming or compressing. The whole video plays faster or slower, and the audio timing is adjusted with it.

This version uses reliable speed presets from 0.5x to 2x. More extreme speeds can break audio quality and are intentionally not included yet.

Before you start

What happens to your file?

The selected video is processed in this browser tab. It is not uploaded to a conversion server.

Best first try

Use 1.5x for demos and 0.5x for slow-motion review. Use 2x when you need a quick preview.

When this may fail

Very large files can hit browser memory limits. Videos without normal audio tracks may need a fallback export.

Frequently asked questions

Can I speed up video without uploading it?

Yes. The selected video is processed locally in the browser tab.

Does audio change speed too?

Yes. The tool adjusts audio timing to match the new video speed.

Can I choose any speed?

The version uses safe presets from 0.5x to 2x to keep browser processing reliable.