Is the video uploaded when you change the speed?

No. The speed change happens locally in your browser.

Does the pitch change?

It depends on the parameters; see the note about keeping the pitch unchanged.

Speeding up gives a time-lapse feel, but extreme rates can hurt smoothness.

Speed a video up or slow it down — optionally keep the audio in sync with the same pitch, or remove the audio track.

100% browser-based · files never uploaded

Drag the video here, or click to choose

Drag or click to choose a single video · Up to 100.0 MB per file

Playback speed

Adjust the audio too (uncheck to remove the audio track)

🔒 Your files never leave your browser

Is the video uploaded when you change the speed?: No. The speed change happens locally in your browser.
Does the pitch change?: It depends on the parameters; see the note about keeping the pitch unchanged.
Is it good for time-lapse?: Speeding up gives a time-lapse feel, but extreme rates can hurt smoothness.