Change video speed

Często zadawane pytania

Does the sound change pitch?

Yes. The audio is sped up or slowed down together with the picture, like a tape, so its pitch rises or falls. Untick “Keep the sound” for a silent result.

Is there a file size limit?

No fixed limit. The video is read in small slices and the result is streamed to your disk, so even multi-gigabyte files work without filling up memory.

Is my video uploaded to a server?

No. The file is read and written inside your browser tab using WebCodecs — nothing is uploaded, there is no account and no watermark. Once loaded, the page also works offline.