Change video speed
Timelapse a screen recording or slow a tutorial, voices stay natural.
Drop videos here or click to browse
The converter downloads once (about 32 MB), then works offline. Your videos stay on your device.
Speed is an editing decision, not a player setting
Player speed controls disappear the moment you share the file. Baking the speed in makes a 10-minute screen recording a 5-minute tutorial, or a fast process readable at half speed. The audio is tempo-matched with pitch preserved, so narration stays human at every speed.
Frequently asked questions
Does the voice turn into a chipmunk at 2x?
No. The audio tempo is changed with pitch preservation, the same technique podcast apps use.
What about videos with no sound?
They work too; the tool detects the missing audio track and retimes the video alone.
Is my video uploaded?
No. The re-timing runs in your browser via WebAssembly FFmpeg.
Is there a limit on files or length?
No. Your own device does the work, so there are no queues, caps or accounts.