Turn a slow walkthrough into a tight demo, or slow a fast moment down to see it properly. The audio is pitch corrected, so faster does not mean chipmunks.
or click to choose one. MP4, MOV, WebM, MKV. It stays on your device.
The audio is retimed with its pitch preserved, so voices stay natural at any speed.
Your file is being processed on your own device. Keep this tab open.
The panel shows the current length, so you can predict the output: a 4 minute clip at 2x comes out at 2 minutes.
2x is the sweet spot for demos and walkthroughs. Go slower to study fast motion, faster to compress long stretches of waiting.
The result plays right in the page, so you can check the pacing and the audio before saving it.
No. The audio is retimed with pitch correction, the same technique podcast apps use for their speed controls, so a voice at 2x is faster but still sounds like the same person. At 3x, speech stays intelligible but noticeably compressed.
Yes. The video and audio are retimed by exactly the same factor in the same pass, so they cannot drift apart.
No. The video encoder is compiled to WebAssembly and runs inside this browser tab, so your file is read from your disk, processed by your CPU, and saved back to your downloads folder. There is no upload endpoint. You can confirm it by opening your browser devtools network tab, or by disconnecting from the internet once the page has loaded.
Not in one pass: the speed applies to the whole clip. Trim the section out first with the video trimmer, speed it up here, and rejoin the pieces in an editor.
Roughly in proportion to the new length. A video sped up to 2x has half the frames to store, so it comes out near half the size. Slowing down works the other way.
The tool holds your file in browser memory, so it is capped at 600 MB. That covers most screen recordings and phone clips. For anything larger, trim it down first or use a desktop encoder.
Record it right the first time.
Recording Studio records your screen and camera together, composed live, vertical or landscape. Free to start, no account, nothing uploads.
Recording the videos yourself? See how Recording Studio stacks up against Loom and OBS, or why a screen recorder that never uploads matters.