QRix
0.25×–4×: turn recordings into timelapses or buttery slow-mo.
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Yes — completely free, no watermark, no signup, no file limits beyond your device's memory.
No — everything runs on your device in the browser. Your videos never leave your computer.
Real MP4 (H.264) where your browser can encode it — Chrome, Edge and Safari — with WebM (VP9) as an automatic fallback elsewhere. Everything is transcoded on your device; nothing is uploaded.
Audio follows the new speed. For silent output, combine with the Mute option.
The Speed Controller re-times your video from quarter-speed slow motion to 4× timelapse, audio included. The preview plays at the selected rate so you hear and see the result before exporting.
It's free, private and works right in your browser — no signup, no watermark.