QRix
Exact width×height or one-tap social presets — 9:16, 1:1, 16:9.
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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.
Processing is in-memory, so a few hundred MB works comfortably on most devices; very long 4K files depend on your RAM.
Resize Video scales and letterboxes/crops your footage to exact pixel dimensions or platform presets: Instagram Story 1080×1920, Square 1080×1080, YouTube 1920×1080. The preview shows precisely what will render, then the on-device pipeline exports it.
It's free, private and works right in your browser — no signup, no watermark.