Upscale Video to 4K

Beta

From HD to 4K — the detail drawn anew, not stretched.

Free · No upload · No sign-up · No watermark

How to upscale a video to 4K

01
Open your video
1080p, 720p or smaller, in almost any format. It stays on your device.
02
Check it at 4K
4K is chosen already: compare a frame before and after, at actual pixels, and see how long it will take.
03
Upscale and download
Download the 4K MP4 — 3840 × 2160 for a widescreen video, in its own shape for others.

Why use Cutlia for this

Real 4K detail

The AI redraws edges and textures at four times the size, so a 4K screen shows detail rather than blur.

Any shape

Widescreen becomes 3840 × 2160; vertical phone videos become 2160 × 3840 — nothing cropped.

On your device

No upload of big files, no queue, no watermark: your graphics chip does the work.

Frequently asked questions

Can I upscale 1080p to 4K?

Yes — and 720p, 480p or smaller too, up to six times the original's size. The bigger the original, the longer each frame takes: 1080p takes about five times as long as 480p.

How big is the 4K file?

Bigger than the original: 4K holds four times the pixels of 1080p. If you need a smaller file afterwards, Compress Video makes it smaller.

Is it really free?

Yes. Cutlia is free to use with no account, no trial and no watermark on your export. The site is paid for by the ads on it, and your files never leave your device.

Made for

Each one is this upscaler, set up for the job — and it still offers every size.

Everything in the Video Upscaler

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