# Video Upscaler

> A video upscaler raises a clip's resolution, for example from 720p (1280 × 720) to 4K (3840 × 2160), which is nine times the pixels. An AI upscaler rebuilds detail instead of stretching it. Kenerate's AI Video Upscaler offers 720p, 1080p, 2K and 4K for clips up to 5 minutes and about 100 MB, keeping length and frame rate.

URL: https://kenerateai.com/video-upscaler
Publisher: Kenerate AI (https://kenerateai.com)
Last updated: 6 October 2026

## Key facts
- Output sizes: 720p · 1080p · 2K · 4K
- Default: 1080p
- Clip limit: 5 min · about 100 MB
- Kept: Length, frame rate, aspect ratio
- Engine: LTX-2 video upscaler
- 3 s clip at 1080p: About 80 s in our test
- 480p → 1080p (About 5× the pixels): 854 × 480 (SD) → ≈ 1920 × 1080. Old phone, webcam or DVD footage going to social media.
- 720p → 1080p (2.25× the pixels): 1280 × 720 (HD) → ≈ 1920 × 1080. AI-generated clips and older HD video for web and phones.
- 1080p → 2K (About 1.8× the pixels): 1920 × 1080 (Full HD) → ≈ 2560 × 1440. QHD monitors and a sharper master without 4K file sizes.
- 1080p → 4K (4× the pixels): 1920 × 1080 (Full HD) → ≈ 3840 × 2160. 4K TVs, 4K uploads and mixing with 4K camera footage.
- 720p → 4K (9× the pixels): 1280 × 720 (HD) → ≈ 3840 × 2160. Big screens when 720p is all you have; compare it with 2K.

## Steps
1. Open the AI Video Upscaler — It runs in the browser; sign in with a verified email first.
2. Add your clip — Upload a video up to 5 minutes and about 100 MB, or pick one from your History or Library.
3. Choose the output size — 720p, 1080p (the default), 2K or 4K. The panel shows the size your clip will come out at.
4. Start and wait — A 3-second clip took about 50 seconds at 720p and about 80 seconds at 1080p in our tests; 4K takes much longer.
5. Compare and download — Check the before/after viewer, then download the MP4 or send it straight to Add subtitles.

## In depth

### 720p, 1080p, 2K and 4K in pixels
The number is the frame's height in lines. 720p is 1280 × 720, 1080p (Full HD) is 1920 × 1080, and consumer 4K (UHD) is 3840 × 2160 [1]. "2K" is used loosely: cinema 2K is 2048 × 1080, while most monitors sold as 2K or QHD are 2560 × 1440. Kenerate's 2K setting targets the 2560 × 1440 pixel count.

### When upscaling helps
In each case the AI has real detail to work from and a clear reason to add pixels.
- The video will play on a bigger screen than it was made for.
- It has to sit next to higher-resolution footage in one edit.
- It is an AI-generated clip that came out at 720p.
- It shows compression blocks or banding from repeated uploads.
- It is an old clip you can't film again.

### When it doesn't
Upscaling sharpens what is there. It can't refocus a shot that was out of focus, remove heavy motion blur, steady a shaky camera or add frames. If the video will only be watched on a phone at the size it already has, an upscale mostly makes the file bigger.

### Why AI upscaling looks different from a resize
A resize fills new pixels with averages of their neighbours, so edges get bigger and softer. Video super-resolution uses several neighbouring frames to rebuild plausible detail, which keeps edges crisp and avoids flicker between frames [2].

References:
[1] Display resolution — Wikipedia: https://en.wikipedia.org/wiki/Display_resolution
[2] Video super-resolution — Wikipedia: https://en.wikipedia.org/wiki/Video_super-resolution

## FAQ
Q: How do I upscale a video?
A: Upload the clip to an AI video upscaler, choose the output size and download the result. On Kenerate, open the AI Video Upscaler, add a video of up to 5 minutes and about 100 MB, pick 720p, 1080p, 2K or 4K and start. You can compare the before and after in the viewer before you download the MP4.

Q: Does upscaling a video actually improve quality?
A: It depends on the method. A plain resize in an editor adds pixels by averaging the old ones, so the picture is bigger but no sharper. An AI upscaler predicts detail and removes compression blocks while it enlarges, which is why the result looks like a higher resolution. It cannot recover detail the camera never recorded.

Q: What resolution should I upscale to?
A: Match the screen the video will play on. 1080p suits phones, social media and most websites. 2K suits QHD monitors. 4K suits 4K TVs and projects that mix with 4K camera footage. Going higher than the screen only makes the file bigger and the upscale slower.

Q: Is there a free video upscaler?
A: Some open-source tools run free on your own computer if it has a capable graphics card. Kenerate's upscaler runs in the browser on credits, with no subscription required and no watermark on the result. New accounts get starter credits, so you can test it on your own clip before paying.

Q: How long does video upscaling take?
A: It grows with the clip length and the output size. In our tests, a 3-second clip took about 50 seconds at 720p, about 80 seconds at 1080p and close to 5 minutes for a 4-second clip at 4K. Longer clips take proportionally longer, so trim the video to the section you need.

Q: Will upscaling change the frame rate or length?
A: No. Kenerate's upscaler works on the frames you upload and keeps their number, so the length and frame rate stay the same. To make motion smoother with more frames per second you need frame interpolation, which is a different process from upscaling.

Q: Can I upscale a vertical video?
A: Yes. The output sizes are a pixel count rather than a fixed frame, so a 9:16 phone clip keeps its shape. At 1080p it comes out at about 1080 × 1920, and at 4K at about 2160 × 3840, with no black bars and no cropping.

## Related pages
- AI video upscaler: https://kenerateai.com/ai-video-upscaler
- Upscale video to 4K: https://kenerateai.com/upscale-video-to-4k
- HD video converter: https://kenerateai.com/convert-video-to-hd
- AI video enhancer: https://kenerateai.com/ai-video-enhancer
- Topaz Video AI alternative: https://kenerateai.com/topaz-video-ai-alternative

## Sources
- Kenerate AI Video Upscaler (tool): https://kenerateai.com/app/tool/video-upscale
- Display resolution — Wikipedia: https://en.wikipedia.org/wiki/Display_resolution
- Video super-resolution — Wikipedia: https://en.wikipedia.org/wiki/Video_super-resolution
- Topaz Labs (Topaz Video AI), checked 6 October 2026: https://www.topazlabs.com/
- Video2X on GitHub, checked 6 October 2026: https://github.com/k4yt3x/video2x