Upscale a video to twice its resolution with AI, right in your browser. 720p becomes 1440p, 1080p becomes 4K. No signup, no watermark, and your video is never uploaded.
Processing happens on your device's GPU. Keep this tab open until the download appears.
The AI model doubles both width and height. Common results:
| Your video | After upscaling |
|---|---|
| 480p (854×480) | 960p (1708×960) |
| 540p (960×540) | 1080p Full HD (1920×1080) |
| 720p (1280×720) | 1440p QHD (2560×1440) |
| 1080p (1920×1080) | 4K UHD (3840×2160) |
Most online video upscalers send your file to a cloud GPU, which costs them money for every second of video. That is why they add watermarks, cap the length or ask for a subscription.
This tool works differently. The neural network runs on your own graphics card through WebGPU, a browser feature for fast GPU computing. Decoding and encoding use the browser's built-in WebCodecs. There is no server doing the work, so there is nothing to charge for, and your video stays private.
Plain resizing stretches pixels and leaves the picture soft. An AI upscaler uses a convolutional neural network trained on pairs of low- and high-resolution images, so it learns to rebuild sharp edges and fine lines instead of just blurring them.
We use super-resolution networks from the open-source WebSR project, based on Anime4K, with weights trained separately for real-life footage, animation and 3D content. Choose Fast for long clips or slower computers, and Best when quality matters most.
The networks are small enough to run in real time on a laptop, so they sharpen and clean up rather than invent detail. Heavily blurred or very noisy footage will look cleaner, but it will not turn into studio-grade 4K.
Yes. There is no signup, no watermark and no limit on the number of videos. The upscaling runs on your own computer, so it costs us almost nothing to offer.
No. The video is decoded, upscaled and encoded inside your browser. It never leaves your device.
Yes. The upscaler doubles the width and height, so a 1920×1080 video becomes 3840×2160 (4K UHD). Inputs above 1080p are not supported because the result would be larger than 4K.
Any browser with WebGPU: current Chrome and Edge on Windows, macOS and ChromeOS, and Safari 26 on macOS, iOS and iPadOS. A computer with a dedicated or recent integrated GPU is fastest.
It depends on your graphics card, the resolution and the quality setting. On a typical laptop, a 720p clip upscales at a few to a few dozen frames per second. The progress bar shows the time left.
Yes. The original audio track is copied into the new file without re-encoding when possible.
Yes, use the free AI image upscaler. It runs the same networks on photos, drawings and screenshots and saves a PNG.