LocalUpscale is a browser-based AI video upscaler that enhances short clips without uploading them to a server. The video is processed on your own device: choose a picture mode and an output size, compare the same frame before and after, and download the finished MP4. Free use covers the first 30 seconds of each video with no account and no limit on the number of runs, which is enough to judge the result on a representative clip. A one-time unlock of $9.99 removes the duration cap permanently, with no subscription, while the same format, resolution, and device limits still apply. Outputs keep the original aspect ratio and can stay at the original size or go to 2x, 1080p, 4K, or 8K, up to 4x enlargement, and supported original audio is retained. Inputs up to 1080p are accepted, including portrait video, and a recent desktop Chrome or Edge browser with an H.264 MP4 works best. It suits anyone reviving an old home video, a low-resolution recording, or a short clip that looks too small in a larger edit, since the before-and-after comparison makes it easy to decide whether the enhanced version is actually better.