I built a free YouTube thumbnail downloader + cover enhancer (no login, runs in your browser)

I wanted a dead-simple way to grab YouTube thumbnails in full resolution and turn them into custom covers—without signing up, without watermarks, without leaving the browser. So I built ThumbGrab. 1. Download any thumbnail in every resolution maxresdefault (1280×720 HD) sddefault (640×480) hqdefault (480×360) mqdefault (320×180) default (120×90) If maxres doesn't exist (creator didn't upload a custom thumbnail), it auto-falls back to the next best quality. 2. A built-in Cover Enhancer Add your o