Youtube Thumbnail Grabber

Extracts the still thumbnail images for any YouTube video and shows them in five resolutions: Default (120x90), Medium (320x180), High (480x360), Standard (640x480), and Max Res (1280x720). Paste a YouTube URL or an 11-character video ID, and the tool resolves it against multiple URL formats and displays each thumbnail with Copy URL and Open buttons.

1. Paste a YouTube link or raw video ID into the URL input — accepted formats include youtube.com/watch?v=, youtu.be/, youtube.com/shorts/, youtube.com/embed/, and youtube.com/v/. 2. As you type, the parsed video ID is shown beneath the input; if the URL does not match any known pattern, an "invalid URL" error appears. 3. Scroll the thumbnails list and use Copy URL to copy the img.youtube.com JPG link for that resolution, or Open to open it in a new tab. 4. Click the thumbnail image itself to open it directly.

parseVideoId tries six regex patterns in order — watch, youtu.be, shorts, embed, /v/, and any ?v= or &v= query parameter — each requiring exactly 11 characters from [a-zA-Z0-9_-]. If none match and the trimmed input is itself an 11-character ID, it is accepted directly. The five thumbnails come from the fixed URL pattern https://img.youtube.com/vi/<videoId>/<quality>.jpg where quality is one of default, mqdefault, hqdefault, sddefault, or maxresdefault. Note that maxresdefault and sddefault are not always generated by YouTube — if a video has no high-resolution thumbnail, that image will return a 404.