Thumbnail Viewer, Resizer & Studio for YouTube™

Preview, inspect, and resize YouTube™ video thumbnails in Full HD (1280x720), test feed mockups, and inspect SEO metadata.

Preview, inspect, and resize YouTube™ video thumbnails in Full HD (1280×720), test safe zones in live feed mockups, and analyze video SEO metadata in one click. Thumbnail Viewer, Resizer & Studio for YouTube™ is a lightweight visual design and metadata inspection utility for video creators, designers, and marketers. It adds a quick "View HD Thumbnail" studio button to the YouTube watch bar and provides an instant toolbar popup preview for the active video. Key Creator Features: • Instant Toolbar Popup Inspector: Click the extension icon on any public YouTube™ video, Shorts, or Live stream to preview its 16:9 thumbnail frame and resolution details. • 1-Click Creator Studio Workflow: Open any video thumbnail directly in our browser-based Creator Studio to: - Inspect Full HD (1280×720), Standard (640×480), High (480×360), and Medium (320×180) aspect ratios - Resize & crop thumbnails on an interactive 16:9 canvas with Rule-of-Thirds grids and automatic under-2MB optimization for YouTube Studio - Preview how thumbnails look inside realistic Desktop, Mobile, and TV feed mockups (Light & Dark mode) - Inspect public video SEO tags, descriptions, and chapter timestamps Privacy & Lightweight Performance: • Zero background tracking or personal data collection • Works seamlessly with YouTube Dark Mode and Light Mode • Uses minimal permissions (activeTab only when clicked) Disclaimer: Does not download or stream copyrighted video or audio media. YouTube™ is a trademark of Google LLC. This extension is an independent creator utility.