YouTube Player Resizer

YouTube Player Resizer gives you precise control over the YouTube video player size — perfect for large monitors, 4K displays, and ultrawide screens. FEATURES: • Set custom width (400–2560px) and height (225–1440px) with slider or numeric input • Lock to 16:9 aspect ratio or use auto height mode • Settings sync across devices and persist automatically on every YouTube visit • Works with YouTube's single-page navigation — no page reload needed • Fullscreen and miniplayer modes are fully preserved HOW TO USE: 1. Go to any YouTube video 2. Click the extension icon in the toolbar 3. Adjust width and height sliders 4. Click "Apply" — your player resizes instantly 5. Settings are saved automatically for future visits Lightweight, no external dependencies, no data collection.