Aspect Ratio Changer for YouTube™

Change the aspect ratio, zoom, and stretch settings of YouTube videos directly from the video player controls.

Aspect Ratio Changer for YouTube™ allows you to easily adjust the video display aspect ratio, zoom, and stretch settings directly inside the YouTube player. Whether you are watching classic 4:3 content, ultrawide 21:9 videos on a standard screen, or 16:9 content on an ultrawide monitor, this extension gives you full control over how your videos are framed and scaled. FEATURES • 21 carefully calibrated aspect ratio presets (including 4:3, 16:9, 16:10, 21:9, 14:9, 5:4, and custom vertical/horizontal scaling) • Seamless native integration right in the YouTube video control bar • Quick one-click selection menu with live transformation preview • Intelligent keyboard navigation support (Enter, Space, Escape) • Lightweight and zero-lag performance with zero external runtime dependencies HOW TO USE 1. Open any video on YouTube. 2. Click the new Aspect Ratio icon in the bottom player control bar (next to Settings). 3. Select your desired aspect ratio preset from the dropdown menu. 4. The video immediately scales and centers to your selected framing. PRIVACY & PERMISSIONS This extension does not collect, store, or transmit any user data, personal information, or browsing history. All adjustments happen entirely locally on your device. • Matches "https://www.youtube.com/*" and "https://youtube.com/*" strictly to render the aspect ratio selector button and scale the video container. SUPPORT Found an issue or have a feature request? • Open an issue on GitHub: https://github.com/thienlhh/youtube-aspect-ratio • Contact: kaoxofu@gmail.com TRADEMARK DISCLAIMER YouTube is a trademark of Google LLC. This extension is an independent project and is not affiliated with, sponsored by, or endorsed by Google LLC or YouTube.