To watch Netflix on an ultrawide monitor without black bars, you need a browser extension that forces the video player to fill your screen. This is the only reliable way to eliminate pillarboxing and windowboxing when streaming Netflix on an ultrawide monitor, as the service itself does not natively support ultrawide aspect ratios.
Why Netflix shows black bars on your ultrawide monitor
Netflix content is produced in a variety of aspect ratios. Most TV shows are shot in 16:9, films often use widescreen ratios like 2.39:1 or 1.85:1, and some Netflix originals are created in 2:1. Ultrawide monitors typically have a 21:9 or 32:9 aspect ratio, which is significantly wider than these common formats. Because Netflix's web player centers the video within the browser viewport and does not support ultrawide displays, the mismatch causes black bars on the sides, a phenomenon called pillarboxing. When the content itself already has letterboxing (black bars on top and bottom), you end up with windowboxing, where black bars appear on all four sides of the image.
The quick fix: browser extensions for Netflix ultrawide monitor viewing
The direct answer to watching Netflix on an ultrawide monitor without black bars is to use a browser extension. These lightweight tools override the Netflix player's default behavior and adjust the video to match your screen's width. Reputable extensions include UltraWideo, Netflix Ultrawide+, and Ultrawide Netflix. All three are available for Chrome, Firefox, and Edge.
- Open your browser's extension store (Chrome Web Store, Firefox Add-ons, or Edge Add-ons).
- Search for the extension name, UltraWideo, Netflix Ultrawide+, or Ultrawide Netflix.
- Click "Add to browser" and confirm the installation.
- Navigate to Netflix.com, sign in, and start playing any title.
- Click the extension's icon in your browser toolbar to activate it.
- The video will now expand to fill your entire ultrawide screen.
Upscale vs stretch: choosing the right display mode
Most Netflix ultrawide extensions offer two display modes. Upscale mode enlarges the video proportionally to fill the screen with minimal cropping. This is ideal for 16:9 content on a 21:9 monitor, as it crops a small amount from the top and bottom while keeping the image sharp and undistorted. For films shot in 2.39:1, upscale mode will fill the width without any cropping because the content is already wider than 16:9. Stretch mode forces the video to fill the full width of the monitor, but it does so by distorting the image, objects and people will appear horizontally squashed. Stretch mode is rarely recommended because it ruins the intended composition of the content.
Getting the best resolution: Edge vs Chrome for Netflix
If you want the highest possible resolution while using an ultrawide monitor with a Mac or PC, the browser you choose matters. Microsoft Edge on Windows can unlock 4K Netflix playback on supported hardware, while Chrome generally caps playback at 1080p. To check your current streaming quality, press Ctrl+Shift+Alt+S (or Command+Shift+Option+S on macOS) to open the hidden quality menu. This menu displays the actual bitrate and resolution being delivered. If you have a compatible 4K monitor and a Netflix plan that supports Ultra HD, using Edge will give you sharper, more detailed visuals than Chrome.
Troubleshooting common Netflix ultrawide problems
Even after installing an extension, you may encounter a few issues. If black bars remain, the extension may not be activated, click its icon to ensure it's running. Some content, particularly older films, may have fixed letterboxing baked into the video file itself; in this case, the extension can only remove pillarboxing, not the embedded bars. Subtitle alignment can also be problematic on ultrawide screens. If subtitles are pushed off-screen or positioned awkwardly, you can change subtitles size on Netflix through the account settings under "Subtitle appearance" to adjust their placement. For persistent playback quality issues, check that your internet connection meets Netflix's recommended speeds and that your browser is up to date.
Keyboard shortcuts for Netflix on an ultrawide monitor
Mastering these shortcuts will make it easier to view videos in fullscreen on an ultrawide monitor and control playback without reaching for your mouse. The hidden quality menu (Ctrl+Shift+Alt+S) lets you manually select bitrate and resolution. The F key toggles fullscreen mode. The Spacebar pauses and resumes playback. Arrow keys seek forward or backward by 10 seconds; holding Shift while pressing an arrow key seeks by a single frame. The S key toggles subtitles on and off. The same keyboard shortcuts apply in the YouTube player, though you'll need a separate extension for that service. For Disney Plus, the approach is similar: you can get Disney Plus to play in fullscreen on an ultrawide monitor by using a dedicated browser extension designed for that platform. These shortcuts and extension methods give you full control over your ultrawide viewing experience across all major streaming services.
For the wider topic, see use an ultrawide monitor with a mac.
