Owl is described as 'Transforms webpages with a comfortable dark theme on-the-fly, protecting your eyes from the glaring color schemes on most websites. Owl comes bundled with a ton of features. With Owl, you can:' and is a dark mode enforcer in the web browsers category. There are more than 10 alternatives to Owl for a variety of platforms, including Mac, Google Chrome, Mozilla Firefox, Windows and iPhone apps. The best Owl alternative is Dark Reader, which is both free and Open Source. Other great apps like Owl are Midnight Lizard, Noir, Dark Background and Light Text and Hush: Screen Share Focus.