
Click it to continue watching a 4K version of the video in another app. Look out for the 4K badge on the toolbar icon. Now, when you watch YouTube videos in Safari, the extension will let you know if there’s 4K quality available.


Most modern MacBook and iMac models have native resolution higher than 1080p. You don’t even need a 4K TV or monitor to benefit from this app. This way you can open any page (not just YouTube videos) in Google Chrome, Mozilla Firefox, Microsoft Edge, Opera or another app. Click the toolbar button to open the video in another web browser and enjoy it in full 4K glory. 4Ktube Extension shows a 4K badge in Safari toolbar if a YouTube video you’re watching offers quality higher than 1080p. YouTube does not support 4K playback in Safari for some videos.
