4K technology refers to displays with a horizontal resolution of approximately 4,000 pixels, around 4 times the resolution of 1080p Blu-ray. While 4K TVs are now widely available, there is still a lack of native 4K content available. This poses new challenges for web developers to design websites that can adapt to the higher resolutions of 4K and ultra-high definition screens. Developers must use responsive design and scalable technologies like vector graphics to ensure websites display properly across an increasing variety of device screens, including 4K televisions and their built-in browsers. As 4K adoption increases over the next 5 years, it will drive further innovation from web designers and developers.