HD or high definition is the most common quality of video shot in porn these days. It outranks DVD / Standard Definition and any technology before that. With high definition quality, you're going to see all the detail when you're watching porn videos on sites that support it. There are variations of high definition quality which means not two types are the same. The first being 720p, which offers resolutions up to 1280 x 720 and was the first level of HD utilized a number of years ago. After that, 1080p was introduced, bringing video resolutions up to 1920 x 1080 which became to the go to quality level in the adult industry in the last few years. What's best is next to come with 4k UHD or ultra-high definition on its way! I can see several porn sites adapting to this level of quality in the near future. We have some of the best high definition sites reviewed for your convenience. Below, you can see our top 3 picks which are safe bets - sites we know you're going to like. Below that is our review table which shows, in order, which ones we'd join based on an overall score. Use that to help get a better idea of which site you should join. Good luck!