Online casinos, also known as virtual casinos or internet casinos are online versions of traditional ("brick and mortar") casinos. Online casinos enable gamblers to play and wager on casino games through the Internet.

Online casinos generally offer odds and payback percentages that are comparable to land-based casinos. Some online casinos claim higher payback percentages for slot machine games, and some publish payout percentage audits on their websites. Assuming that the online casino is using an appropriately programmed random number generator, table games like blackjack have an established house edge. The payout percentage for these games is established by the rules of the game.

But whatever the feature is on a certain casino online games, the most important is to determine which the most trusted online casino among others is. Web-based online casinos are websites where users may play casino games without downloading software to the local computer. Games are mainly represented in the browser plug-in Adobe Flash, Adobe Shockwave, or Java and require browser support for these plug-in. Also, bandwidth is needed since all graphics, sounds and animations are loaded through the web via the plug-in. Some online casinos also allow game play through a plain HTML interface. Whatever it is, online casinos are undeniably one of the obvious innovation we have these days.