Please help improve it or discuss these issues on the talk page. Some of this article’s listed sources may not be reliable. Please internet casino this article by looking for better, more reliable sources.

Unreliable citations may be challenged or deleted. This article needs additional citations for verification. Online casinos generally offer odds and payback percentages that are a bit higher than land-based casinos. Some online casinos claim higher payback percentages for slot machine games, and some publish payout percentage audits on their websites. Online casinos can be divided into two groups based on their interface: web-based and download-only casinos.

Download-based online casinos require the download of the software client in order to play and wager on the casino games offered. The online casino software connects to the casino service provider and handles contact without browser support. Download-based online casinos generally run faster than web-based online casinos since the graphics and sound programs are cached by the software client, rather than having to be loaded from the Internet. This determines the order of the cards in card games, the outcome of a dice throw, or the results produced by the spinning of a slot machine or roulette wheel. When implemented correctly, a PRNG algorithm such as the Mersenne Twister will ensure that the games are both fair and unpredictable.