What You Need to Know About Online Slots

Online slots are computerised games that use random number generators to determine outcomes. The software creates billions of possible combinations every second. This ensures that no one can influence a slot’s results.

Most modern online slot machines feature reels and a number of paylines. They also have a range of symbols and bonus rounds.

Random number generator

When you play online slots, the random number generator is the key to fairness. It creates an endless stream of unbiased results, which helps you avoid the pitfalls of superstitions like believing that certain times are luckier than others or thinking that slot games are hot or cold.

This computer-generated algorithm is also used in other gambling games, such as video poker and roulette. However, these algorithms do not take into account entropy, so they are not as accurate as true random numbers. Instead, they use a seed value to generate random results more efficiently.

RNGs are used to determine whether a player wins or loses, so it’s important that they are certified by reputable companies, such as iTech labs. They should also be tested for predictability, internal state, and non-repeatability.


When slots first debuted, they were mechanical and had three reels that spun once a player pressed the spin button. Modern online slot games have a variety of features that make them more fun and engaging, including five-reel reels. These reels fit 3-5 symbols each and offer more winning combinations than their older counterparts.

The random number generators used in modern online slot games ensure that the results of a spin are completely independent from any previous spin. The RNG software randomly selects a number within a fraction of a second and then matches it to the outcome of the spin. This eliminates any bias and allows for more engaging game rounds.

Many people believe that slot machines slow down or ‘make a show’ of the result of a spin, to trick players into thinking they are one symbol away from a win. This is not true, however, and the same math that determines the game round’s result applies to both manual spins and autoplay spins.


The symbols used in online slot games vary from one game to another. They are designed to fit the overall theme of the game. They include standard symbols like diamonds, bars and the number 7. Then there are also scatters, which can trigger bonus games or Scatter payouts. Unlike standard symbols, they don’t have to land on a payline to award a payout.

Generally, online slots have between 8 and 10 regular paying symbols. They also have wild symbols, which can substitute for any other symbol needed to hit the winning line. This makes the odds of hitting a win even higher than they would be with standard symbols alone. These symbols can also act as multipliers for the amount of money you’ll get.


Paylines are one of the many factors that affect your chances of winning in online slots. They are patterns of symbols that must appear on the reels in a specific order to award a payout. These lines can be horizontal, vertical, diagonal, or even in a zig-zag shape and vary in prize value.

Modern online slot games give players more opportunities to personalize their gameplay, including paylines and reel configurations. These features can increase your winning potential by giving you more ways to line up matching symbols.

In the past, slot machines paid out only if symbols lined up on a single payline running from left to right. Now, they often offer “ways to win” that pay out whenever a symbol appears on consecutive reels.

Bonus rounds

Online slot machines feature bonus rounds that are designed to add excitement and variety to the game. These features are often unlocked at random and require no skill. Players can find out what kinds of bonuses a game offers by inspecting its paytable.

In recent years, some online slots have also included story-based bonus games. These feature plots, characters, and a whole array of added events that make them more interesting to play. These are ideal for keeping players engaged and increasing their chances of winning big prizes.

While these bonus rounds are great, remember to set a budget and always weigh risk vs reward. Additionally, you should take advantage of free spins that casinos offer. These can help you get started without spending any money.