Find the best Slots casinos, games, and bonuses with our comprehensive guide

Online Slots – Complete Guide

Slots are now the most favored game among online casino players. Nowadays, millions of people worldwide play online Slots with real money every year.

Take your pick from our recommended list of the best Slots casinos operating legally in your area, claim your online Slots bonus, and spin the reels today!

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3 Great Reasons To Play Online Slots

  • Huge selection of games
  • Play on your mobile phone
  • Massive signup bonuses

How To Play Slots: Quick Start Guide

Online Slots can be a little daunting to beginner players. The symbols, flashing lights, and rules which vary by the game make it tricky to get started. But never fear; CasinoGuide can help you – just follow the steps below to give it a try!

  1. Pick a casino from the list above, sign up, and make a deposit and claim your welcome bonus. Navigate to the Slots games page, choose a game that looks interesting to you and try it out.
  2. Before spinning the reels, assess your game. Identify the win lines, and find out what the wild symbol is and how it works. Are there other special symbols – for example a scatter or bonus?
  3. Next, check to see if there are any features, free spins, or multipliers.
  4. Finally, decide how much to bet on each spin. This will depend on your bankroll and how many spins you want to get for your money. Your bet can be controlled using the coin value, level, and lines options.
  5. You’re ready – time to spin those reels!

Choosing Between Online Slots Casinos

There are a great many Slots online casinos for you to choose from, and that can make it difficult to get going. Starting with a list such as ours is a good way to ensure you’re choosing from the very best Slots casinos that are legally operating in your area with a relevant regulatory license, but how to decide from those?

Fortunately, we rate and review our recommended Slots casinos on a number of different criteria. These can be seen either in the list above, or by clicking through to your prospective casino’s review page. Here’s some aspects of online Slots casinos for you to look out for:

  • Number of games – the vast majority of these will be Slots games, so this figure is a big help in assessing the size of a Slots casino’s library
  • Bonus amount – the best Slots casinos know that competition for loyal players is fierce; you should expect a sizeable bonus for making a deposit
  • RTP percentage – try to ensure you choose a Slots casino offering over 95% RTP
  • Payment options – check that the casino makes and accepts payment using your preferred method to avoid disappointment
  • Check for certifications – the footer of the Slots casino website should display some accreditations and logos which speak to its authenticity

Slots Online: What Is An RNG?

Random Number Generators (or RNGs) are what make online Slots work; they constantly generate numbers which correspond with the symbols on the reels. When you press the spin button, a number is generated, thereby deciding the result of each spin.

An RNG is like a computer program. A series of instructions, called an algorithm or formula, is used for generating the numbers. There will be numerous combinations that simply cannot come about, and each full set of combinations (possible spin outcomes) is called a cycle. However, this doesn’t mean Slots have ‘cycles’ of winning and losing.

It is similar to picking numbers out of a hat. But instead of keeping the number out of the hat and picking again, the number is put back into the hat, and you randomly choose again. The second time, you might pick that same number, or you might not.

Why Play At Slots Casinos Online?

In the past, you could only play Slots when you were fortunate enough to be in an area of legalized gambling such as Las Vegas, Atlantic City or an Indian casino. Now, thanks to online casinos, Slots games can be accessed easily via your computer or mobile phone.

Playing online Slots is simple and entertaining. There’s no need to learn a complex set of rules, or even a strategy. Just sit back and relax as you spin the reels in hope of that life-changing jackpot.

Online Slots Offer Better RTP Percentages

Real-life Slots play used to be dominated by the hunt for ‘loose’ machines that were more likely to pay out. Some players felt that the looser machines were at the front of the casino where passers-by could see them being hit. Others felt that you could only find a loose machine in a bank of tight machines.

With online slots, the hunt is made very simple. You can find out specifically what the average return to player (RTP) percentage is for all online Slots games, and simply choose the highest ones. Online casino Slots will typically offer an RTP of at least 95%, with the best online Slots offering even more. To put that into perspective, consider that the best Slot machines in real life usually offer an RTP of only 90%.

The Vast Selection Of Online Slots Games

It is true that there are many different Slots games to choose from in a real-life casino. But the number of machines is still finite and there may not be any seats available for the game you like to play. Fortunately, this is never a problem with online Slots.

First of all, there is a huge range of online Slots games for you to choose from – varying in complexity, variance, graphical theme, and game mechanics. And just as importantly, any online casino Slots game you would like to play is available 24/7 as long as it is still supported by the provider.

Play Online Slots With Real Money

It is possible to play Slots online without making deposits just by heading to one of the well-known online Slots casinos and using their practice mode. This option is generally available for all the best online Slots. But most players quickly find that this lacks the inherent thrill that comes from playing online Slots with real money.

When you hit that jackpot, you want to be able to claim the money and spend it out in the real world. Playing real money online Slots enables you to do this, whereas any wins accumulated on a free game will disappear as soon as you leave the page.

Online Slots Bonuses

When you’re looking for a casino where you can play Slots online, bonus offers should be at the front of your mind. The great thing about playing online Slots with bonuses is you aren’t necessarily risking any of your own money.

In the majority of cases, you will get the best possible Slots bonus by making a deposit – here at CasinoGuide we’ve collected the best online Slots bonuses in one place for you. All of the best Slots casinos listed above offer fantastic online Slots bonuses as incentives for signing up.

Play Online Slots On Mobile

This is a huge benefit if you are the kind of online Slots player who doesn’t have a great deal of time to sit at home and play Slots games online. Now you can enjoy playing the best online Slots anywhere you like, so long as you have an Internet connection – whether you’re on the bus, at the airport, or in the waiting room.

The number of people playing online Slots on mobile has seen a huge surge in the past few years, and shows no signs of slowing. Now all of the best online Slots game developers are ensuring that their games are compatible with mobile devices. And all the best Slots casinos either offer an app, or more commonly, make their website fully accessible to mobiles.

Explore Our Online Slots Section

Progressive Jackpot Slots Games
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Explore Our Online Slots Section

Slots is the biggest and most popular of all the casino games available online today. So much so, that putting everything onto this one page would be almost impossible!

Check out the other pages in our online Slots section to find out more about the different kinds of online Slots available to you.

Online Slots New Releases

Are you a fully paid up Slots enthusiast? If there’s a new game on the block, you want to be first to know about it! You will also want to know what the latest and greatest Slots games are, who develops them, and what the relevant bonuses are.

Check out our new Slots games page for the latest and greatest online Slots innovations, collected and presented in one simple place! We review each one, assess the features that make it stand out from the rest, and even show you where you can play it.

Online Video Slots

Arguably the most popular kind of online Slots, Video Slots have played a huge part in transforming the game and bringing it into the 21st century. No longer are Slots games limited by sub-par graphics and lack of narrative, as Video Slots bring full HD video and highly arresting visual effects to the genre.

Swing by our online Video Slots page for everything you need to know about this massively popular addition to online casino libraries. Plus, you can grab some top-level bonuses to use when you play on them!

Play Slots Online Free

Sometimes, you just want to play some Slots online without risking any of your hard-earned money. And that’s fair enough, especially if you are a beginner and not used to playing online Slots for real money. They are also good for getting used to a new Slots game and all of its intricacies.

That’s why here at CasinoGuide we have collected together some of the best free Slots games for you to enjoy. No sign up required, no download required (even on mobile) – just head to our page, pick your game, and start spinning!

Free Spins

This is one of the most common online Slots-related offers you will find. Free spins, sometimes also known as extra spins, are easy to understand. They basically offer you the chance to make a certain number of spins on a Slots online game, without using your own money!

Here on CasinoGuide, you can find our recommended list of the very best online casinos with free spins. These are offered by the most reputable and reliable online casinos out there, and often come attached to very generous sign up bonuses.

Progressive Jackpots

A progressive online Slots game is distinguished by its collective prize pool which grows as you (and others) play. If you hit a very rare combination of symbols, you win the pot, known as the progressive jackpot.

Because everyone playing on the same progressive jackpot game pays into the same prize pool, the prize pool can sometimes reach astronomical numbers. There have been several recorded cases where players have won over $10 million! For your chance to win a life-changing sum like this, head over to our progressive jackpot Slots page.

Online Slots Tournaments

These are hugely popular with online Slots players who are looking for a fast-paced and potentially lucrative session on the reels. The concept of Slots tournaments is fairly simple; at the start, you and the other competitors all have a certain amount of credit. Whoever can make the most winnings from this credit within the time limit wins!

The concept is based upon real-life tournaments, and has long been active at online casinos worldwide. Head over to our dedicated page to find the best Slots tournaments online and join in the fun today!

Choose From The Best Online Slots Casinos Today!

Find your perfect online Slots casino today by choosing from our list of recommended operators above. Each one has been thoroughly reviewed and vetted, and best of all offers a fantastic sign up bonus. CasinoGuide only recommends playing at casinos operating legally in your area - it's always best to make sure of this yourself before depositing.

What are you waiting for? Get in on the fun and play online Slots for real money today!