The Best Online Slots 2021 - Play Top Real Money Slot Games


You can play the best real money slots in minutes with any of the shortlisted casinos on this page. With hundreds of slot machines and progressives from top providers like Microgaming, NetEnt and BetSoft, these online casinos offer lucrative slots bonuses to get you started on your game. Read on to get key tips for playing online slots for real money on your desktop or mobile device.

Most Popular Slots Game

Ancient Gods

4.5/5

Casino.org player ratings

Best Online Casinos for Real Money Slots 2021

#1 Top Rated Casino
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Payout 1-5 days
Win Rate 98.56%

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2
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  • Choice of 2 craps titles
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Win Rate 97.82%

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Payout 8 days
Win Rate 97.87%
5
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Win Rate 97.64%
6
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Win Rate 97.59%
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Win Rate 97.79%
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Win Rate 97.89%
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Win Rate 97.81%
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Payout 1-3 days
Win Rate 97.18%

Browse Our Full List of Slot Reviews

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    The latest slots casinos on our blacklist

    Every now and again, we come across a casino that we recommend you avoid playing on. We have a strict 25-step review process, looking at things like a site’s software, promotions, how easy the banking process is, security and more. When any of these steps fall below our standards, the casino is added to our blacklist.


    • Cool Cat
      2/10
      • Reports of rigged games
      • Janky playing experience
      • Hidden wagering requirements on bonuses
    • Grand Prive
      2.3/10
      • Unfair RTP not giving players a fair chances
      • Technical problems being reported
      • Reports of unsafe software used on site
    • Planet 7
      1.2/10
      • Not paid players their winnings
      • Plagiarised games software
      • Low game standard on site

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    What A Top Slots Casino Offers You


    A Huge Range of Slots You Can Play For Fun

    All the shortlisted online casinos here offer a great variety of slot machines for players to enjoy, including classic and video variations with plenty of different themes to choose from. You can expect a thrilling experience with any slots game online, with a range of top 3 reel and 5 reel titles. We look out for casinos that offer plenty of free slots, so you can spin just for fun, and great real money games if you favour the thrill of gambling.

    Range of Slots

    Solid Games Software That Offers Fair Games At Secure Sites

    The best gambling sites will of course have games software from top developers, such as Playtech, BetSoft and Microgaming. You can be sure to find slots with great graphics and plenty of dynamic features that will run smoothly, whether it’s a desktop, iPhone or mobile device that you’re using. When you play online slots for real money, you'll want to be reassured that your money is in good hands. You can rely on our recommendations being licensed by the relevant gaming authorities, and guaranteeing a fair game using random number generators to put out those winning combinations on the reels.

    Software and Security

    Great Welcome Bonuses to Use on High Payout Slots

    A generous welcome bonus is a must for any reputable online casino. This is particularly true when it comes to slots, so you can get in plenty of extra spins. All our top-rated sites offer excellent bonuses for a great start to your online slots experience. The games themselves all offer high payout percentages to give you the best return on your bet, and cashing out any big win is very easy with all popular banking options. If you’re a winner, you can expect any funds to be in your account within hours.

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    An All-round Great Experience Playing Slots Online

    As long as the slots games deliver on all of the points noted above, the casino will be added to the shortlist here, giving players the choice of the very top casinos online. You can be sure that you'll get the best slots games and variety of titles for desktop and mobile gaming, as well as bonus rewards and handy customer support if required. We put all our recommendations through a 25-step reviews process and check them every three months to make sure they are still delivering on quality games.

    4.2 /5

    Real Money vs. Free Games

    While free slots are a great way to play just for fun and to hone your skills before spending real cash, nothing quite compares to the thrill and excitement of real money gambling. As you can see from the table below, both real money and free games come with their own advantages and disadvantages.


    Real Money slots

    Players have the opportunity to win huge sums of cash, adding a massive element of anticipation to the gameplay

    Real money players are rewarded with welcome bonuses, free spins and loyalty rewards

    Real money gaming can see players lose huge sums of hard-earned cash if they don't play responsibly

    Players have the opportunity to play for progressive jackpots

    Payouts sometimes won't be received instantly, and will instead take a few days depending on the casino

    Free Games slots

    Available to play instantly with no app download or sign-up required

    Give players the chance to try games out before spending their money

    Free play gamers often do not qualify for casino bonuses and loyalty rewards

    Can be played anonymously with no need to divulge personal information or bank details

    Players miss out on the chance to win huge jackpots and other big prizes

    Real Money slots Free Games slots

    Players have the opportunity to win huge sums of cash, adding a massive element of anticipation to the gameplay

    Available to play instantly with no app download or sign-up required

    Real money players are rewarded with welcome bonuses, free spins and loyalty rewards

    Give players the chance to try games out before spending their money

    Real money gaming can see players lose huge sums of hard-earned cash if they don't play responsibly

    Free play gamers often do not qualify for casino bonuses and loyalty rewards

    Players have the opportunity to play for progressive jackpots

    Can be played anonymously with no need to divulge personal information or bank details

    Payouts sometimes won't be received instantly, and will instead take a few days depending on the casino

    Players miss out on the chance to win huge jackpots and other big prizes

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    Review process

    6

    Each review process takes around 6 staff members, 3 hours each

    Reviewing casinos

    40+

    Reviewing casinos across 40+ countries

    online and land based casinos

    400+

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    4.4/5 for online casinos

    4.4/5

    With an average rating of 4.4/5 for online casinos in 2021

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    The Various Types of Slot Machines

    In the world of online gambling, there are four distinct categories of slot games that you need to be aware of. Online slots range from the classic three-reel games based on the very first slot machines, to all singing, all dancing video slots that come jam-packed with bonus features and exciting new ways to win. Take a look at the slot varieties below for an introduction to each of the four main types of slot machines.


    Three Reel Classics

    Old-school slot machines, featuring the usual assortment of aces, lucky horseshoes and wild symbols. Here you need to line up three matching symbols on a single payline. Just set your coin value and away you go.

    Three Reel Classics

    Here are the Best Rated Online Slots to Play in 2021

    We understand the task of picking a good slot machine can be tricky with so many options available. When trying to uncover what is the most popular slot machine, high payouts and high jackpots are always important. Titles that do this include Thunderstruck, Mega Fortune and Wizard of Oz. We have summarized our top slot picks in the table below.


    Slots Strategy

    Online slots are entirely reliant on chance, but that doesn’t mean there aren’t things you can do to put yourself in a better position to win. Experienced players follow a distinct strategy, like only playing games with the highest payout percentages, practicing their bonus rounds, and knowing their paylines inside and out. Follow these guides to give yourself the best possible chance to win jackpots on slot machines online.

    Learn more to win more with our game guides

    Find out how to play or improve your skills and discover everything you need to wager and win on the most popular online casino games.

    Payout percentage

    What is a payout percentage?

    As a slots player, the payout percentage tells you how much of your money bet will be paid out in winnings. This means you can work out how much you could win on average. For example, if a slot game payout percentage is 98.20%, the casino will on average pay out $98.20 for every $100 wagered. This is also known as Return To Player (RTP). We outline the RTP for each casino we rate so you can find the payout percentage on a slot machine easily.

    The Best Payout Slots in 2021

    The following slots are ordered in terms of highest payout percentage:


    • 1
      Avalon II - 97%
    • 2
      Guns ‘n’ Roses - 96.98%
    • 3
      Thunderstruck II - 96.65%
    • 4
      Wheel of Fortune - 96.6%
    • 5
      Mega Fortune - 96.4%
    • 6
      Starburst - 96.1%
    • 7
      Wizard of Oz - 95.99%
    • 8
      Flaming Hot - 95.53%
    • 9
      Book of Ra Deluxe - 95.5%
    • 10
      Triple Diamond - 95.06%

    Quick Strategy Tips


    • Go for smaller jackpots

      Opt for games with smaller jackpots, over massive progressive prizes. The allure of a big win is understandable but you're far more likely to be a winner this way.

    • Give the classics a try

      Simpler slot games tend to have a higher payout percentage. Sometimes it's worth sticking with the classic alternatives, even if that brand new video slot looks exciting!

    • Stick to safe sites

      Only play online slots for real money at reputable, trustworthy online casinos. If you're ever in doubt, head to Casino.org to find top rated sites.

    • Look out for bonus rounds

      Keep your eyes peeled for enticing bonus rounds. This is where you'll find free spins and jackpots and knowing your paylines means knowing your chances of winning.

    Meet the Games Makers

    Online casinos offer an expansive range of video slot titles, many of which come from a handful of industry-leading software developers. When it comes to video slots, these guys really know their stuff. Here are some of our favorites to look out for.


    • Real Time Gaming
    • Playtech
    • Microgaming
    • Aristocrat
    • IGT
    • NETent
    • Novomatic
    • Merkur
    • NYX
    • Cryptologic
    • Belsoft

    Is It Time To Play Slots Online?


    Now you know all there is to know about online slot machines, it might be time to try them out for yourself. Head to our list of top rated online casinos for 2021 to discover the best slots and most exciting casinos. Whether you're playing for the big bucks or you simply want to try out a few free games, you'll find the right ones for you here at Casino.org.

    Gonzo's Quest

    4.5/5
    • Exciting adventure-themed slot from SG Gaming
    • Play more gold symbols to win more cash
    • Play 243 ways to win for added excitement

    Top ranked casinos to play this slot for real money

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    Slot Game Reviews

    Still want a little more information before choosing your game? Check out our slot reviews to discover one that’s just right for you.

    Frequently Asked Questions


    How do online slots work?

    The basic concept of spinning the reels to match up the symbols and win is the same with online slots as it is in land based casinos. The key difference playing slots online is that the variation of games will be wider, and you'll find that most online slots offer more reels and paylines, so your chances of netting a winning combination increases.

    Can I play slots for free?

    Yes. Every reputable online slots casino will offer players the option to play some free slot games. This means you won't have to deposit any money to get started, you can simply enjoy the game for fun. But, you won't win any either. Despite that, playing free online slots is a great way to get a feel for casino slot games before you advance to wagering with real money.

    What should I look for in an online slot casino?

    After security and legitimacy (there are unfortunately a lot of rogue online casinos out there) you want to look at the payout percentage of an online slot. This is the percentage of the wagers paid in that the casino pays out in winnings. This is especially important if you're planning on playing for real money. A higher payout percentage generally means more money back in your pocket.

    What’s a progressive jackpot?

    This is a jackpot that builds up over time and then pays out a big sum of money to a single player. Most online slots casinos offer progressive jackpot slots so it's worth keeping an eye on the jackpot total and how frequently the game pays out.

    Can I win real money playing online slots?

    Yes you can. While online casino slots are ultimately a game of chance, many players do frequently win decent sums, and some lucky ones even score life-changing payouts. If you're in it for the big bucks, progressive jackpot slots will probably suit you best.

    Are online slot casinos trustworthy?

    Absolutely. Provided you play at a recommended online slots casino, and avoid any blacklisted sites, your personal details and your money will stay perfectly safe online. We independently test and verify every online casino we recommend so selecting one from our list is a good place to start.

    How do welcome bonuses work?

    Welcome bonuses reward players when they make their first real money deposit. The exact terms and requirements vary from casino to casino and some offers that seem too good to be true probably will be. Before you commit your cash, we recommend checking the wagering requirements of the online slots casino you're planning to play at. These will explain how much of your money you're required to deposit upfront, and what you can expect to receive in return. The best bonuses will offer large payouts on minimal deposits.

    Which online slots payout the most?

    Progressive slots games pay out the most money, with Mega Moolah being the record breaker at €18,910,668.01. Our list of top rated online slot casinos show you the recommended games paying out real money. There are a huge variety of online casino slots paying out varying sums. These include classic three-reel slots, multi payline slots, progressive slots and video slots.

    How do I pick a winning slot machine?

    To try improving your chances of winning a jackpot, choose a progressive slot game with a fairly small jackpot. These games pay out most often. Another method is to pick simpler games. If a game is complex and exciting, software developers have spent more time and money to build it. This could mean frequent wins are less likely. Either way, the slot machine will still be fair and random.

    Are online slots rigged?

    No, all regulated online slot machines are completely fair. The results are random every time, meaning that nothing in the game is rigged. To ensure fair play, only choose slots from approved online casinos, such as those we list on this page. Playing at any of these will give you a fair chance of winning.

    How do I pick a good slot machine?

    You need to make sure you are playing slots with high Return to Player (RTP) percentages, advantageous bonuses, good overall ratings and a theme you appreciate. Check out our recommended slots to play in 2021 section to make the right choice for you.

    What is the best online slot site?

    The one that offers the biggest payouts, jackpots and bonuses along with exciting slot themes and a great player experience. To find out our top casino for this month head to our toplist.

    Discover the Best Slots Sites Online

    Check out our handy table below, listing the top casinos to play slots games on. Our experts have gathered some of the top information so you can make the best decision for you when you decide where to play slots online.


    Rank Casino Bonus Offer Number of Games Payout Speed Win Rate Play Online
    #1
    Red Dog Casino
    $6,000
    220+
    1-5 days
    98.56%
    #2
    Slots.lv Casino
    $5,000
    400+
    1-2 days
    98.45%
    #3
    Intertops Casino
    $5,000
    200+
    1-2 days
    97.82%
    #4
    Lincoln Casino
    $5,000
    150
    8 days
    97.87%
    #5
    Slotocash
    $7,777
    120
    8 days
    97.64%
    #6
    VIP Slots Casino
    $1,000
    -
    2 - 3 days
    97.59%
    #7
    Gossip Slots Casino
    $9,300
    120
    2-12 days
    97.79%
    #8
    Lucky Creek
    $4000
    -
    1-3 days
    97.89%
    #9
    Ignition Casino
    $4,500
    200
    1-3 days
    97.81%
    #10
    Wild Casino
    $5,000
    -
    1-3 days
    97.18%