Best Online Slots

Top slot games + which casinos to play at

  • spin-and-win

    1

    100% Up To

    £500

    +100 Free Spins!

    318reviews

    Mobile Tablet Friendly

    Full PayPal Support
    Rapid Withdrawals
    Slots Specialists

    100% Up To

    £ 500

    +100 Free Spins!

    318 votes

    New customers only. Terms and conditions apply. Please gamble responsibly. 18+. The minimum deposit for each bonus is £20 and maximum bonus amount is £500 on the 1st deposit and £250 on the 2nd and 3rd deposits. If a player ticks “I do not want a bonus” the bonus is forfeited. Once you have made your first deposit, your play balance will be credited with a bonus worth the same amount of your deposit up to £500. 100 free spins will be credited in 5 batches of 20. The first batch is credited together with the deposit bonus, the other 4 batches on the consecutive days following your first deposit. Players have to log into their account in order to activate the free spins for a particular day. Once you have made your second deposit, your play balance will be credited with a bonus worth the same amount of that deposit up to £250. You will need to wager a total amount of 30x the combined value of your deposit and bonus.
  • aspers

    2

    Enjoy Up to

    £1,000

    Welcome Bonus

    430reviews

    Read Review

    Mobile Tablet Friendly

    Full PayPal Support
    Great Bonus Offer
    Excellent Live Casino

    Enjoy Up to

    £ 1,000

    Welcome Bonus

    430 votes

    Read Review
    New customers only. Terms and conditions apply. Please gamble responsibly. 18+. 1st Deposit – 100% bonus up to £200 & 100 free spins on Netent slots. 2nd Deposit – 50% bonus up to £300. 3rd Deposit – 50% bonus up to £500. Wagering requirement is 25 times the sum of your deposit and bonus amount received. Deposit amount can be withdrawn at any time, however bonus and bonus wins will be forfeited.
  • dunder

    3

    200 Free Spins +

    £600

    Welcome Bonus

    467reviews

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    Mobile Tablet Friendly

    Excellent Graphics
    Great Bonus Offer
    Huge Range of Games

    200 Free Spins +

    £ 600

    Welcome Bonus

    467 votes

    Read Review
    New customers only. Terms and conditions apply. Please gamble responsibly. 18+. Dunder offers 3 deposit bonuses for new customers ranging from 25% to 200%. You'll also get 200 free spins.
  • casumo

    4

    100% Up To

    £300

     Welcome Package

    248reviews

    Read Review

    Mobile Tablet Friendly

    Prizes Every Day
    Slots and Table Games
    New & Modern Casino

    100% Up To

    £ 300

     Welcome Package

    248 votes

    Read Review
    New customers only. Terms and conditions apply. Please gamble responsibly. 18+. 20 free spins in Starburst on registration. Bonuses are on opt-in basis. Min deposit is £10. 30x wagering requirements apply for bonuses and winnings to be withdrawn. Contribution % towards WR vary from 0% to 100% according to game. Participation of new customers in the Welcome Offer requires a £10 minimum deposit.
  • mansion

    5

    Enjoy Up to

    £500

    Welcome Bonus

    501reviews

    Read Review

    Mobile Tablet Friendly

    Full PayPal Support
    Slots and Table Games
    Excellent Live Casino

    Enjoy Up to

    £ 500

    Welcome Bonus

    501 votes

    Read Review
    New customers only. Terms and conditions apply. Please gamble responsibly. 18+. Min deposit £20 max bonus amount £500. First deposit: 100% up to £200. Second deposit: 50% up to £300. Wagering 40x for each bonus. Game weighting applies. Cashback: 5% cashback on first and all other deposits during week 1, 10% cashback on all additional deposits taking place in week 2 only. Bonus betting limits: slots - $/£/€5 all other games – 10% of bonus amount.. T&Cs apply
  • casimba

    6

    Enjoy Up to

    £5,000

    Welcome Bonus

    432reviews

    Read Review

    Mobile Tablet Friendly

    Excellent Live Casino
    Classic & Video Slots
    Great Bonus Offer

    Enjoy Up to

    £ 5,000

    Welcome Bonus

    432 votes

    Read Review
    New customers only. Terms and conditions apply. Please gamble responsibly. 18+. 1 bonus offer per player. Min. deposit £20. Max. bonus bet is £5. Bonus spins on selected games only and must be used within 72 hours. Bonus funds expire in 30 days, unused bonus funds will be removed. Bonus funds are 200% match up to £5000 on your 1st deposit, 50% match up to £1000 on your 2nd deposit, and 75% match up to £500 on your 3rd deposit. Bonus funds are separate to Cash funds, and are subject to 35x wagering the total bonus, cash & bonus spins. Terms apply. BeGambleAware.
  • play-ojo

    7

    Up to 50 Free Spins on 1st Deposit

    387reviews

    Read Review

    Mobile Tablet Friendly

    Full PayPal Support
    Prizes Every Day
    Great Bonus Offer

    Up to 50 Free Spins on 1st Deposit

    387 votes

    Read Review
    New customers only. Terms and conditions apply. Please gamble responsibly. 18+. For every £1 deposited, 1 Free Spin will be credited to the players account up to 50 Free Spins (on Rich Wilde and the Book of Dead). Also, after the first deposit the player can claim an additional 30 Free Spins by visiting the Kicker Section. So the player can receive a total of up to 80 free spins. Please refer to the landing page for all the details.
  • slots-million

    8

    100% Up To

    £100

    Welcome Bonus

    451reviews

    Read Review

    Mobile Tablet Friendly

    New & Modern Casino
    Huge Range of Games
    Slots and Table Games

    100% Up To

    £ 100

    Welcome Bonus

    451 votes

    Read Review
    New customers only. Terms and conditions apply. Please gamble responsibly. 18+. Bonus on deposit of 100% up to £100, Not claimable with Skrill, ecoPayz or Neteller, Requires phone verification, Min deposit £20 | 20 Extra Spins per day for 5 days valid 24h. Wagering x48 before withdrawal on each bonus, Bets limited to £3.
  • videoslots

    9

    100% Up To

    £200

    Welcome Bonus

    503reviews

    Read Review

    Mobile Tablet Friendly

    Slots Specialists
    Classic & Video Slots
    Great Bonuses

    100% Up To

    £ 200

    Welcome Bonus

    503 votes

    Read Review
    New customers only. Terms and conditions apply. Please gamble responsibly. 18+. Welcome Bonus (activated once, only when making your first deposit). Wager requirement: 20 x bonus. Number of days: 7 days. Other information: Your bonus money will be paid out in 10% increments.
  • fun-casino

    10

    Enjoy Up to

    £998

    Welcome Bonus

    312reviews

    Read Review

    Mobile Tablet Friendly

    New & Modern Casino
    Great Bonuses
    Play Netent Slots

    Enjoy Up to

    £ 998

    Welcome Bonus

    312 votes

    Read Review
    New customers only. Terms and conditions apply. Please gamble responsibly. 18+. New players only, min deposit £10, wagering 50x bonus amount, max bet £5 with bonus funds. 11 Fun Spins for registration (max withdrawal is £100). 50% up to £499 bonus + 100 Fun Spins on 1st deposit. 50% up to £499 bonus on 2nd deposit. Welcome bonus excluded for players depositing with Skrill or Neteller. Live Casino play excluded with bonus. No max cashout for deposit bonus.

Our approach to online casino reviews

WELCOME BONUS

Start as you mean to go on - with a nice cash injection! We look for healthy deposit match bonuses with reasonable wagering requirements.

DEPOSIT WITHDRAW

Check which currencies, payment methods and countries are supported, plus any limits on processing payments.

MOBILE TABLET

It’s no good if you can’t play on the go – we test all online casinos on a range of devices to make sure they play super smoothly.

GRAPHICS

For a casino to rate highly, it has to look great and play even better. Bonus points for quirky unique designs and well designed interfaces.

SOFTWARE

Good software = good games = good casino. We explore the software options and look for new and popular games and slots.

USER EXPERIENCE

Overall, what are we hearing on the grapevine about this casino? Are their customers happy? We keep our ear to the ground to find out.


Start playing online slots today

  1. Compare slot sites
  2. Use our genius selection of the best slot sites on the market to compare what’s on offer and pick out a favourite.

  3. Sign up
  4. Found one that tickles your fancy? Follow our link to sign up. Creating an account is pretty quick and easy.

  5. Deposit
  6. You’ll need to make a deposit if you want to claim real money slots. Head to the cashier, select your preferred payment method and amount- it’ll need to meet the minimum deposit requirements, remember! Deposits are almost instant at the best sites, though each payment method may have different processing times.

  7. Play
  8. Once the funds are cleared you’re good to go. Pick out a slot game and start spinning. Good luck!

Why play online slots?

Wondering what’s so special about slots? Here’s what you can expect from this popular casino game.

Choice

The best online casinos have hundreds of different slots titles in their libraries, with some boasting over 500 different games. From classic 3-reel fruit machines to picture-perfect video slots, you’re spoilt for choice. Mix pop-culture with your online slots gameplay thanks to TV, film and music branded slots like NetEnt’s Jimi Hendrix reels, Playtech’s Rocky slots and CSI slots from IGT. Obviously, this vast selection doesn’t mean that every game is right for you- even if its reels are themed around your favourite blockbuster. Other factors, like minimum bets, paylines and mobile compatibility are important, too! We’d recommend using free demo slot games to give titles a try before you put real money on the line.

Simplicity

The essence of slots is simple: spin the wheels and score matching symbols to land a win. There’s no secret strategy or skill to perfect; everything comes down to chance. This puts everyone in the same boat, whether you’ve been playing slots for years or are spinning the reels for the first time. Of course, this can be a little frustrating when there’s real money on the line, but that’s just part and parcel of this casino game.

Higher RTP

The return to player (RTP) percentage of slots tends to be pretty high- most are in excess of 90%, but we’d say the best slots to play have an RTP of over 96%. This means that, in theory, you stand to win back 96% of your total spend. It goes without saying that, given that RTP based on an infinite number of spins, you could win more or less than this at any given time.

Online slot variations

Picking slots isn’t as simple as choosing a title or theme that appeals to you. There’s a number of different variations to consider when finding the slot game for you, as each variation can have an impact on gameplay and potential payouts . Here’s the key criteria when it comes to differentiating online slots.

Classic slots - These are most similar to traditional fruit machines. Classic slots tend to have three reels across which you must match symbols in a straight line. The simplicity of these slots makes them ideal for beginners, but the limited paylines gives you less opportunity to score a win on a single spin.

Video slots- Video slots make up the majority of slots you’ll find online. This is where you’ll find cutting edge 3D graphics, moving wild symbols and wacky themes, as well as multi-directional paylines that give you even more chances to win on the reels. Of course, slots is a game of chance, so while betting on more paylines gives you more opportunities to land a winning combination, you aren’t guaranteed the jackpot.

Progressive slots- Slots don’t usually offer the chance to win big, unless you’re playing slots with pooled progressive jackpots. These prize pots grow bigger each time a player spins the reels, and can reach some pretty dizzying heights before they burst. In fact, Microgaming’s Mega Moolah slot paid out a massive £13,209,300 in 2015, earning a world record title.  You’ll often need to fulfil certain criteria before you can win the jackpot, such as completing a bonus round or wagering a specific number of coins, so it’s not as easy to win big as you might first expect.

How to play slots

It’s pretty easy to get to grips with online slots, even if you’ve never played before. Want to be sure you’ve got it right? We’ll run you through the basics in just a few simple steps.

  • Decide your budget and pick your game
    Before you start playing, you’ll need to know how much you can afford to bet. Your budget will impact the slots you can choose from, based on the minimum and maximum bet for that title.
  • Set your coin size
    You place your bets with coins, which translate into your chosen currency, meaning the same slot games can be played around the world, without the need for currency conversion. Many online slot machines allow players to set the coins to an amount that suits them, giving you more flexibility. While a higher coin value could translate to a higher pay out, you should always bet within your means and never wager more than you could afford to lose.
  • Pick your paylines
    The lines you bet on are called paylines, and the symbols will appear along these lines. You can set the wager amount for each line, but remember that the more lines you bet on, the more you’ll spend on each spin. Your total wager will be debited from your online casino account.
  • Hit spin
    Spinning is the easiest part of playing slots. All you need to do is click the ‘spin’ button to set the reels into motion. There’s no tactical time to spin, the random number generators (RNG) will have already predetermined the outcome.
  • Check for wins
    So, the reels have stopped spinning, did you get lucky? Don’t worry about missing a win, graphics and sound effects usually make it clear that you’ve matched winning symbols. If you did get lucky, will be credited to your online casino account immediately, giving you the chance to use them on other games, or request a withdrawal.

Slots software developers

Pretty much every casino software provider has dipped its toes in the realm of slots, but that’s not to say they’ve all focused on the same features. Want to find out which software house makes the best slot games for you? The Casino Genius team has picked out the top slots software developers, highlighting the strong points of each.

 Play’n Go

As one of the first developers to create slots for mobile, Play’n Go makes it possible to enjoy top-notch slots wherever you are. Its use of Flash and HTML5 in production means games are of the same high-quality no matter which device you play on. Titles like Sizzling Spins, Ring the Bells and Pearls of India are just a taste of what you can expect from this software giant.

Yggdrasil

Yggdrasil has created some of the most visually-appealing slots titles out there- with Vikings Go To Hell and Incinerator some of the games in its catalogue. Yggdrasil’s iSense technology, its HTML framework, to make for seamless slots gameplay. As a relatively new slots software provider, Yggdrasil doesn’t yet have the biggest portfolio, but its efforts so far have certainly been appreciated. This software house has already won a handful of prizes at the EGR B2B Awards in recent years.

NetEnt

This casino software giant has developed some of the most popular slots on the market. Having signed exclusive deals with big names like Sony Pictures and Universal, NetEnt have created some of the biggest branded online slots, from Jumanji slots to Guns ‘N Roses and Vikings themed reels, the choice is pretty impressive.

The good news is that the UK’s best slots site feature a range of games from different software houses, so you can pick and choose your favourite titles.

Bonuses for slots

Bonuses can help your bankroll last a little longer, and you can get your hands on one at most UK slot sites. Each site will have its own bonus package, and will usually reward new players for joining the site with a welcome bonus. Free spins are the most popular welcome bonus for slots, and you’ll often find these added on top of other deals, like matched deposits and free cash. While you’ll usually need to make a qualifying deposit to claim a casino bonus, you might be lucky enough to get your hands on a no deposit free spins offer. These allow you to play real money slots without wagering your own cash.

While free spins on slots give you the chance to set the reels spinning without eating into your deposit, withdrawing your bonus winnings isn’t always as straightforward. While you’ll find the odd no wagering slots bonus, most come with pretty high wagering requirements- sometimes in excess of 60x. As if these playthrough requirements didn’t make withdrawing your winnings hard enough, you’ll usually have to complete them within a limited timeframe, which can range from as little as a couple of days to a few weeks.

Free online slots

You won’t always need to make a deposit to play slots. Most of the UK’s best slot sites offer free demo versions of games, so you can set the reels spinning without risking real money. Whether you just want to play slots for fun, or want to try out a new slots game, demo slots games are for you. Of course, you won’t win real money playing free slots, and you might not have access to all bonus features, but they’re still a pretty good way to get a feel for the game without putting your own money on the line.

Mobile slots

Gone are the days of under-optimised mobile slot games, software houses are now creating slots with mobile users in mind. Whether you want to download a mobile app or play slots in the mobile web browser, you can spin the reels in just a couple of clicks. You don’t have to compromise on the quality or graphics, or the range of games, as most slots sites offer the same games across both mobile and desktop platforms.

To get the most out of mobile slots, we’d recommend playing when you have a stable internet connection. You can play using mobile data, but there’s a slightly higher chance you’ll lose connection.

Slots site checklist

We’ve picked out the top UK slot sites on the market, but there are always a few things to keep in mind before you sign up to play. Use the casino genius checklist to ensure you’re only playing at the best.

Licensing

The first thing you should check is that the slots site is licensed. Casino Genius has a no-nonsense approach to licensing, and you should too. At the very least, playing at licensed sites guarantees you a selection of safe and fair slots. It’s easy to spot a UK licensed casino, as it’ll feature the UK Gambling Commission (UKGC) logo, as well as its licence number, on the site.

Payment methods

You’ll need to deposit some funds into your online casino account to play slots for real money, but what payment options do you have? Debit card deposits are pretty standard across online casinos and PayPal is a common e-wallet option at the better-known slot sites, but you might need to look a little further for casinos that accept Bitcoin deposits.

Friendly withdrawal terms

Why play real money slots if you can’t get hold of your winnings? It’s a good idea to check the terms and conditions for withdrawal requirements before you sign up, keeping an eye out for processing times and minimum withdrawal amounts. While the £10 minimum withdrawal at most sites won’t be a problem for high-rollers, it might be a meaner feat if you’re playing low-stakes slot games.

Customer support

While you might not need to contact customer support, it’s always best to have options. When can you contact the staff, and how can you contact them? The best online slots casinos offer 24 hour customer support, which you can access via UK telephone numbers, email and live chat.

Good to go?

Now that we’ve shared our expert slots knowledge, you’re probably ready to start spinning the reels for yourself. Our genius team has picked out the UK’s best slot sites to get you started. Take a look at our reviews to find out which site is best for


Frequently Asked Questions

Still got a question? Someone might have asked it before!

What are the odds of winning on slots?

This varies, depending on the slot you’re playing on, as each will have a different number of paylines and winning symbol combinations. Let’s take a look at a classic 3-reel slot machine as an example. If each reel has 20 unique symbols, you stand a 1 in 8000 chance of getting a winning combination (1/20x1/20x1/20). The most simple slot machines have the best odds, but

Can I still claim a bonus when playing on mobile?

Definitely. In fact, some online casinos have bonuses that are exclusive to mobile players. Just like any regular bonus, you’ll rarely find a mobile casino bonus without wagering requirements. Be sure to check the terms and conditions before you claim yours to avoid any nasty surprises later on.

What does RTP mean?

RTP stands for return to player and indicates what percentage of your wager you could expect to win back on a game. This calculation is theoretical, based on an infinite number of spins, which means players could have won more or less than this at any given time. So, while in theory you could earn back £98 for every £100 wagered on a 98% RTP slot game, this isn’t representative of every player’s experience. Not only are licensed UK casinos are required to display the RTP clearly on every slot game, they must also monitor the RTP to ensure it’s accurate.

What happens if I lose internet connection when playing online slots?

In most cases, the reels will continue to spin and you’ll simply see the results when you resume connection. If you got lucky, your winnings will be credited to your online casino account wallet to use for future spins.

How can I guarantee a win on slot games?

You can’t. Slots is a game of chance, so there’s no strategy to help you win. Licensed casinos use random number generators (RNG) to determine the symbols that appear on the slot machine, and these outcomes are out of your control. Betting on more paylines gives you more opportunities to land winning combinations, but you should never bet more than you can afford to lose.