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Best Online Slot Sites 2019

Ready to set the reels spinning? We’ve handpicked the best online casinos to play slots online. From the hottest new video slots to old cult classics, these top slot sites have games for everyone. All you need to do is compare, sign up and start playing!

Updated December 2019 Updated December 2019 Updated December 2019
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100% Up To £100 +10% Cashback
T&Cs Apply
New Customer Offer

New players only. Max withdrawal free spins winnings of £100. No max withdrawal for deposit offers. Max bet £5 while playing with bonus funds. Wagering for all bonuses is 35x. Welcome bonus not granted upon Skrill and Neteller deposits.

18+. Full T&Cs apply. Please gamble responsibly.

pay £100, play with £200

Claim Bonus
Claim Bonus
Our score: 9.9
New Customer Offer New players only. Max withdrawal free spins winnings of £100. No max withdrawal for deposit offers. Max bet £5 while playing with bonus funds. Wagering for all bonuses is 35x. Welcome bonus not granted upon Skrill and Neteller deposits. 18+. Full T&Cs apply. Please gamble responsibly.
Get 50 Free Spins, No Wagering
T&Cs Apply
New Customer Offer

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.

18+. Full T&Cs apply. Please gamble responsibly.

For every £1 deposited, 1 Free Spin will be credited.

Claim Bonus
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Our score: 9.7
New Customer Offer 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. 18+. Full T&Cs apply. Please gamble responsibly.

This is a bright and colourful casino that strives to make your online gambling experience both fun and rewarding. Here you’ll find hundreds of popular games spanning every category, as well as plenty of regular bonuses, including daily offers and a rewarding loyalty scheme. Best of all, there are no wagering requirements to play through!

100% Up To £300 +90 Spins
T&Cs Apply
MATCH + FREE SPINS

New players only. Minimum deposit of £20. Bonus spins are valid on selected games only, and subject to 35x wagering, and must be used within 10 days, otherwise any unused bonus spins shall be removed. Bonus funds are 100% up to £300 and separate to Cash funds. 35x (bonus + deposit) wagering requirements. £5 max bet with bonus. Bonus must be used within 30 days otherwise any unused bonus shall be removed.

18+. Full T&Cs apply. Please gamble responsibly.

pay £100, play with £200

Claim Bonus
Claim Bonus
Our score: 9.6
MATCH + FREE SPINS New players only. Minimum deposit of £20. Bonus spins are valid on selected games only, and subject to 35x wagering, and must be used within 10 days, otherwise any unused bonus spins shall be removed. Bonus funds are 100% up to £300 and separate to Cash funds. 35x (bonus + deposit) wagering requirements. £5 max bet with bonus. Bonus must be used within 30 days otherwise any unused bonus shall be removed. 18+. Full T&Cs apply. Please gamble responsibly.
Up To £1,000 +
100 Spins
T&Cs Apply
MATCH + FREE SPINS

Bonus on first 3 deposits of min £20 each; spins on selected slots. 25x wagering and T&Cs apply

18+. Full T&Cs apply. Please gamble responsibly.

Example: pay £100, play with £200

Claim Bonus
Claim Bonus
Our score: 9.6
MATCH + FREE SPINS Bonus on first 3 deposits of min £20 each; spins on selected slots. 25x wagering and T&Cs apply 18+. Full T&Cs apply. Please gamble responsibly.

Aspers online casino lives up to the reputation of its bricks-and-mortar counterparts, with over 400 games in its library and plenty of promotions to keep you coming back for more. There are daily, weekly and monthly offers, along with perks for the most loyal players and an ever-growing progressive jackpot to sink your teeth into!

100% Up To £250
T&Cs Apply
New Customer Offer

100% welcome bonus worth up to £250 is only valid for new players who have registered but have not made any deposit. The value of the bonus has a play through of 35 which must be met to validate any winnings deriving from it. The offer is valid for all payment methods available in Novibet, apart from Neteller and Skrill.

18+. Full T&Cs apply. Please gamble responsibly.

pay £100, play with £200

Claim Bonus
Claim Bonus
Our score: 9.5
New Customer Offer 100% welcome bonus worth up to £250 is only valid for new players who have registered but have not made any deposit. The value of the bonus has a play through of 35 which must be met to validate any winnings deriving from it. The offer is valid for all payment methods available in Novibet, apart from Neteller and Skrill. 18+. Full T&Cs apply. Please gamble responsibly.
200% up to £5,00
T&Cs Apply
New Customer Offer

Casimba offers 3 deposit bonuses for new customers ranging from 50% to 200% (adding to a grand total of £6,500). You'll also get 50 Free Spins.

18+. Full T&Cs apply. Please gamble responsibly.

pay £100, play with £300

Claim Bonus
Claim Bonus
Our score: 9.4
New Customer Offer Casimba offers 3 deposit bonuses for new customers ranging from 50% to 200% (adding to a grand total of £6,500). You'll also get 50 Free Spins. 18+. Full T&Cs apply. Please gamble responsibly.
Up To £400 Welcome Bonus + 100 Spins
T&Cs Apply
New Customer Offer

Select Casino offer on sign-up and deposit. 4 deposits of £10, £20, £50, £100 matched with a bonus cash offer of same value (14 day expiry). 35x real money cash wagering (within 30 days) on eligible games before bonus cash is credited. Spins credited upon deposits; under £50 =10 Spins, £50 or over =25 Spins; on Book of Dead only (3 day expiry, winnings paid in cash). Play Responsibly.

18+. Full T&Cs apply. Please gamble responsibly.

pay £100 play with £200

Claim Bonus
Claim Bonus
Our score: 9.3
New Customer Offer Select Casino offer on sign-up and deposit. 4 deposits of £10, £20, £50, £100 matched with a bonus cash offer of same value (14 day expiry). 35x real money cash wagering (within 30 days) on eligible games before bonus cash is credited. Spins credited upon deposits; under £50 =10 Spins, £50 or over =25 Spins; on Book of Dead only (3 day expiry, winnings paid in cash). Play Responsibly. 18+. Full T&Cs apply. Please gamble responsibly.
Enjoy Up To £998 +111 Spins
T&Cs Apply
WELCOME BONUS

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.

18+. Full T&Cs apply. Please gamble responsibly.

pay £200, play with £300

Claim Bonus
Claim Bonus
Our score: 9.2
WELCOME BONUS 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. 18+. Full T&Cs apply. Please gamble responsibly.
Deposit £10 Play With £60 + 20 Free Spins
T&Cs Apply
New Customer Offer

New customers from UK&IRL only. Min deposit £10. Deposits made with e-wallets are not valid for this promo. Bonus wagering x35 on eligible games. Winnings from bonus capped at £500. No Wagering requirements on winnings. SMS verification required. Opt in required.

18+. Full T&Cs apply. Please gamble responsibly.

Example: Pay £10, play with £60

Claim Bonus
Claim Bonus
Our score: 9.2
New Customer Offer New customers from UK&IRL only. Min deposit £10. Deposits made with e-wallets are not valid for this promo. Bonus wagering x35 on eligible games. Winnings from bonus capped at £500. No Wagering requirements on winnings. SMS verification required. Opt in required. 18+. Full T&Cs apply. Please gamble responsibly.

Betfair is a big name brand, and its games library lives up to this. With more than 450 games to offer, including an impressive collection of progressive jackpots, you won’t be stuck for choice at Betfair Casino. There’s plenty to get excited about here, with guaranteed daily and weekly jackpots, as well as daily free spins deals!

10% Cashback + £500 Welcome Package
T&Cs Apply
MATCH + CASHBACK

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

18+. Full T&Cs apply. Please gamble responsibly.

pay £100, play with £200

Claim Bonus
Claim Bonus
Our score: 9.1
MATCH + CASHBACK 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 18+. Full T&Cs apply. Please gamble responsibly.

Playing slots online

Pretty much every online casino site boasts a range of top slot games for players to enjoy. This means slots fans are spoilt for choice when it comes to picking the best site. You’ll need to be clued in on exactly what a site has to offer before you sign up to start playing. Luckily for you, Compare.bet has everything you need to know about playing slots online, from the very basics of how slots work, to claiming a bonus at online slot sites.

You can start playing online slots in just a few simple steps:

  1. Compare slot sites

    You won’t be hard pressed to find an online casino with slots, but it’s not as simple as signing up to the first site. From sign up bonuses to banking options and the titles on offer, there are a few factors to consider. We’ve made this easy, sifting through the slot sites on the market to bring you a list of only the very best.
  2. Sign up & verify your account

    Settled on a slot site? Time to sign up. The link on our list will take you straight to the registration page where you can create your account. You’ll need to wait for the casino to verify your identity before you can play.
  3. Deposit

    You’ll need to make a deposit to play real money games. Head to the cashier, select your deposit option and deposit amount and confirm. The very best slot sites offer instant deposits, so you can start playing in next to no time.
  4. Play

    Now for the fun part! With the money in your casino wallet, you’re ready to play. Choose a game that suits your budget, make your bet and hit spin. Fingers crossed!

How Slots Work

How do online slots work?

Unlike other casino games, such as blackjack and poker, playing slots online involves little skill. Luck alone determines whether or not you’ll hit a winning symbol combination when the reels stop spinning. Whichever symbols appear on the reals are determined by a random number generator (RNG), ensuring that the outcome of every spin is random and, as a result, fair. Under the Licensing Conditions and Codes of Practices set by the UK Gambling Commission (UKGC), every UK-licensed casino must use this technology on all games.

This RNG technology determines which symbol will show on each reel at the end of the spin. The outcome of every spin is separate from the previous and next spin, which means you’re never ‘due’ a win. Likewise, if a slot has just paid out the jackpot prize, there’s no saying it won’t pay out again on the next spin.

Certain online slots have an ‘autospin’ feature, which allows you to set your wager for a specified number of spins until you’ve spent the assigned credit.

How to Play

How to play online slots

Slots are about as simple as it gets when it comes to online casino games- just set your bet, hit the spin button and wait to see if you get lucky. Even if you’re playing one of the latest video slots with multiple paylines and bonus features, the basic premise is the same. Sure, you might need to set your coin size and select the number of paylines you want to bet on, but that’s pretty straight forward too.

The more paylines you bet on, the more ground you cover. Just remember that your bet will multiply by the number of paylines you bet on, increasing your overall wager for that spin.

If you do land a combination of winning symbols, you’ll know about it. Music will play and images will appear on the screen to let you know that you’ve struck lucky. You’ll then have the option to use your winnings to play again or to keep them in your casino wallet.

  1. Set your bet and select your paylines
  2. Hit spin
  3. See if you land

Slot Games

Which slots can I play online

Online slots might be simple, but there’s still plenty of variety when it comes to the games on offer. Whether you’re a fan of traditional fruit-machine style slot games, or prefer all-singing, all-dancing progressive jackpot slot games, the best online slot sites have something for everyone.

Classic Slots

These slots hearken back to the days of fruit machines, though the symbols aren’t necessarily fruit, bells and lucky 7s. Most classic slot games have three or five reels, making it pretty easy to select your paylines, which are almost always in one direction. This simplicity makes them a popular choice among slots newbies.

Video Slots

Video slots tend to have more going on that classic slot games. Expect crazy themes, tailor-made soundtracks and graphics that could give some video games a run for their money. These games offer players multiple ways to win, with some titles offering over 1,000 paylines in every direction you could imagine. Video slots also tend to have more bonus rounds and in-game free spins than classic slots. Video slots are perfect for players looking to combine their love of online casino with their favourite films, tv shows and music genres, with software developers such as NetEnt and Playtech partnering with big production companies to create branded video slots.

Penny Slots

You don’t need to be a high roller to play online slot games, thanks to penny slots. You can bet as little as 1p per spin on these titles, which is great if you want to play real money slot games but have a limited budget. But that’s not to say that penny slots are a budget option, you’ll still get high-quality graphics, top-notch soundtracks and the chance to win big.

Progressive jackpot slots

This is where real slots enthusiasts get excited. Whereas most slot games have a fixed prize for winners, the prizes for progressive jackpot slot games just keep growing! However, even progressive games come in different shapes and sizes. Whereas some jackpots are specific to the online casino at which you’re playing, others are pooled between different casinos sites. Whatever the nature of the progressive jackpot, the size of the prize pool increases as players wager. These jackpots have been known to hit the hundreds of thousands, with titles such as Mega Moolah and Mega Fortune making players millionaires!

You may need to bet the maximum coin size to be in with a chance of hitting the top jackpot prize.

Mobile Slots

Keep your favourite slots in your pocket

With so many players choosing their mobile for online gambling, slots developers create games with mobile players at the top of the priority list. This means there’s plenty of choice when it comes to mobile slot games. It goes without saying that virtually every online slots game is available on mobile, but some of the best new slot games have been created especially for play on a smaller touch screen. Not only does this mean you can benefit from improved usability, but the graphics are also designed for mobile, which makes for an improved aesthetic, too.

Every slot site on our list has a mobile-friendly website, but the best have developed mobile casino apps for Android and iOS, which makes playing mobile slot games a breeze. You can get from your home screen to your favourite title in just a couple of clicks. Pay by mobile slot sites make it even easier, as you’ll have everything you need at your fingertips.

We’ve picked out the top slot sites for playing on your mobile.

Slots Bonuses

Claim your bonus for online slots

The best online slot sites reward players for choosing their site. A welcome bonus is the most common offer, but there are also other slots bonuses up for grabs through other promotions, such as happy hours and VIP rewards. You can get your hands on these bonuses at the top slot sites:

Free spins

Free spins are the ultimate bonus for online slots. This bonus is as simple as it sounds: you can play real money slots using these tokens- no need to dip into your own wallet. Some online casinos offer a set number of spins when you make a qualifying deposit, whereas others offer free spins in relation to how much you deposit.

No deposit free spins

You don’t even need to make a deposit to claim a free spins no deposit bonus. Simply sign up, verify your account and opt-in. Once the free spins are credited to your account, you’ll be in with a chance of winning real money on slots, without spending a penny of your own.

Matched deposit

Matched deposit bonuses are one of the most common casino offers. You’ll receive a percentage of your first deposit as free casino credit. Percentage matched will vary between online casinos, ranging from 25% to as much as 200%, though there’s almost always a limit to how much credit you can actually claim. These bonuses are ideal if you’re interested in other casino games, besides slots. Of course, you can play slots with this credit, but you can also use it on the likes of online roulette and blackjack games.

Some online casinos spread the matched deposit bonus across your first two or three payments rather than in one lump-sum.

No deposit casino credit

These bonuses work in a similar way to matched deposit deals, but you won’t need to dip your hand into your own pocket first. Much like no deposit free spins, you have a chance to win real cash even though you’re playing for free. No deposit bonuses are usually more modest than matched deposit deals— usually £5 free no deposit at most— but you can play a whole host of casino games, including online slots, with your rewards.

How to claim your bonus

Exactly how you claim the bonus will vary between slot sites. While some simply ask players to opt-in during the signup process, others need a bonus promo code. Be sure to check the bonus terms and conditions before you sign up to make sure you don’t miss out on a deal.

Bonus terms and conditions

There will be terms and conditions attached to whichever online slots bonus you choose and you’ll need to factor these in when comparing bonuses. Wagering conditions apply to pretty much every offer, and you can’t withdraw any bonus winnings until you complete these.

On top of wagering requirements, there are also other terms to consider. Some slots bonuses may only be used for selected titles, such as the newest games. Sites may also restrict how much you can win with your bonus, how long you have to complete any wagering requirements and how much you can withdraw at once.

Slots

Online slots are the most popular online casino games in the UK, attracting more players than roulette, blackjack or any other game type.

Free Slot Games

Play slots online without spending a penny

You don’t need to spend a penny to play online slots. Pretty much every slot game, with the exception of progressive jackpot titles, are available in free play mode. Free online slot games are ideal if you simply want to play slots for fun or try out a new slot game before you put real money on the line.

It was announced that from the 7th May 2019, free-to-play casino games are subject to the Gambling Commission’s new age verification rules. This means even if you’re playing demo games, you’ll need to create an account and verify your age. This is designed to protect under 18s from accessing casino-style games, a move that we of course fully support.

Of course, you can’t win real money when you play free slots, but you do get to sample all the same bonus features as real money games. Whether your title features expanding reels, walking wild symbols and scatter symbols, you get to see what all the fuss is about without dipping into your own wallet.

New Slots

A fresh, new look on this casino classic

The great thing about online slot games is that there are always new titles popping up. There’s plenty to keep online slots players entertained as multiple brand new slot games are released each month. With each new release, online slots developers wow players, be that with bigger brand partnerships, higher definition graphics or bigger progressive jackpots.

Head over to our New Slots page to find out more about the latest slot games and casinos to play at.

Microgaming announced the launch of Book of Oz Lock 'N Spin - the second chapter in the Book of Oz series - in September 2019

High RTP Slots

Maximise your chances of winning with high payout slots

It’s important to understand the return to player (RTP) percentage of a slot game before you start playing, as this gives you an idea of how much you could theoretically win. These percentages are calculated over an infinite number of spins, which means you could win more or less than this percentage of wagers during your period of play.

When it comes to RTP, the closer to 100% the better. Most online slot games have an RTP of around 90% and those over 96% RTP are generally considered high payout slots. However, some of the highest paying slots offer even higher payout percentages.

Slot Game Return to Player (RTP)
Mega Joker
99%
Jackpot 6000
98.86%
Blood Suckers
98%
Starmania
97.87%
Jackhammer II
97.1%

Time to play!

Now that we’ve taken you through the ins and outs of online slots, you’re ready to head to the casino and spin the reels! Not sure where to play? You’re sure to find your best bet from our carefully curated list of top online casinos. It’s jam-packed with casinos that offer the best slots, promotions and bonuses you’ll find online. Simply compare and sign up to claim your exclusive welcome bonus today!

Your Questions Answered

Do I need an account to play free online slot games?

Yes. If you’re playing at a UK slot site, you’ll need to create an account, and have the slot site verify your identity before you can start playing. These rules apply whether you’re playing free slots or real money games, though the exact account verification process will vary between sites.

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Last updated:
13th November 2019
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