Play Slots at the Top 20 Online Casinos
There are hundreds of online casinos for players in the UK to choose from, which means it can be difficult to figure out which casino sites are the best. To help, we're giving you our top 20 slots casinos, handpicked by our team of experts with decades of experience in all things online gambling.
New customers only. Deposit and wager £20 on Midnite Casino to get 100 Free Spins at 10p per spin, valid for 7 days on selected games. T&Cs apply. 18+ BeGambleAware.org
18+ New Players Only. Welcome Package – Min deposit £20. UK Players only. Max Bonus 1st Deposit 100% up to £50 and 2nd deposit 50% up to £100. Wagering requirement: 35x within 21 days. 20 Spins on 1st deposit and 30 spins on 2nd deposit. Spins credited on: Big Bass Bonanza. Spins expire after 24 hours. Begambleaware.org. T&Cs apply.
#AD | Welcome bonus for new players only | 110 free spins on Banquet of Dead after 1st deposit | Maximum bonus is 100% up to £100 | Min. deposit is £10 | No max cash out | Wagering is 40x bonus | Maximum bet with an active bonus is £5 | Eligibility is restricted for suspected abuse | Skrill & Neteller deposits excluded for welcome bonus | Cashback when offered, applies to deposits where no bonus is included | Cashback is cash with no restrictions | T&C's apply | 18+ | BeGambleAware.org | Gambling is addictive, please gamble responsibly!
#AD. Gamble Responsibly. Gambleaware.org. New Players Only. +18. Terms and Conditions Apply. Min. Deposit £10. Offer valid for 24hrs. Wagering requirement: 40x.
18+. Gamble Responsibly. Gambleaware.org The Welcome Offers cannot be used in conjunction with any other bonuses. These Key Terms and Conditions form part of and are an extension of the General Terms and Conditions. If and where there is a conflict between these Terms & Conditions and the General Terms and Conditions which relate specifically to the Welcome Bonus and Welcome Spins, these Key Terms and Conditions will prevail. Mega Riches reserves the right to withdraw or amend this promotion at any time. Minimum deposit £ 10. Opt-in required.
18+. New players only. 100% First deposit bonus up to £50: Min deposit £10. Wagering: 35x deposit amount to unlock as bonus cash. Bonus balance not playable until wagering is met. 20 Free Spins on Big Bass Splash (no wagering). Free spin winnings credited to cash. Expiry: Bonus balance 90 days; Free Spins 2 days. Game Contributions: Wagering on table games, live casino, Slingo, video poker & instant games contributes 10%. Neteller & Skrill deposits not eligible. T&Cs apply. GambleAware.org.
18+. New Players Only. BeGambleAware.org Minimum Deposit £20, 40x Wagering in 7 days, Qualifying Deposit played first, Max Bet £5, Max Win applies., Certain games excluded, Spin value £0.1 each. Full T&Cs apply. Take time to think.
This one-time offer is only available here for new UK customers of Jackpot.com. To participate a minimum £15 bet is required. Any terms not specified in these Special Promotional Term, the Promotional Terms shall apply and will be subject to Jackpot.com Terms and Conditions. No wagering requirements. Max cashout £/€100. Gambling can be addictive, please play responsibly. BeGambleAware.org
18+, sign up, deposit directly via the promotion page and stake £10 on Lottoland Big Bass Bonanza, and receive 50 Free spins on Lottoland Big Bass Bonanza. 30 day bonus expiry. Ends 14/02/26 at 23:59 GMT. Full T&Cs Apply. begambleaware.org. New player offer – T&Cs apply. 18+, Begambleaware.org
£10 min deposit. £100 max match. 50x wagering. Game eligibility & contributions vary. 10p to £5 bet range. £500 max redemption. New players only. Valid 7 days. 18+. BeGambleAware.org. Further T&C's apply.
#AD Welcome bonus for new players only | Maximum bonus is 100% up to £100 | Min. deposit is £20 | No max cash out | Wagering is 35x bonus | Maximum bet with an active bonus is £5 | Eligibility is restricted for suspected abuse | Cashback is cash with no restrictions | Skrill & Neteller deposits excluded | Cashback applies to deposits where no bonus is included | T&C's apply | BeGambleAware.org
18+. Only available to new players. Minimum £10 first deposit required. 20 Bonus Spins on Big Bass Splash. No Wagering Requirements. Winnings credited directly to cash balance. Neteller and Skrill deposits excluded. Expiry: bonus spins expire 2 days after deposit. Further terms apply.
New Players only. min £20 deposit. 40 Spins on Book of Dead per day after each qualifying wager in the first 5 days. max withdrawable winning £250. Ewallets excluded. Full T&Cs apply. BeGambleAware.org
Sign Up using the Promo Code nrg80 and make a minimum deposit of £25. Then wager a minimum of £25 on any casino slots and receive 80 Free Spins on Big Bass Bonanza. This promotion is for new customers only. Customers must be 18+. The free spins will be credited within 48 hours from qualification. BeGambleAware.org
18+. New Players Only. £10 minimum deposit. 100% up to a maximum of £200. The welcome offer can be activated only once. 30 calendar days to activate. 35x wagering. 60 calendar days from activation to complete wagering. The 100% bonus up to £200 will be paid out in 10% increments to your Main Account balance. Bonus balance is not payable. Any remaining bonus balance will be forfeited upon withdrawal. T&Cs Apply. BeGambleAware.org
New cust only. Opt in & deposit £10 in 7 days & wager 1x in 7 days on any casino game (excluding live casino & table games) for 100 Free Spins. Wagering contributions vary. Free Spins worth 10p each on Big Bass Splash. 3 day expiry. 18+. T&Cs apply. BeGambleAware.org
18+, new UK players only. Minimum deposit: £10. Wagering requirement: 35x. Max bet while wagering: £4. Bonus must be wagered within 21 days. Bonus spins must be used within 1 day. Full terms and Bonus terms apply. BeGambleAware.org
Terms: 18+ New Customers Only. Opt in, wager £10 on selected games, in 15 days. Get £15 in Bonuses (30x wagering) for Big Bass Splash + 20 Free Spins for selected games, after each £10 deposited and wagered within 15 days, up to max £45 in Bonuses + 60 Free Spins. 30 days expiry. Max redeemable £1,125. Selected payment methods only. Click for T&Cs. GambleAware.org | Please gamble responsibly. BeGambleAware.org
18+. New Players Only. £10 minimum deposit. 100% up to a maximum of £200. The welcome offer can be activated only once. 30 calendar days to activate. 35x wagering. 60 calendar days from activation to complete wagering. The 100% bonus up to £200 will be paid out in 10% increments to your Main Account balance. Bonus balance is not payable. Any remaining bonus balance will be forfeited upon withdrawal. T&Cs Apply BeGambleAware.org
New Customers Only. Stake £10+ across any QuinnCasino games, within 7 days of registration. Get 50 Free Spins (£0.10p spin value) on “Big Bass Splash”, valid for 7 days. Free Spins winnings are real cash, max. £100. UK 18+ T&Cs Apply. Gamble Responsibly. GambleAware.org
Finding a top 20 slots casino means finding one that excels in every area.
There are hundreds of casinos available to UK players, but only 20 can make it into this esteemed ranking.
These casinos are the best of the best; offering the fastest withdrawal times, the lowest deposits, the best selection of slot and casino games, and the best new player welcome bonuses.
We put every casino through its paces with our extensive review process, and the criteria we use to determine if a casino is good enough to be recommended by us is the same criteria we use to determine the best 20 casinos, where we look for those stand-out gambling sites.
As one of the UK's top casino comparison sites, you can trust the Hideous Slots seal of approval, and know that any of our recommended casinos will be fair, safe and secure.
We're proud of our review process; it's not just one of the most trusted in the UK, but also one of the most thorough.
Each of our recommended casinos come with their own written review, where you can examine the most important terms, the selection of slots, the bonus, and the payment methods and transaction times, amongst other details.
We include every aspect of a casino site that we feel is important in our reviews, so if you want to know anything else about one of our top 20 online casinos UK, you can find it on our website.
In the meantime, let's take a closer look at some of our top 20 casinos in the UK.
Mr Vegas continually makes our top casino lists, coming out ahead in everything from game selection to withdrawal times. Offering a lucrative 100% match bonus accompanied by 11 no deposit, no wagering free spins upon sign up, Mr Vegas has over 5,000 games and instant verification, so it's easy to see why it's so popular.
PartyCasino is another example of a casino that puts player experience above all else. Players at PartyCasino can benefit from instant withdrawal methods and an exclusive bonus when joining through Hideous Slots. Add in over 1,000 games, fee-free payments and 24/7 support, and you see the value of this site.
Players who love slots will find a comforting home at Mr Q, especially with their welcome bonus – 75 wager free spins, exclusive to Hideous Slots players. With over 1,000 slot games and a selection of table games, Mr Q covers all of the bases, and even offers swift payment methods and player support.
If you like Mr Vegas, you'll love Videoslots – the sister site of Mr Vegas. Offering the same lucrative bonus as its newer counterpart, Videoslots processes withdrawals every 5 minutes, meaning players can receive their withdrawal in 10 minutes or less; and this is all made even better with over 4,000 games and 24/7 support.
The Pools has one of the most impressive bonuses in this list; offering 100 no wagering free spins to players who only need to turn a £10 deposit over once. Additionally, this top rated casino offers over 1,000 slots and casino games, swift payments, and live chat customer support to help players across peak hours.
Safety is paramount when gambling online, and we take the safety of our players as seriously as they themselves do.
In our unique position, we're responsible for guiding players to the top 20 online casinos, but we must also guide them to the safest places to gamble online. This is why one of the most important things we consider when testing and reviewing UK casinos is the licence they hold.
We won't give any casino that isn't appropriately licensed and regulated our Hideous Slots seal of approval. For UK casinos, this means a United Kingdom Gambling Commission (UKGC) licence.
The UK Gambling Commission licence is one of the most respected worldwide, and a hallmark of trust; a sign that the casino you are joining is upheld to strict standards, which means you can be sure it is fair and safe to play at.
Our top 20 online casinos are all licensed and regulated by the UK Gambling Commission, meaning they are all independently checked and audited; both by us and regulatory bodies.
Here are our top 10 licensed and regulated casinos:
As online casinos in the UK continue to grow in popularity, many players find themselves wondering how the experience online differs to the experience in a brick and mortar casino.
Depending on your favourite kind of casino games, budget for playing and how much value you place in the social aspect of gambling, you can find different pros and cons both for the top 20 online casinos and a land based casino.
We believe that each of our top 20 online casinos can compete with the atmosphere and authenticity of even the best land based casinos. In fact, with the right casino games and live casino game shows on offer signing up to some of our recommended casinos can make you feel like you're at the hottest casino in Las Vegas.
Pros of a Top 20 Online Slots Casino
Pros of a Land Based Casino
Determining our top 20 online casinos is not a simple process.
We spend days examining each new casino we are contemplating recommending to our players, ensuring it meets our high standards.
This process is extensive, covering every aspect of a casino that we believe will impact the player experience, from safety and user experience to welcome bonuses and payout rates.
By using our casino recommendations and reviews, you know you're not just getting one of our personal top 20 online casinos – you're getting one of the top 20 online casinos across the entirety of the UK gambling market.
We prioritise the safety of our players above all else, which is why we will only review and recommend online casinos in the UK that are appropriately licensed and regulated; by the UK Gambling Commission, which guarantees fairness and safety at an online casino.
It's important for all players to be rewarded for their custom at one of our top 20 online casinos, whether they're a brand new player or a loyal regular. This is why we always look for casinos that offer new player bonuses and ongoing rewards such as cashback or reload bonuses.
The selection of games is crucial when determining which casino sites are in the top 20 available to UK players, so as part of our review process we consider both the quantity and quality of slots, casino games, live dealer games, and live casino game shows.
The best casinos facilitate an easy and enjoyable experience for players by offering easy to access customer support and making their site easily navigable, with compatibility across multiple devices, so we look at this user experience when determining which sites make our top 20.
Having an adequate selection of payment methods with fast withdrawal times is imperative when gambling online, so you know the top 20 casinos will offer access to these benefits, making this one of the most important aspects we consider during our review process.
We want players to be able to build some sort of gratitude at the online casinos they use for gambling, which is why loyalty and VIP rewards are an important step in our review process; allowing us to see which casinos offer special rewards to their most loyal players.
Thanks to our YouTube channel with over 25,000 subscribers, we're in a unique position to listen to player feedback – something we consider when determining our top 20 online casinos; by thinking about what the players we speak to weekly consider the most important factors.
One of the most exciting parts of joining any new casino is getting a new player welcome bonus.
This becomes so much more exciting when you join one of the top 20 online casinos in the UK as a new player, where the bonuses are more lucrative, more rewarding, and continue to roll in long after sign up.
The bonuses you might find at a top online casino in the UK will be split into three categories: new player bonuses, existing player bonuses and loyalty rewards.
It's easy to understand these rewards; a new player bonus is reserved for a brand new player joining the casino, an existing player bonus is any random or scheduled bonus that is made available to all players, and loyalty rewards are bonuses or perks that players can build up by depositing and playing at the casino.
Most common new player bonuses:
Most common existing player bonuses:
Most common loyalty rewards:
Any of our top 20 recommended online casinos will offer a wide variety of payment methods.
We expect any casino that has a hope of making it into our top 20 to cater to a diverse range of player preferences, offering everything from the classic debit card to the new, and often more preferred, e-wallet payment methods.
It is also crucial in our eyes that any casino wanting to be seen as one of the top 20 in the UK offers at least one fast payout method; that is, one payment method that will allow players to receive their cash out in 24 hours or less.
For UK players, the top 3 most popular payment methods are the following:
If you're a beginner wanting to get started into online gambling but you're not sure how or where to begin, we recommend CasinoCasino. The reason for this is simple; with a 100% deposit match bonus and a great selection of games, CasinoCasino will give you the best value from your initial deposit to try things out.
If you think our top 20 online casinos are impressive, you can only imagine what it takes to get into the top 10.
In order to make this list, casinos have to be a cut above the rest in every single aspect – offering fast withdrawals, impressive rewards, and even extra features like a dedicated mobile app.
For players who want the best and believe that nothing else will do, you'll want to pick a top 10 casino; one with no downsides whatsoever, that guarantees fairness, high payouts, and safe transactions.
Of course, we spend a lot of time curating our list of the top 20 online casinos UK, so don't think that a number 11 casino falls down in these important areas; top 10 casinos just have all of the bases covered, and usually rely on things like their reputation to propel them to this top spot.
Getting into the top 50 list of online slots casinos available to UK players is considerably easier than getting into the top 10, but that doesn't mean these UK casinos should be ignored.
These might be casinos that are newer to the market and don't yet have the reputation of some of their peers, or it might be casinos that offer superb bonuses with low wagering requirements but they don't yet offer withdrawals as swift as we'd like.
Remember: all of the casinos we review and recommend to UK players are licensed and regulated by the UK Gambling Commission. Because of this, they will all also be independently audited by a third party like eCOGRA.
This means that you're guaranteed the safety and security you deserve at an online casino, so even if you find yourself drawn to a casino that is ranked #21, you're not losing out on these important factors.
The top 100 online casinos available to UK players will offer a variety of features and perks to make the experience more enjoyable and rewarding.
Each of our top 100 casinos are licensed and regulated, and each offer an impressive welcome bonus.
The great thing about gambling online is that you can work your way through multiple casinos to claim the welcome bonuses that are on offer to new players, and if you want to do this and receive plenty of free money and free spins, we have hundreds of offers for you to choose from.
By choosing a top 100 online casino UK, you can get a superb and rewarding experience, allowing you to dip your toe into the world of online gambling and see what all the fuss is about.
The top 20 online casinos will provide players with thousands of games to choose from.
This selection should cover a variety of types of game, and be regularly updated; including older, more popular releases, and the latest and greatest slots and casino games.
More importantly, the top casino should also offer players the highest payouts; that is, the highest return to player values across their games.
With casinos now given the choice from many providers on which percentage they offer, we find that the top 20 casinos are those that are continually making this choice in favour of the player, and offering the highest percentages possible.
Video slots are the hallmark of any online casino; just as it's important to find the top 20 casinos, it's important to find the top 20 slots to play. With many themes and storylines, online slots have become more immersive than ever, and offer wins in excess of 100,000 times bet.
If you like video slots and want to add the chance to win life changing sums of money, progressive jackpot slots are the games for you. These releases have a growing prize pool that can reach millions of pounds; that you can win from a single spin on stakes as low as 10p.
Casino table games come in many varieties, including roulette, blackjack, baccarat and poker. These are virtual versions of the classic table games you would see in a land based casino, adapted so you can play them from the comfort of home or on the go, depending on your preference.
If classic table games playable from home sounds appealing, live dealer games are a step up. Players can enjoy the same classic games, like roulette, blackjack, baccarat and poker, but with a live dealer where real time conversation is possible, recreating the authentic experience.
Bringing the glitz and glamour of television to top 20 casinos are live casino game shows, which are some of the most exciting additions to online gambling. These games are played in real time alongside other players, with some replicating your favourite games – like Monopoly.
Choosing the top online casinos for you to join doesn't need to be an arduous task – especially with us here to make it easier.
Thanks to the hard work of our team, you can choose an online casino from our already tried and tested selection and get straight down to the fun stuff; playing your favourite games.
We're not just casino reviewers, we're players too; which means we spend our own hard earned money on the top 20 online casinos that we recommend to you.
By following four simple steps, you can guarantee success in your endeavours, safe in the knowledge that any casino you choose from Hideous Slots will be secure, regulated and rewarding.
Check for a UKGC licence to ensure your experience will be fair, safe and secure, made certain by a reputable regulatory body.
Ensure the online casino you choose offers a superb selection of slots, table games, live casino games and live casino game shows.
The top casinos have a variety of payment methods on offer, alongside at least one fast or instant withdrawal method.
Read reviews from trusted casino review sites like ours, or from other players, to gauge what kind of experience you can expect.
Finding the top 20 online casinos or top 20 slots UK might seem like a difficult task, but with the right instruction and research, you can become a pro in no time at all and play casino games online with peace of mind.
Above all else, look for top casinos that are safe and secure, with a UK Gambling Commission licence. All of our recommended online casino sites have this licence, which is why we're one of the top casino comparison sites in the UK.
With our decades of experience, we're able to guide you to not just one, but a multitude of standout slots casinos and slot operators, ensuring you get the most bang for your buck and have no regrets that you signed up.
Always remember if you do sign up to one of our top 20 online casinos UK to please play responsibly.
We recommend a number of great slot websites, but our favourite is Mr Vegas, which offers a lucrative welcome bonus alongside over 6,000 of the latest and most popular online slots.
Yes, online slots are regulated and audited to ensure they're fair and payout as they should, which means every player has an equal chance of winning – and do win.
Since slots are random, you can't make a living playing them, but plenty of people do work within the casino and slots industry – like Hideous Slots. We review the latest online slots for players and recommend casinos on our website, which is our job.
Any casino that has a UK Gambling Commission licence is trusted and fair, and every casino we recommend has this licence – like CasinoCasino.
To find the easiest slot to win on you want to find slots that have the highest payout rate, which means they have a high RTP, like Book of 99 from Relax Gaming.
The UK Gambling Commission licence and auditing from independent third parties like eCOGRA ensures slots are fair and therefore not rigged.
There's no advantage to playing slots – no streaks, no strategies and no guarantee of winning. You might as well enjoy as many games as you can, whilst trying to choose those with the highest RTP, rather than staying on one slot machine – although neither approach will work against you in the short term.
No, slot machines are controlled by the studios that make them and independently checked and verified, which means casinos cannot control them.
The best slot machine site will be the one that offers the largest selection of slots to players, like Videoslots, which has over 4,700 slots.
Yes, online slots are legal in the UK at any reputable licensed casino, like Neptuneplay.
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