Online Slot Casinos With Awesome Welcome Bonuses

Ken Slots is a leading compiler of online gambling lists for slot enthusiasts around the world. On this page, you will find the best online slot casinos for players looking for incredible bonus offers.

I believe in promoting regulated online casinos that share the same commitment to their customers that I do. That is why all of the advertised brands are legal, reliable and fair.

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terms and conditions apply

best online slot casinos uk

500 bonus spins

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New Player Welcome Offer
Stake £10 get 200 free spins
+ daily mystery free spins bonus!
New customers only. 18+. Promo code CASINO100. £10 min transfer and stake on Slots at Betfred Casino within 7 days of registration. Minimum 5 game rounds. Game restrictions apply. Max 100 Free Spins. 50 Free Spins on selected titles credited instantly after qualification. Second 50 Free Spins on selected games within 48 hours. £0.10 per spin. Free Spins must be accepted within 3 days. 7-day expiry. Not all titles may be available in iOS app. Payment restrictions apply. SMS verification and/or Proof of I.D and address may be required. Full T&Cs apply.
New Player Welcome Package
100 free spins + up to £200 bonus
Applies only to new depositing players 18+
Terms and Conditions Apply. New players only. 18+. The minimum deposit is £10. Welcome package splits over 3 deposits. 35x wagering requirements apply to match up bonus. Offer valid for 1 week. 100 spins split into 20 spins per day for 5 days. 50x wagering applies to bonus spins. Full T&Cs apply.
New Players Welcome Offer
50 free spins on first deposit
FIRST DEPOSIT ONLY. 50 FREE spins on book of the Dead. Min deposit £10. Each spin valued at £0.10. Excludes new players in N. Ireland. T&C's rewards and game policies apply.
New Players Welcome Offer
Claim up to £300 Bonus Cash
on your first 2 visits at Hyper casino
New players only, min deposit £10, wagering 45x, max bet £5 with bonus funds, 100% up to £100 bonus on 1st deposit. No max cash out on deposit offers. Welcome bonus excluded for players depositing with Skrill or Neteller. Full T&C’s apply
New Players Welcome Package
100% welcome bonus up to £50
+ 50 FREE spins on Book of Dead
**First Deposit Only** Min. deposit: £10, max. Bonus £50. Game: Rich Wilde and the Book of Dead, Spin Value: £0.10, Max Spins:50. WR of 30x Deposit + Bonus amount and 60x Spin winnings amount (only Slots count) within 30 days. Max bet is 10% (min £0.10) of the spin winnings and bonus amount or £5 (lowest amount applies). Spins must be used before deposited funds.
First Deposit/Welcome Bonus can only be claimed once every 72 hours across all Casinos. Bonus Policy applies.

New Players Welcome Offer
30 free spins on Bigger Bass Bonanza

T&C's: First deposit only. Min deposit & spend £10. Max 30 spins on Bigger Bass Bonanza at 12p per spin. Spins credited upon spend of £10. Full T&Cs apply.

New Players Welcome Package
Claim 100 free spins on Starburst
Join the BIG casino
New Depositors & UK Customers only 18+. Minimum deposit £10. 10x wagering on winnings. Spins valid only on Starburst slot game and valued at £0.10 each. Offers expire after 7 days. Excludes deposits made by Skrill, Entropay, Paypal and Neteller. T&C's apply.

New Players Welcome Offer
Win up to 500 free spins on Starburst
Plus other prizes such as Amazon Gift Vouchers!


New Players Welcome Package
Get 100 free spins on deposit
Play the official UK Masked Singer Slot Game

New Customers Only. Min. deposit: £10. Game: Masked Singer UK, Spin Value: £0.10. The Prize Twister awards a random prize of either cash or free spins. WR 60x free spin winnings amount (only Slots count) within 30 days. Max bet is 10% (min £0.10) of the free spin winnings amount or £5 (lowest amount applies). Spins must be used and/or Bonus must be claimed before using deposited funds. Bonus Policy applies.

New Players Welcome Package
100% Welcome Bonus up to £100
+ always 10% cashback!
New Customers Only. min deposit £20, wagering 35x, max bet £5 with bonus funds. Max bonus is 100% up to £100. No max cash out on deposit offers. Welcome bonus excluded for players depositing with Skrill or Neteller. Cashback is cash with no restriction. Full T&C’s apply.

New Players Welcome Package
Up to 50 free spins or £200 cashback
10% Cashback on losses up to £200

NEW CUSTOMERS ONLY. First Deposit only. Min Deposit £50. 10% Cashback on losses up to £200 for 24 hours from the first deposit.

New Players Welcome Package
100% Bonus up to £50
+ 25 FREE spins on Book of Dead
FIRST DEPOSIT ONLY. Min deposit: £10, max. bonus £50. Game: Book of Dead, Spin Value: £0.10. WR of 30x Deposit + Bonus amount and 60x Free Spin winnings amount (only Slots count) within 30 days. Max bet is 10% (min £0.10) of the Free Spin winnings and bonus amount or £5 (lowest amount applies). Free Spins must be used before deposited funds. First Deposit/Welcome Bonus can only be claimed once every 72 hours across all Casinos. T&C's apply.

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How to choose the best online slot casinos

It isn’t always easy to know whether the slot casinos you come across online are going to be a good match for you. There are a lot of variations out there, and depending on your individual requirements some may be more suitable than others. So how do you decide? How to choose from the best online slot casinos out there?

Ken Slots has more than 30 years of experience in the global gambling industry. I have used that experience to source the most trustworthy and reliable online casinos to help make your decisions easy. I have picked out casinos that I believe will be of interest to the majority of slot players. I have done so by identifying five essential criteria that should appeal to most of you.

First pick a fully licensed slot casino

Your online slot-playing life is going to be a whole lot easier if you start off in the right way. Choosing a casino with an online gambling license, issued by a recognised governing body, could potentially save you a lot of heartaches later on.

There are multiple licensing authorities each servicing different parts of the world. For example, the Gambling Commission is responsible for the UK, the Swedish Gambling Authority (Spelinspektion) is responsible for Sweden, and the Malta Gaming Authority is good for much of the rest of the world. Depending on where in the world you are located it makes sense to choose a slot casino licensed by the relevant authority. Failure to do so may result in your account being terminated or possibly you won’t be able to open an account at all.

Choose slot casinos with reputable payment processors

When it comes to depositing funds or withdrawing winnings at online slot casinos, most people want the process to be pain-free and fast. This is why using a recognised and trusted payment processor is essential. When it comes to choosing an online casino quick payout is what you want.

There are several ways online slot players can deposit money into their player accounts. Probably the most widely used and popular are Mastercard & Visa, but there are others. E-wallets such as Neteller, Skrill, MuchBetter and even Paypal are extremely popular with slot players as they are fast and reliable. Pre-paid cards are also a great way to make deposits. Players love using pre-paid cards from Paysafecard, Visa and Mastercard because they are able to limit the amount they can deposit. Another handy way to deposit cash into your casino account is to pay by phone. Companies such as Boku specialise in making online payments using your mobile phone bill, which is super convenient!

It is important to remember that depositing money into an online casino account using a credit card is illegal in the UK. Better options for making deposits and withdrawals include e-wallets, pre-paid cards or pay-by-phone.

Look for slot casinos online offering a generous deposit bonus

We all love a good deal. The best deals available to slot players are the welcome bonuses offered by online slot casinos. These range from free spins up to welcome bonus offers that match your initial deposit. These are incredibly popular with first-time depositors but you do need to think carefully about what type of bonus is right for you. The three most common bonus offers that you are likely to come across are…

  • Free spin bonuses
  • Deposit bonuses
  • Casino bonus codes

A lot of online slot casinos prefer to offer extra spins as a bonus. One such example of a welcome bonus using free spins get up to 500 bonus spins when you open an account at one of our featured casinos. If you are looking to play online slots with bonus spins then this one is definitely for you.

Another really popular slot bonus is the deposit bonus. This bonus type is a match bonus. What this means is that when you make a deposit at a new online casino they will match that amount to effectively double your cash deposit. A lot of new players are attracted to this bonus type, but it often comes with stringent wagering requirements which need to be taken into account.

One bonus type that is highly prized by both new and experienced online casino players is casino bonus codes. These can usually be found advertised as strings of numbers and/or letters on casino comparison websites such as this one. They are unique codes that can be used at a variety of slot casinos online to unlock special reload or free spin bonuses.

Search for the widest choice of online slots & casino games

When it comes to online slot gambling, players expect to see a wide choice of top online slots from recognised suppliers. The sheer volume of great slot titles available at the best online slot casinos is mind-blowing. Many of the world’s best gaming studios have a portfolio with dozens of slot games and they add more and more each month.

Game producers such as Big Time Gaming, Elk Studios, Avatar UX, Pragmatic Play and Yggdrasil will be familiar to anyone that loves to play slots online. These major studios together with other famous names like NetEnt, and smaller studios such as Booming Games and Snowborn, produce all the great slot titles that you love to play online. Because of this online slot casinos have a massive amount of slots that they can bring to their players. What this means is that when you sign up with a new slots casino login you should be able to play many of the world’s most popular slots.

Of course, not all slot casino sites are going to offer every game. As a general rule, you should be looking for online slot casinos that can offer a minimum of 500 slots. This amount of slot games is usually more than enough for most players. At the other end of the scale, there are casinos that offer more than 6000 slot titles. This number is probably more slots than the average player could ever hope to play in a lifetime. On the other hand, it does offer you a great deal of choice.

When comparing online casinos it is always a good idea to take a look at the latest trending slot titles. What are the new online slots, most popular slots and also the jackpot slots? Right now the online slots attracting the most attention include Pile ’em Up, Divine Riches Helios, Gates of Olympus and Money Cart.

Some of the most popular slot titles that you will come across include Starburst, Book of Dead, Cleopatra, Agent Jane Blonde, Immortal Romance, Big Bass Bonanza and Gonzo’s Quest

24/7 customer support may well be your best friend

All the top online slot casinos have a dedicated customer support structure designed to offer as much help as you could ever need. Whilst it is true that most slot players never need to turn to customer support, it is comforting to know that they are for when you do.

Try to look for slot casinos online with 24/7 support. Many of the best casinos offer this nowadays so there is not really any excuse for an online casino to provide less than adequate coverage. The basic customer support options that you really should take for granted include…

  • Live chat with an operator
  • A comprehensive FAQ section
  • An email address
  • Dedicated telephone support

Nice to have’s include WhatsApp or Telegram, although these forms of customer interaction are used by only a few casinos. Should your chosen casino not offer 24/7 support, then at the very least, it should provide 10 to 12-hour weekday support at times convenient to you.

Best online slot casinos UK – licensed & regulated

The UK is a highly-prized market for online casino operators. UK slot players are recognized not only for their affluence but for their knowledge too. This is why it is a source of pride for Ken Slots to be able to bring you the best legal slot casino sites in the UK. I personally select, rate, and review each one. Only once I’m happy, do I recommend UK online slot casinos to you. What’s more, each of our casinos is regulated and licensed by the UKGC. This means you can play the best online slots in complete confidence.

best online slot casinos UK
Claim 30 free spins on your first deposit with no wagering requirements
T&Cs Apply

T&C's: First deposit only. Min deposit & spend £10. Max 30 spins on Bigger Bass Bonanza at 12p per spin. Spins credited upon spend of £10. Full T&Cs apply.

100% up to £50 + 50 FREE spins

T&Cs Apply

New Players Only. 18+. Minimum Deposit £20. Wagering Requirement 35x. Offer valid for 72 hours.

100% up to £50
T&Cs Apply
New Players Only. 18+. Minimum Deposit £20. Wagering Requirement 35x. Offer valid for 72 hours.
Up to £500 Deposit Bonus
T&Cs Apply
New Depositors & UK Customers only 18+. Minimum deposit £10. Max total bonus £200. 100 spins require 3x deposits of £10 each. Spins are issued on specific games. 35x wagering. Spins expire after 24 hours. T&C's apply.
100% Welcome Bonus
T&Cs Apply
New players only. Opt-in required Wagering occurs from real balance first. 50x wagering any winnings generated from free spins, contribution may vary per game. The wagering requirement is calculated on bonus bets only. Free spin is valid for 7 days from issue. Max conversion: $/£/€ 20. Full Terms apply.
Claim £150 welcome bonus plus 150 free spins
T&Cs Apply
First 3 deposits only. Min dep £10. 2nd & 3rd dep £20. Max cumulative bonus £150 + 150 free spins. Bonus match amount varies per deposit. Spins awarded on one of four chosen games. 50x wagering on deposit + bonus. 10X max bonus conversion or £5000 whichever is lower. £5 max bonus stake.
100% bonus plus 50 free spins on Book of Dead
T&Cs Apply

Automatically credited upon deposit. Cancellation can be requested. First Deposit Only. Max. Bonus £50. Maximum amount of Free Spins is 50. Game: Book of Dead, Spin Value: £0.10. WR of 30x Deposit + Bonus amount and 60x Free Spin winnings amount (only Slots count) within 30 days. Max bet is 10% (min £0.10) of the free spin winnings and bonus amount or £5 (lowest amount applies). Spins must be used and/or Bonus must be claimed before using deposited funds. Deposit/Welcome Bonus can only be claimed once every 72 hours across all Casinos. 18+ only, Begambleaware.org, Full Terms Apply. Bonus Policy applies.

500 Bonus Spins
T&Cs Apply
18+. New players only. One Welcome Package per player. Min deposit £20 1st deposit get 100 bonus spins, 2nd Deposit: get 75 bonus spins, 3rd deposit: get 125 bonus spins, 4th deposit: get 50 bonus spins, 5th deposit: get 150 bonus spins. All spins are on Book of Dead slot game only. Spins winnings credited as bonus funds. Max winnings from bonus spins are equivalent to the number of spins awarded. Bonus funds + spin winnings are separate to cash funds and subject to 35x wagering requirement [bonus only). Only bonus funds count towards wagering contribution. £5 bonus max bet. Bonus funds must be used within 30 days, spins within 10 days. Affordability checks apply. Terms apply. BeGambleAware.org.

Playing online casino slots for real money

Most new online slot players have usually played at a land-based or retail casino before beginning to play slots online. It is there that they may have discovered a slot machine that they really enjoyed. When these same players register an online casino account they tend to want to play those same online slot machines for real money.

However, with such a massive amount of new slot games available to play that can’t be found at land-based casinos it is often far more rewarding to play online slots for real money at your favourite slot casino.

Reasons why you may want to play online slots for real money

There are many reasons why you may want to play online slots for real money. You may consider it an acceptable form of home entertainment or even just to kill some time in the Doctor’s waiting room. Whatever your personal reason here is the main reasons according to Ken.

  • Real money online slots are incredibly easy to play and understand. Unlike some other casino games such as 3 card poker, blackjack or even video poker there are no complex rules or strategies to learn.
  • Advances in gaming technology mean that the best online slots for today’s market have incredible graphics and sound that are designed to draw you in. They will also keep you engaged for hours.
  • The levels of innovation that go into modern online slots are incredible too. Unlike casino table games that have remained largely unchanged for more than 100 years, slot games are unrecognisable from those that were played even 10 years ago.
  • Let’s be honest here, one of the main reasons why you may want to play online slots for real money is the money! Online jackpot slots can reach anywhere up to $20 million or more.

Use of cryptocurrency at a UK online slots casino

The jury is out as to whether cryptocurrency is real money or not. One thing is for sure though, it is possible to use cryptocurrency or Bitcoin for real money gambling online. However, when it comes to a UK online slots casino cryptocurrencies such as Litecoin, Dogecoin, Ethereum and Bitcoin are not widely accepted.

Where to play online casino slots for free

If you want to play slots online free then there are several ways that you can do this. The easiest is to simply register an account at one of the slot casino sites in our online casino lists. The best online slot casinos allow players to play free casino slots with free coins. They do this because it gives slot players an opportunity to try out the latest online slot games without risking their own cash.

Another way to play slots for free is to take advantage of a casino welcome bonus get free spins and play through them to try and win cash money. Some of the best online slot casinos in our online casino lists offer up to 500 free spins for new players.

No deposit slots are yet another way to get free slot games. If you are offered an online slots real money no deposit option by an online casino, all you need to do is register an account to take advantage.

Best online slot casino games for new players

If you are new to online slot gambling (or even if you aren’t) and wondering what are the best slots to play online for real money then read on…

Essentially, there are 4 main types of online slot games, classic slots, video slots, jackpot slots (progressives) and 3D slots.

  • Classic slot games are based on the original slot machines from the early 1900s. They tend to feature classic icons of that period such as bells, melons, grapes and the number 7 (considered to be a lucky number) and are usually 3 to 5 reels and 7 pay lines. Although classic slots have had a bit of a makeover since their introduction, and now feature different icons and modern graphics, essentially they remain the same.
  • Video slots are the modern format of slot games. They are generally story led or based on a theme and feature superb graphics and pulsating audio that players seem to love.
  • Jackpot slots or progressives are the slots that many new players tend to gravitate towards. This is because as the name suggests they are where the massive casino jackpots are won. Often these slots are linked together in a network enabling them to take huge amounts of cash a percentage of which they will frequently pay out in jackpots.
  • 3D slots are virtual reality slots most commonly found at 3D slot casinos online. These games are not particularly popular as of now, though that may be because they require either a headset or other specialised equipment. Whether 3D online slot gambling will gain popularity in the future remains to be seen.

UK slot casinos that offer live dealer games

Most slot players love to just play slot games online. Yet many of the best online slot casinos offer other casino games too. Live dealer games are becoming increasingly popular and as a result, more and more slot casino sites are adding live casino games to their portfolio.

If you want to experience the thrill of live dealer casinos for yourself there are many options out there for you. Check out Ken’s list of recommended UK casinos and be sure to read the reviews so that you know which slot casinos in the UK also offer live dealer games.

Mobile slot casinos for players on the move

For people with a busy lifestyle that like to play slot games on the bus, there are mobile slot casinos. Anyone can play mobile slot games simply by downloading a real money slots app for iOS and Android. The beauty of online slot gambling on your mobile device is the sheer convenience of having all your favourite casino games in your pocket.

There is no intrinsic difference between online slots and mobile slots. They possess all the same features just in a smaller form factor. Mobile slots do need to be fully optimised for mobile devices though before they become playable on your phone or tablet.

Best Online Slot Casinos UK

Frequently Asked Questions

Slot players from all over the world love to ask me questions about slot casinos online and slot games. Many of them I can even answer! For your convenience, I have listed some of the most common ones below…

Are real money slots sites legit?

Real money slot sites are amongst the most heavily regulated businesses in the world. Slot casino sites operate under an iGaming license issued by a state-approved governing authority. The Gambling Commission was set up specifically to protect the rights of anyone playing at UK casinos.

Players outside of the UK are protected by independent gambling commissions in the Isle of Man, Malta, Gibraltar, Alderney, Sweden, Denmark, and Spain. What this means is that you as a real money casino player can have complete confidence that online slot gambling is operated in a fair and transparent manner according to the law. 

Can you play casino slots online for real money?

Yes, you can. Playing online slots for real money is incredibly easy. All you need to do is register an account at any of the best online slot casinos UK on my list and then deposit money using your preferred payment processor.

Which online casino is best for slots?

Of all the casinos in my list of online slot casinos, my top 5 recommendations would be…

  1. MrQ Casino
  2. Hyper Casino
  3. Jonny Jackpot
  4. Avenger Slots
  5. Slotty Slots

If I have a dispute with an online casino who can I turn to?

If you have any kind of dispute with a UK online slots casino it is ALWAYS best to contact their customer service department before you do anything else. However, if you cannot get satisfaction then please try the following…

In the UK, player disputes are handled by the Independent Betting Adjudication Service (IBAS) which offers dispute resolution to the iGaming and land-based casino industry. A player may turn to IBAS if negotiations with the online casino have reached a deadlock.

Outside of the UK, you should contact the gambling commission where the online slot casino is licensed. They may be able to put you in contact with an independent arbitration service in your area.

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