Best Slot Sites UK – 2021

Are you looking for the best UK slot sites? Well, look no further. Here at GamblingDeals.com, we search far and wide for the best slot sites online, finding you the online slot sites that are packed full of the most amazing slot games, free spins, and online casino welcome bonuses.

To get started at leading slots sites, check out our top slot sites list now. 1000s of slot games, sky-high jackpots, and the best slot sites are only a few clicks away. Rather hear more? Check out our slots sites guide to find out everything you need to know when it comes to joining, enjoying, and getting the most out of your online slot sites experience.

Slot Sites: The Definitive Guide

We have created the definitive guide to finding and joining the best slot sites online. Our top slot sites guide helps you learn everything there is to know about slot sites before you join up.

That way, you can ensure that you don’t miss out when it comes to finding the best places to grab free spins and play video slots online. Here’s the full lowdown:

• What are slot sites?
• What do the best slot sites have in common?
• How do we find the best online slot sites?
• How do we compare the best slot sites?
• What are the best slot sites?
• How do slot sites work?
• What are the best slot games at online slot sites?

Let’s get started.

What Are Online Slot Sites?

There are tonnes of different slot sites online. Some are traditional online casino sites or sportsbooks that have launched a video slots section, others are bingo sites that have launched slot games and online Slingo to complement their traditional online bingo offerings.

However, more and more we are seeing the emergence of pure-play slot sites that do nothing but provide the very best slot games and video slots online. Ensuring you get access to the ultimate online slots experience.

This means that you can join an online casino that offers hundreds of the best slot games, leading deposit bonuses, huge progressive slot jackpots, award-winning payment methods, and more. But what do the best slot sites have in common?

What Do The Best Slot Sites Have In Common?

Certain things stand out at all of the best slot sites in the UK. Whether it is the welcome bonus on offer or the quality of their mobile online casino site, slot sites that put you at the centre of their offering are the slots sites you should join.

To make your life easy, we have compiled a list of all of the best traits UK slot sites have focused on to hit our top sites list. If you’re ready, let’s dive in and take a look. Otherwise, find new slot sites via our separate guide!

• Leading slot bonuses for new and existing players – UK slots sites that focus on providing new and existing players with the best casino bonuses are well worth exploring further. We love to see slots sites offer matched deposit bonuses, as well as free spins both for existing and new players. All of our slot tables include the biggest slot bonuses online offering tonnes of bonus funds
• Clear and concise Terms and Conditions – it’s one thing offering great casino bonuses, but making sure players can understand how bonus funds work indicates that a slot site can be trusted. The best slot sites leave nothing to the imagination and show you exactly what you’re getting when you sign up as a new player
• The best online slot games – playing online slots made by the best software providers is the name of the game. We seek out the slot sites that offer slot games from leading game-makers like NetEnt, Microgaming, IGT, Playtech and more
• Chance to win major jackpots – it’s not just about playing the best slot games, you also want the chance to win big. The best online slot sites offer games with a wide range of paylines, progressive jackpot slots, and top bonus rounds that run into the millions
• Excellent customer service – we don’t like to see things go wrong for anyone at a slots casino, but if they do, we want to know that the UK slot site is ready to step in and help. The best slots sites will offer you several options when it comes to customer support; including live chat, email support, FAQ, and the ability to call up 24 hours a day
• Mobile functionality – playing games at the best online slot sites is only fun if you can do it whenever you want. The best sites ensure that their slot games, classic slots, and jackpot games are available when you are on mobile devices while out on the go
• Wide range of deposit and withdrawal options – having the ability to opt-in and deposit and withdraw funds using a wide range of payment methods is the cherry on the top when it comes to enjoying the best slot sites. We expect to see traditional payment methods offered, like debit and credit card, alongside popular e-wallets like PayPal, Skrill, and Boku
• Market-leading brand name  – it’s always good to know that you can trust the online casino that you’re playing on. Brands like PlayOJO, LeoVegas, Casumo and Mr Green are brilliant slots sites that have established awesome brand reputations with UK players. This new players confidence that they will get treated like kings every time they login and place a max bonus bet
• Superior usability across their platforms – it’s not only mobile slots experience that we care about. We want to see that slot sites offer premium usability across every real money channel. That includes things like extra spins and live casino whether you’re playing on desktop, mobile, tablet and more
• Security and licensing – it’s essential that slots sites are properly licensed and that T&Cs apply. Here at GamblingDeals.com, we only show you casino sites that are licensed to offer you a bonus amount by one of the significant gambling commissions. When it comes to UK slot sites, we want to see that they hold a licence with the UK Gambling Commission
• Award-winning – finally, it’s nice to know that slots sites offer award-winning customer support. The best casino sites in the UK usually don’t take long to rack up the best awards in the industry after new players start enjoying their depositing experience

How Do We Find The Best Slot Sites?

When it comes to finding the best online slot sites in the UK, it’s all about who you know at leading online casinos. Finding the best slot bonuses and welcome offers via GamblingDeals.com ensures that you are clicking through to the best slot sites, with the best new and existing slot bonuses online. But how do you know you are getting access to the best sites?

We have a team of people here at GamblingDeals.com that spend every day searching through the online casino space for the best slot sites, as well as the best Slingo sites. Once we come across a casino site that we like the look of, we carry out proper due diligence to ensure that they meet the high standards that we set. This includes ensuring that players are playing responsibly, return to player rates are fair, and that game weighting and withdrawal restrictions are properly applied.

The slots sites that make our top UK list are those who share a mix of the common attributes outlined above. And importantly, we only work with UK slot sites and online casinos that are licensed by internationally renowned governing bodies, like the UK Gambling Commission.

What Are The Best Slot Sites?

Check out our list of the best slot sites in the UK below. Our top list of the best slot sites constantly changes and evolves, but loosely we base our top 10 slot site list on things like slot bonus, video slots, game availability, payout rates, and simply how much fun it is to play on the site. Check out our quick-start list of top 10 slot sites now.

Best Slot Sites:

Top 10 Best Slot Sites Online

Check out of extensive list of the best slot sites online. Each of these slot sites offers the best slot games, excellent customer support, a wide range of payment methods, and tonnes of amazing welcome offers. Let’s get started.

1. All British Casino – 100% Up To £100 + 10 Free Spins

All British Casino is one of the best slot sites around. Known for delivering an awesome gaming experience, and first deposit bonus, All British Casino has grabbed tonnes of new players over the past few years. Not only can you play online slots, but you can play online casino games, online Slingo, and grab casino cashback bonuses.

All British Casino

100% Up To £100 + 10 Free Spins

T&Cs Apply

Claim Bonus

Sign Up At All British Casino Today!

2. Genting Casino – 100% Up To £100 Welcome Bonus

​We absolutely love Genting Casino and these guys could easily have sat higher up the best slot sites list. Genting are a brilliant online casino brand that has excellent user experience, tonnes of payment methods, and world-leading customer service. If you want to join one of the top online slot sites in the business, sign up at Genting Casino today.

Genting Casino

£400 Welcome Bonus

T&Cs Apply

Claim Bonus

Sign Up At Genting Casino Today!

3. My Play Casino – £200 Welcome Bonus + 100 Bonus Spins

​Mr Play Casino is a newcomer to our best slot sites list. They offer hundreds of leading slot games, as well as offer players a lucrative welcome bonus. If you are looking for a new slot site that is packed full of the best video slots, click through and join Mr Play Casino.

Mr Play Casino

100 Bonus Spins + £200 Welcome Bonus

T&Cs Apply

Claim Bonus

Sign Up At Mr Play Casino Today!

4. Buzz Slots – Bet £20 Get 110 Bonus Spins

Another newcomer to our slot sites list is Buzz Slots. Traditionally, Buzz is known for its offline bingo halls and amazing online bingo gaming experience. However, in recent years, Buzz Slots has also evolved into one of the best slot sites online. Packed full of the best slot games, online Slingo games, we’d strongly recommend you check them out if you are considering playing online slots.

Buzz Slots

Bet £20 Get 110 Bonus Spins

T&Cs Apply

Claim Bonus

Sign Up At Buzz Slots Today!

5. Wink Slots – 100% Up To £100 + 30 Starburst Spins

Wink Slots is part of the famous 888 Casino Group. Like 888 Casino, Wink Slots offers the best online casino games but focuses more on the online slots arena. That means not only can you grab an amazing welcome offer when you sign up, but you can also play top slot games from game providers like NetEnt, Microgaming, and NextGen.

Wink Slots

100% Up To £100 + 30 Free Spins

T&Cs Apply

Claim Bonus

Sign Up At Wink Slots Today!

6. OJO Casino – 50 No Wagering Spins

We’re sure that you have seen OJO Casino all over your televisions recently? OJO Casino is a new UK casino that offers players the best no wagering bonuses around. When you join OJO Casino you will get a bundle of no wagering spins to enjoy, and you can also access amazing slot games, from all of the best slot game makers.

OJO Casino

80 Free Spins No Wagering Requirements

T&Cs Apply

Claim Bonus

Sign Up At OJO Casino Today

7. Betfred Casino – Bet £10 Get 50 Free Spins

Next on our best slot sites list is Betfred Casino. Betfred Casino is the online casino arm of the UK-leading sportsbook brand, Betfred. If you want to join one of the best slot sites around, safe in the knowledge that you can also play online casino, bingo and sports, Betfred Casino is for you.

Betfred Casino

Bet £10 Get 50 Free Spins

T&Cs Apply

Claim Bonus

Sign Up At Betfred Casino Today!

​8. Casinoland – Get Up To £800 Welcome Bonus

One of the best new slot sites around is Casinoland. In fact, Casinoland could easily sit much higher up our list of the best slot sites. Play top games like Age of Gods, Rainbow Riches, Cleopatra, and other leading video slot titles. On top of this, grab yourself a huge casino bonus that triggers on multiple first deposits.

Casinoland

Get Up To £800 Welcome Bonus

T&Cs Apply

Claim Bonus

Sign Up At Casinoland Today!

​9. Playzee Casino – Get Up To 500 Bonus Spins

​Playzee Casino is another new casino that is focusing on your new player gaming experience. When you join Playzee you can earn Zee Coins, which bag you special bonuses like free spins. What’s more, you can. get a huge bundle of free spins just for signing up as a new player. What are you waiting for?

Playzee Casino

100% Up To £300 + 100 Zee Spins

T&Cs Apply

Claim Bonus

Sign Up At Playzee Casino Today!

10. Jonny Jackpot – Get Up To 500 Bonus Spins

Making up our list of the best slot sites is Jonny Jackpot. Jonny Jackpot is one of the best new online casinos around and offers an extensive slot games section with over 800+ video slots. If you are looking for an endless list of the best slot games, from top game makers then Jonny Jackpot is for you.

Jonny Jackpot

Get Up To 500 Bonus Spins

T&Cs Apply

Claim Bonus

Sign Up At Jonny Jackpot Today!

How Do We Rank And Compare The Best Slots Sites?

Ranking the best UK slot sites is not an easy process. Several important factors need to be taken into consideration before we can compile our top sites list, regardless of the promo on offer. Here is a breakdown of the things we look at when comparing the best online slots and online casino sites.

Welcome Bonuses And Existing Customer Online Casino Promotions

There are three different types of slots bonuses that you will find on UK slot sites. Sometimes the best slots sites will combine these deposit bonuses into one easy to digest welcome package. However, some video slots sites will base their entire proposition around one type of deposit bonus – here’s what you need to know.

Matched Deposit Bonus

Matched deposit slots bonuses are one of the most common forms of welcome bonuses out there. When you sign up with slot sites, you will be offered a deposit match or matched deposit bonus that looks something like this:

• 100% Bonus Up To £300

This means that the UK slot site will offer you a deposit match up to the value of £300. For example, if you deposit £200 into the online slot, then you will get another £200 to play your favourite slot games. This means you have an initial betting balance of £400 to start your journey. However, if you place a max bet of £300, this you will get a £300 deposit match.

On top of this, some slot sites will give you even more bonus funds to play with by increasing the deposit match percentage. Instead of giving you 100%, they will give you up to 300%. For example, you will be offered:

• 300% Bonus Up To £300

In this example, if you were to deposit £200, then you will get £600 in total to play your favourite slot games. This is one of the best ways out there to get tonnes of free bonus funds to bet in the best UK slot sites when you join.

Free Spins

Free spins are another great type of bonus that the best slot sites offer. When signing up for an account, you will notice that you can access free spins on certain slot games as a way for you to spin the reels and potentially keep your spins winnings. For example, you might see something like:

• 100% Bonus Up To £100 + 300 Free Spins On Book Of Ra

This type of match bonus gets you 300 free spins on top of your matched deposit bonus when joining the slots site. In this instance, the free spins will only be available on the Book of Ra slot game. However, you will have 300 free spins to try your luck. That is absolute gold to any serious slot site VIP or new player. UK sites will even give you free spin packages to use on any slot games across the site. These types of offers are certainly worth taking advantage of when you see them.

No Deposit Bonus

Another option for new depositors is a no deposit bonus. Regardless of the wagering contribution, no deposit bonuses allow slot players the chance to take up a max bonus bet, without actually depositing any of your own funds. This can either be in the form of a match bonus, or free spins offer. Typical no deposit bonuses will look like this:

• 50 Free Spins No Deposit Bonus

What this means is that you will get 50 free spins, regardless of whether you classify for the new depositor terms. Essentially, you can spin video slots reels without having to risk your own funds. Top brands like PlayOJO offer amazing welcome bonuses on a no deposit bonus basis. Not only do you get free spins, but the bonus valid terms do not require a deposit.

Wagering Requirements

When we evaluate the quality of a new player bonus, we always look at the wagering requirements that are stipulated. Wagering requirements are used by slot sites to ensure that bonus funds are not withdrawn from the site by new players before being used. However, some slot sites abuse their powers.

We are happy to see fair wagering requirements stipulated on new player bonuses as long as they are within reason and not designed to ensure that players have zero chance of walking away a winner when using their slots bonus.

Every slot bonus on GamblingDeals.com is shown alongside wagering requirements so that you can adequately assess the bonus before clicking through.

Slot games selection

The best slot sites are brilliant at compiling the best slot games online. They partner with all of the best game builders, including Microgaming, NetEnt, Playtech, and Novomatic. They ensure that their game sections include classic slots like Rainbow Riches, Age of Gods, and Starburst. Here at GamblingDeals.com, we don’t just review the best slot sites; we also carry out comprehensive reviews of all of the best slot games online. That gives us the unique ability to assess whether UK sites are bringing you the best slot games.

What’s more, slots sites don’t just care about offering you the best slot games. In fact, top slot brands like PlayOJO, also offer casino games like live casino, blackjack, and roulette. When you are playing with cash funds, or bonus wagering, the best slots sites, and mobile casino sites will always carry a large range of leading casino games.

Slot Jackpots

It’s not only the best slot games that we care about seeing, and we want to know that you have access to the huge slot jackpots. The best slot sites know that you are hunting for big payouts, that’s why they offer games that give you the chance to win big. Games like Mega Moolah pay out jackpots in the millions. What’s more, some casino sites offer games with progressive jackpots where the jackpot builds across many different slot games and sites. When we compile our list of the best UK sites, we always ensure that you’re clicking through to play slot machines with the best progressive jackpot slots.

What are the other critical factors we assess at UK slot sites

The best slot sites also offer an abundance of benefits when it comes to customer experience, player safety, and deposit and withdrawal options. When our online casino review team reviews whether a slot site is ready to appear on our top sites list, we always make sure that our review looks at these critical factors.

How Do Slot Sites Work?

If you’re not sure how slot sites bring to market such amazing slot games, then let us clear things up. When you click through to join slots sites, you will notice that many of the slot games available on the site are similar to those on other leading casino sites. That’s because it is slot game makers who develop the video slots and slot games, they then lease them to slot sites which offer you the chance to play. What does this mean for you when you’re trying to find the best UK slot sites to join?

Well, firstly, you need to make sure that the online casino offers the slot games that you want to play. Some mobile slots sites will only provide games made by one or two providers, while others will have a much broader range. What’s more, you will need to assess all of the other things that the site can bring. For example, do they have a wide range of payment methods on offer? Do they have an excellent brand reputation with fantastic customer service? If so, then they’re worth checking out and signing up with. To find out which slot providers each site works with, check out our detailed slot site reviews.

Why Should You Join The Best Slot Sites?

There are three big reasons why new players play online slots. The first is that slots are a great way to play for jackpots. It’s not uncommon for players to win thousands (or even millions) of pounds when hitting slot jackpots. Some of the best slot sites online often have a range of games where the jackpot has run into the millions.

Not only is it about chasing jackpots, but it’s also fun to play online slot games and grab great welcome bonuses. Here at GamblingDeals.com, we work with slot sites all day long to bring you the best slot bonuses and to connect you with the best slot games. In the last few years, there has been an explosion of slot games (made by top game providers like Microgaming, IGT, and NetEnt) coming on to the market.

New games like South Park Slots, Tomb Raider Slots, and Twin Spin are just a handful of great games that you can enjoy. What’s more, having the chance to grab a welcome bonus that provides you with the opportunity to play these games for free is a real buzz.

How Much Money Can You Win At UK Slot Sites?

Let’s provide some context for you. When it comes to the largest ever slot site wins, there are some massive numbers to shout about. The largest-ever jackpot win online happened on the famous Betway Casino. Jon Heywood was playing the popular Microgaming slot game, Mega Moolah. Little did he know that he was about to stumble onto the biggest ever slot sites jackpot win of all time. Jon bagged himself $20m in one single spin. Can you imagine the delight?

It’s not only Jon who has won big. Several players have become multimillionaires off the back of playing at popular slot sites. For example, one lucky Finish player who chose not to be named won 17m Euros off the end of a 25c slot spin when playing online with slot site, Paf Casino. His game of choice was the famous Mega Fortune, which was developed by award-winning developer NetEnt.

What Are The Best Slot Games Available At UK Slot Sites?

There are some brilliant slot games available on the best UK slot sites. Some of our favourites are the games offering the biggest jackpots, like Mega Moolah and Mega Fortune. However, there’s so much more to shout about.

• Cleopatra Slots – made by IGT, Cleopatra slots can be found on many of the best slot sites in the UK. Cleopatra has an RTP of 95.02% and allows you win huge multiples on your original stake. We love Cleopatra as it’s an old classic that reminds you of the Vegas slot halls of yesteryear
• Monopoly Big Event – based on the famous board game Monopoly, this fantastic slot game follows the same format that you’d expect to play with your family at Christmas. The RTP rate is high at 95.02%, and there is a chance to cash out with 2000x your original stake. That’s why it’s one of our favourite slot sites game
• Gonzo’s Quest – made by NetEnt, one of the best slot game builders in the business, Gonzo’s Quest allows players the chance to win 2,500x their stake. The game is based on the Mayan’s and offers players tonnes of features and chances to win. It’s certainly up there as one of the best games at UK sites

Can You Join Mobile Slot Sites?

Absolutely. When it comes to playing the best online slot sites, it’s vital that you can play on mobile. These days, if slot sites don’t offer you the chance to play via your mobile device, then they are not worth your time. The question instead is whether they provide you a mobile site or a dedicated mobile app. The best slot sites often allow their players the chance to download their mobile apps to play slot games on the go.

When you are looking to join your next online slot site, why not check out whether they offer a dedicated mobile app. If so, click through and get yourself signed up for an account before you download the mobile app. That way, when you click on to your iPhone or Android device to play, your mobile account will be ready and waiting for you. One of our favourite things about the best slot sites is that they always make it easy for players to play online slots while out and about and on the go.

Are Slot Sites Safe To Use?

Of course. Here at GamblingDeals.com, we only work with slot sites that are licensed by an internationally recognised regulatory body. In the UK, that body is called the UK Gambling Commission (UKGC). However, other leading institutions that slot sites are regulated by include the Malta Gaming Authority (MGA) and the Gibraltar Gambling Control (GGC) and others. Whenever you click through to join UK slot sites, or sites based overseas, make sure that they are regulated. That will ensure that the online casino is operating in a trustworthy manner.

To ensure your safety, always click through to the best slot sites via GamblingDeals.com. That way, you will know that the slot site is adequately regulated and acting in above board.

What Are The Best Payment Methods At UK Slots Sites?

When it comes to finding the best payment methods at online casino operators, there are some great options for new players. When you are looking to deposit real money into slots sites or an online casino, the first thing you should do is check out the payment method section. UK players should get access to traditional payment methods like debit card, bank transfer, and pay by phone. Likewise, new customers should also be able to access popular e-wallets, like Neteller, Skrill, Boku, and PayPal.

If you are looking to pick up a match bonus, or want to guarantee your bonus funds, always check the T&Cs for expiry information. While some slots sites allow you to place a min deposit to access your bonus funds, others will require you to use a certain payment method to guarantee your bonus.

Best Slot Sites UK Summary

Whatever you are looking for when it comes to finding the best slot sites, make sure that you only play with online casino sites that are leading the market. That means sense checking their credentials against the main points we have pulled out in this review. Always make sure that the slots sites you join are trustworthy and safe to use. After that, ensure you get access to the best online slot machines, slots bonuses, market-leading slot games, and the very best slot jackpots, and bonus terms available. If in doubt, check out our slot bonus tables now to find the best slot sites online. What are you waiting for?