Best Online Slots

Best Online Slots – The world of online slots is an exciting and ever-changing one. In fact, it’s changing so fast that by the time we update this site, there will inevitably be something new for us to report on. Especially with such a regular influx of new online casinos on offer.

With the industry moving so rapidly, it’s not right that YOU must go out and do extensive research each time you would like to play at a different site. That’s where ‘Best Slots Online‘ comes in. We are here to help guide you by offering an impartial slot review site that promotes only the very best online slots sites!.

Best Casino Sites Table

Rank Casino Bonus Rating Visit
1 100% up to £111 + 100 extra spinsFull T&Cs apply 18+. New players only. One bonus offer per player. Minimum deposit £10. Bonus spins on selected games only and must be used within 72 hours. Bonus funds must be used within 30 days otherwise any unused bonus shall be removed. VisitReview
2 mr play 200% up to £200 + 100 SpinsFull T&Cs apply 18+. New players only. One bonus offer per player. Minimum deposit £10. Bonus spins on selected games only and must be used within 72 hours. Bonus funds must be used within 30 days otherwise any unused bonus shall be removed. VisitReview
3 100% up to £100 + 10% CashbackFull T&Cs apply 18+. New players only. One bonus offer per player. Minimum deposit £10. Bonus spins on selected games only and must be used within 72 hours. Bonus funds must be used within 30 days otherwise any unused bonus shall be removed. VisitReview
4 mr green 100% up to £100 + 200 spinsFull T&Cs apply 18+. New players only. One bonus offer per player. Minimum deposit £10. Bonus spins on selected games only and must be used within 72 hours. Bonus funds must be used within 30 days otherwise any unused bonus shall be removed. VisitReview
5 play ojo Up to 50 Free spins - zero wageringFull T&Cs apply 18+. New players only. One bonus offer per player. Minimum deposit £10. Bonus spins on selected games only and must be used within 72 hours. Bonus funds must be used within 30 days otherwise any unused bonus shall be removed. VisitReview

We’ve literally done all the hard work for you.  We’ve compiled an extensive list showcasing the hottest slots titles being played in the UK and all the best places to play them at. Also, we include a strong list of free online slots to play with no deposit (because sometimes we just want to play for fun!).

We’ve asked ourselves the question ‘what are the best slot sites to play at?’ so that you don’t have to. So which are the best slot sites in the UK? Check out our ranked table below to find out what we think.

Best Slots Online – The Best Online Slots Games 

We will keep you updated on all new slot games as and when they are released and continue to test and review all other existing slots. 

Here we will only display a carefully selected shortlist of the very best gambling sites, take a look around and see what you like the look of, safe in the knowledge that whatever you choose has been given our approval following extensive research and testing.

The selected brands offer a huge selection of the best online slots games from all your favourite software providers including; Netent, Microgaming, Playtech, Novomatic, Betsoft & IGT. These are the best online casinos in the UK, guaranteed.

Best Slots Online – The Best Online Slots Bonuses Available

Some brands offer free spins immediately upon registration. It is always worth trying out these casinos so you can get a real flavor of the site without committing any cash first.

Some of the Best Online Slots Bonuses available to new players can be found here at Best Slots Online. If you’ve decided where you would like to play online slots to win real money then make sure you understand the slot bonus on offer. Remember though, before trying to find the biggest casino bonuses in the UK, it’s always a good idea to check out the no deposit slots UK that are available at all of our listed casinos before you play for real money.

Also don’t forget, when it comes to bonuses it’s not about the size but the terms. The first rule is to avoid all fantom bonuses – those that are offered for playthrough only and deducted upon withdrawal. Those will get you bundled and in fact lower your winning odds. So make sure to stick to casinos offering cashable bonuses.

Best Slots For Wagering

Several of the best online slots sites now have zero wagering requirements on all spins, including on free spins promotions. Not all slots sites have adopted this approach though, yet.

In some instances, there will be some wagering requirements attached to slot bonus on offer. Always be sure to check the T&C’s before playing at online slots sites and if you haven’t already, you can subscribe to us to keep updated on all the latest news in the world of online casinos.

Quite often, a popular way to make best use of a bonus like this is to play slots that can offer a very big payout.  There are several UK High variance slots that can achieve this on offer. 

It’s important to point out that “Megaways Slots” pose a good opportunity when it comes to achieving a strong return on your deposit.  These kind of slots also wager quite well when it comes to completing wagering requirements.  For example, our favourite slot to complete wagering with is Bonanza Megaways.

Here’s a great resource to learn about the best Megaways slots available.

Top 10 Megaways Slots

Best Slots Online – All The Best Casino Bonuses

We always make sure that the slots bonus on offer from each casino brand is the very best one available. Each brand will usually have an array of different types of welcome bonus for different types of casino promotion.

Slots are by far the most popular choice for casino players which is why we focus on these particular types of bonuses at slots sites. That doesn’t mean that fans of roulette for example, wont also have some fantastic bonuses too, because there is something for everybody here.

This website was created in order to sift out the bad from the good, this means that only online slots promotions from trusted casinos can make it onto our best slots sites table, and even then, the bonuses have to be of epic-proportions to please us!.


Best Slots Online – Our Personal Promise

Here at Best Slots Online our mission and promise to you reading this is that we will continue to work hard and leave no stone un-turned in our pursuit to keep up to date with the casino world.

This means that not only will we continue to assess and review casino brands and their offers with close scrutiny, but, will also keep ahead of the market for new developments in the industry as a whole.

The igaming industry is developing massively with all the latest casino games improving, as technology continues to advance. Best Slots Online will continue to lead the way and be your preferred guide to all things casino.

Best Slots Online – Best Online Slots Sites in the UK

We thought it would be helpful to compile a list of the Best Slot Sites UK 2019, assessing the casino sites based on a number of different factors and qualities such as reliability, customer support, online casino security, games and software, languages and currencies, timely payouts, casino bonuses, promotions… and beyond!

Our recommended online casinos are 100% safe and secure, tested, reviewed and ranked. To learn more about an online casino, click on a casino name to read a detailed review! For more information on the best slots games to play, head towards our slots review section.

Our selection of Best Online Slots Sites has been selected from 147 online casinos that we have tested and reviewed. All scored over 90/100 upon testing and offer the best value and enjoyment in our opinion.

You’ll be pleased to know also that, each casino listed here has the very best welcome offer available to Best Slots Online for all new players, giving you the VIP treatment right away.

Have a look around at each of the Best Slot Sites and decide for yourself which one takes your fancy and then give it a whirl when you’re ready.

Best Slots Online – How Do We Choose The Best Online Slots Sites?

Our team comprises of a dozen casino experts from within the industry and we put in extensive research and hours into testing all the UK regulated Casinos on offer.

We look at a number of criteria, including; safety, quality, selection, uniqueness, payout speeds, RTP, welcome offers, customer support, previous notable winners, slots games on offer.

These are just some of the things we have to consider when compiling an extensive overview of an online casino. All this must be done before we will give an online casino the Best Slots Online seal of approval.

The Best Online Slots Sites Reviewed

If you’re looking for the latest online slots bonuses, you’ve landed at the right place.

At Best Slots Online, we bring you the best Welcome Bonus Offers, No-Deposit Bonuses, Free Spin Offers, and ongoing bonus promotions for UK online casinos.

All the casinos listed and reviewed on Best Slots Online are UK Regulated. So, when you decide on a casino bonus you can have peace of mind while you spin slots, play table games and layout your cards.

The Best Online Slots Bonuses

Most online casinos offer some kind of welcome bonus, aka a sign-up bonus. These are deals with extra credit for new players who sign up at the casino. Some places will also offer a free signup bonus such as free spins or £5 free no deposit bonuses.

These are given before you put in any money – they are usually a small sum that you can play with to decide if you like the place or not. Then there are welcome packages, which include bonuses for the first few deposits, along with some extra free spins thrown in for good measure.

Casinos offer these deals to try to stand out from the hundreds of other options out there – they know the quality of their promotions are important to attract and keep players.

What Makes a Good Casino Bonus?

  1. Percentage of the match – 100% up to £100 or 200% up to £100? etc .. The higher the matching percentage, the more value you’ll get per pound deposited. Especially, if you are on a restricted budget, a higher match will get you further for less.
  2. Wagering requirements – The WR is how much you need to wager before withdrawal, so if you plan on withdrawing your wins, look for a deal with a low wagering requirement (or even better, choose one with zero wagering requirements). It directly affects your bonus’ actual value. The average is around 35x.
  3. Games to play on – This applies mostly to non-slot players. Game contributions towards the WR vary for table games and video pokers. If these are your thing, look out for table games and live dealer promotions – the terms will be better than the regular offers. Also, some casino offers are only valid on limited games, so check.

Other Common Types of Bonus Offers

It’s a tough business, an online casino bonus is the best way for them to attract new players and retain existing ones. Casino bonuses come in all sorts of varieties, and with a bit of hunting around, you can find a bonus for just about every occasion.  

The player is king when it comes to online gambling, and seasoned pros often play at multiple casinos to take advantage of the full range of offerings available. Below is a comprehensive list of the different types of casino promotions available, grouped according to stages from the moment you decide to sign up.

  • No Deposit Bonuses– Sign up at an online casino, and you’ll get free casino credits or spins, without having to deposit anything. These tend to be on the small side.
  • Free Spins – Free spins are always a favourite for slot players. As the name suggests, you get a number of free spins to play on slots. These can come in the form of welcome packages, weekly promos, and new game launches.
  • High Roller – If you like to bet big and go for the gold, then keep an eye out for high roller deals. These have a lower matching percentage but have a higher limitation to the actual amount you can claim.
  • Mobile – Extra pounds just for playing on your phone or tablet. It’s as simple as that. Usually, this is a one-time offer to get players to try the casino on their mobile devices.
  • Free Play– Think £1,000 for 12 hours. Like the No-deposit bonus, the free play gets you casino credits without making a deposit. You’ll get more credits to play with but under a short time limit. Free play deals are a rare breed but they are great fun and fantastic for sampling the casino thoroughly.

Play The Best Online Slots With Peace Of Mind

We, like you, absolutely love our bonuses, in whatever form we can find them. But before we get to the bonuses, there are a few basics to keep in mind whenever you gamble online.

First and foremost, since we’re a UK focused site, we can’t stress enough how important it is for any casino, poker room, bingo site, or sportsbook you choose to operate within the confines of the UK Gambling Commission.

This not only keeps things legal for you but also ensures your safety when it comes to depositing/withdrawals.

Slot Reviews

The transition from online slots to mobile slots games has not always been an easy one. Some of the best online slots created to be perfect online do not always render as nice on the small screen.

But with the advance in mobile phones and tablets, online casinos have started providing real mobile casino games offering worthy of their online desktop counterparts.

Real money mobile slots

Gaming slots, slot machines, fruit machines, fruities, pokies… different words for the same great online gambling games we all know and love.

They have become symbolic with the glamour of Vegas and slots casinos everywhere. When those reels line up, the casino slot game flashes and the bells and sounds of a jackpot sing… it can turn grown men into dazzled children.

In fact, we would argue that the moment video slots went from your brick and mortar to your gaming casinos online, their popularity increased tenfold. Many people have never played on a physical real money slots machine, but on hundreds of their online cousins.

This is because online and mobile slot machines, in our opinion, are basically just games and a great form of entertainment. Some people love Halo or Farmville. The rest of us spin those reels and hope.

But why do people play mobile slot machines?

It’s the simplicity of the game that most of us love. There are no complicated slot rules. No long list of slot strategies. You pick your coin, pull the lever and let Lady Luck do her magic.

Although there might not be any physical lever to pull, the feeling is still the same. In fact, the hardest decision you’ll have to make is which one of the above real money slots you’ll want to pick.

Whether it’s phone slots with bonus games, classic slots, or games with themes like animal or movie slots. Let us help you find the best online slots and just relax and watch as the reels spin.

How to play mobile slots online

Yes, video 5 reel slots or 3 reel classic slots are simple. But still, they vary enough in their rules and gameplay to require a deeper look. Depending on the in-game slot features and coin value, you can play very different types of mobile casino slot machines.

You should always take into account the minimum and maximum requirements on the casino games so you can tailor your budget. As a rule, you should always try and play all the reels in each slot game to maximize your chances of winning. So be sure that the coins minimum and bet per line can account for all the reels.

Once you decide how many bets per line and the amount per line, you can press the button and spin. The random number generator spins the reels until the symbols come to rest. The mobile game will then payout according to its paytable and bonus features. The HTML5 slots payouts differ per game so be sure to check the individual paytables to see if it’s the one for you.

The basics of mobile casino slots

  • Bet Max Button: The player chooses to place the maximum number of coins on the paylines chosen.
  • Gamble Button: A popular bonus feature, after a win you can gamble to double your winnings or lose it all – usually on a pick of two choices. (spin of a coin, pick the right card, etc…)
  • Lines: The number of betting lines you can bet real money on. This can be as little as 1 to 99+ lines.
  • Bet Per Line: The player decides how much they want to bet on each of the paylines. (Paylines can range from 1, 3, 5, 8, 9 paylines all the way up to 1024 ways to win with no real paylines) Think of the bet per line as a multiplier – x 1, x 2, x 3, etc… usually x 5 tends to be the maximum.
  • Spin Button: Spin it. Win it.

Here’s our complete list of all the best online slots and mobile slot terms you’ll come across.

Should I play progressive jackpot mobile slots?

Mobile progressive jackpot slots are on the rise. That said, there are fewer of these in the online mobile slots sites world than there are in general desktop casinos. So the amount tends to be smaller and harder to hit. That said, big mobile wins are starting to be more common and definitely worth pursuing, one of the biggest being on Mega Moolah jackpot slot, hitting over 3.7 million!

What’s the difference between in-game jackpot and progressive jackpot slots?

In-Game Jackpot Slots: These have an internal fixed jackpot. If you get the jackpot symbols, then you win the jackpot amount. This casino jackpot does not accumulate over time but is easier to hit than progressive jackpot slots.

Progressive Slots: When real money mobile slots are part of a network of online casino sites, a small percentage of the amount players pay contributes to one big jackpot prize. So the more players that play, the bigger the jackpot gets.

Although they are harder to win than in-game jackpots, the bigger jackpot amounts (often into the millions) have made these increasingly popular. One of the biggest ever payouts online being on Mega Fortune slot title at over 17 million.

Playing mobile slots when you want to, how you want to!

When slots went online everyone cheered. Now we could play 24 hours a day, 7 days a week. Only you couldn’t really. You were still tied to your laptop or computer.

Now that you have online mobile casinos, it is possible to play mobile real money slots whenever you want – and not just in the comfort of your own home. You can play slots for real on your Android mobile phone or tablet, your iPad or iPhone with a multitude of mobile devices supported.

It is revolutionizing some of the best online slots on mobile, not just in the quality they have to offer in order to compete with their online relatives.

However, because we truly believe that this will become people’s preferred method of playing any type of real money casino games like blackjack, video poker, roulette, and bingo, not just mobile slot games.

Online Casino Games

As previously stated, online slots are officially the most popular of all the online casino games and are played worldwide these days by an ever-growing audience.

There are now literally thousands of online slots games available to play. So, it is also advisable to take a look at which slot games and software providers are the highest-rated and why.

Games such as Gonzos Quest, Cleopatra, Rainbow Riches & Starburst are just some of the most popular online slots games, but, there are plenty of other noteworthy slots that you may not have encountered before.

The advancements made in online slots technology in the past decade have been nothing short of astounding, and it’s been one heck of a ride for us watching it all develop.

Our aim is to also keep you updated with relevant casino news and articles on all exciting technological changes in the igaming industry, leading up to 2020 and beyond.

Online Slots Popularity

Online Slots are so popular that they are now played by over 10m people worldwide. This is mainly thanks to advancements made in mobile technology making mobile slots more accessible.

The freedom that comes with playing online slots on a mobile phone has helped to spawn a whole new generation of online slots player.

New Slots Sites are emerging with frequent regularity these days and this helps to keep the existing casino brands on their toes and remaining consistent with slots bonuses.

However, with every new slots site comes some element of risk and any new casino site should be approached with caution. Make sure that the casino is regulated and accepts players from your country.

Wherever possible we will try to include at least one or two brands that offer free spins without deposit. For more about this, you can visit our best free online slots section.

Each brand displayed will have the best signup offer available for new players, to have access to this simply click on ‘Visit‘ at your chosen casino(s).

If you want to dive straight into some free spins then head for Play OJO and get a VIP welcome bonus of 80 free spins. The standard offer from this casino brand is 50 free spins.

There are more google searches for free slots games than any other type of casino bonus. Play OJO is the highest-rated of all casinos that offer free online slots with 80 free spins for new VIP players.

Online Slots – Best Deposit Bonuses

For regular online slots players who simply want to dive into the best online slots deposit bonuses, we have several options for you to choose from our high-rollers list.

Yeti Casino is popular amongst this category of player and offers a very generous initial welcome bonus. This online casino site has also churned out some pretty sizeable winners too.

You may have already decided on which online slots game(s) you want to play, and are just in search of the best online casino to play at.

Throughout our selection of best online slots sites, we have 1000’s of different online slots games at your disposal.

With a bit of luck, we may even be able to help you find some free spins for your favourite slots game at one of our top online casino sites.

Best Online Slots In The World

Best online slots are available to players from all around the world (with a few exceptions) but it is important to ensure that the casino you want to play at accepts players from your country.

We recommend you use our country pages to help guide you in your search for the best online slots sites in your specific area.

All of the casinos listed have passed the relevant checks for licensing and security in each country. Making sure the correct licensing is in place is important should you have a dispute.

For example, UK slots fans would raise any disputes over payments or anything else with the UKGC (United Kingdom Gambling Commission). This type of added insurance is always recommended to players.

You will also be able to study everything you need to know about slot machines including their origins and how they actually work.

Online Casino fans can learn all about how the slot machine developed into the hugely popular internet pastime that it is today.

Best Online Slots Payout Percentages

Something that should also be considered when playing online slots is the payout percentages on offer. We go into greater depth regarding this in our Best Online Slots Payout Percentage article.

There you will find all the relevant information on slots payout percentages, and various slots games we have come across with favorable payout percentages.

One of the notable online slots games on the list is Book of Dead Slot. This slot game is one of the most well-known of our featured slots and needs little to no introduction.

This hugely popular online slot was developed by Novomatic Slots and is just one of many slots games developed by Novomatic. Book of Ra can be played at most of the online casino sites found here.

But there are other games that have similar RTP levels as online slots and can have the same payout potential. A good example of this would be Monopoly Live which was recently released by Evolution Gaming. It is based on the same concept as the Dreamcatcher wheel but has a Monopoly theme with extra features. We just wanted to give the game a wee mention here since we play it so much!

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Best Slots Online
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