Best 101 Online Slot Sites December 2023

Best Online Slot Sites UK By Type

As you can see, we only select slot sites to play in that are important casino operators in the UK. From their overall features, we selected a game variety of hundreds of games or more because we know how important variety is. This is why we added UK casinos that have multiple providers involved.

Bally Casino – Best New Slot Site UK 

• 430 top slots with over 100 jackpot titles, Bally offers a promising rise in the industry. 
• The minimum deposit free spins with no wagering attached bonus allow you to try one of the hottest slots of 2023: Secrets of the Phoenix Megaways.
• You can find numerous slot games with extra features such as buy-in, drop-and-win, free spins, gamble, and more.

Bally Casino is one of the newest slot casinos released on the UK market. It has less than a year of work and it made it to our top as the number one. Its promotional page is astonishing and fair to all slots enthusiasts. 

Betfred – Best Slot Site Overall UK

• With over 500 new online slot games to choose from, Befred provides a reliable offering.
• This slot site features games from top-tier providers such as NetEnt, Microgaming, and others, so the site’s quality is guaranteed.
• Features such as free spins, welcome bonuses, first deposit promotions and multiplier incentives, jackpots, and bonus buys are readily available across a variety of themes and volatility levels to accommodate players of all skill levels.

Befred may not have as many slots as other new sites in the United Kingdom, but the variety and quality of its 500+ slots, as well as the first deposit bonus it provides make it a worthwhile option for casual and dedicated players as well as for our list of the best slot sites for winning.

 Luck.com – Editor’s Choice for the Best Slot Site UK

• Play slots from trusted providers like Slots Factory.
• You can play demo mode on certain titles, thus enhancing your online gaming experience.
• Welcome offer available.

Based on our long hours of testing, we strongly believe that Luck.com is a strong candidate for our top, even if it doesn’t have a rich game diversity. The fact that it offers almost all online slot game types is impressive. Unfortunately, the slots site only has 20 slots, which is too low to rank it first.

Monopoly Casino – Best Slot Site for Low Budgeters

• You will find +50 jackpots and 4 progressive jackpot slots on this platform;
• The minimum and maximum slots bet limits are £0.01 to £100;
• Overall, a variety of 1300 slots goes beyond the UK average of 500.
• You will find a Wheel of fortune bonus you can earn free spins on

Our CasinoAlpha experts have chosen Monopoly Casino because of the trustworthy experience that it gives to the user. It doesn’t matter if you are a high roller or currently playing on a tight budget. There are all the slot types available on this platform, a large number of slots, and popular providers such as NetEnt, Microgaming and others, which prove a competitive level of variation of this platform, making it our best choice in this top UK slot sites list. Moreover, the casino places high on our list of independent sites, which proves its authenticity.

Planet Sport Bet Casino – Best Slots Site for No Wagering Bonuses

• Planet Sport Bet brings+580 slots to play from respected developers like NetEnt, Pragmatic Play, and more for players to enjoy.
• Low, medium, and high variance titles mean all bankroll sizes and risk tolerances are accommodated.
• Players will find all the latest features, like cascading reels and Megaways, alongside classic slots for diversity across modern and retro themes.

After hours of testing, our specialists have come to the conclusion that while Planet Sport Bet Casino may not have as many slots as some competitors, the game selection is more than enough to satisfy both new players and the more experienced ones who are seeking quality and variety in titles, features, and themes from top-tier developers making it the site with the best compatibility for this place.

How We Test the Best Slot Sites (7 Steps)

Transparency is a key part of our review process. To stay true to ourselves, we present in detail how we work for UK customers.

The UKGC mainly focuses on:

• Providing responsible tools
• Pre-empting minor gambling
• Offering an overall reliable experience
• General prerequisites for safe play at a casino.

Step 1: It All Starts with a Valid Licence

The United Kingdom Gambling Commission guarantees the slot sites follow strict legislation. The terms are fair, the games are not pressuring you to play too fast, you have access to responsible tools, and your overall time spent there is positive.

A website licensed by the UK Gambling Commission always prevents minors from gambling. Thus, your children will be protected too.

Step 2. We Check Slots Sites’ RNG

Most top rated slots sites with a UKGC license also have their RNG systems vetted by independent third-party auditors.

We will look for online slots sites with RNG fairness seals from:

• eCOGRA
• Gaming Labs
• iTechLabs

Those add a layer of safety regarding the software and engineering of the games we have no way of testing ourselves.

Step 3. We Dig Deeper Into the Volatility of Slots

Slot game volatility means the likelihood of the result of a spin to be widely different each time.

There are two volatility phases:

• Low volatility – the game payout is the same range almost all the time, and the sums are never too high as compared to your bet
• High volatility – the game payout may be significantly higher than the bet, even if the bet was quite insignificant

We can check that by going in the game’s settings. In the rare cases when that is not public in the open game, we test it for two weeks and make our own assessment.

Step 4. We Never Miss Looking at the Paylines

Paylines are the embedded winning combinations that, when hit, will result in a winning bet.

The number of paylines must always be written in the game settings. Sometimes, the original number may be expanded in certain conditions, which fall in the special features category.

Step 5. We Analyse the Unique Features of the UK Slot Sites

Since there are thousands of games featuring different types of slot machines created yearly, the best ones need to have catchy features. We analyse them and tell you which feature is the best.

Here are the main ones:

• Multipliers – the number of times your bet result will be multiplied randomly
• Wilds – random symbols that appear and expand your bet
• Scatters – random symbols that create a payline where it wasn’t

Step 6. We Proceed with Making Bets

We test all of the settings and details with real funds. That is the same method you would use when playing, and we need to make the same steps you do so we can be your trusted guide.

Step 7. Overall User Experience on Mobile & Other Devices

Between 80% and 90% of online gambling is nowadays done on mobile phones and sometimes mobile tablets.

Thus, we focus on those types of devices a lot when we test the best online slot sites. We can then see if there are glitches and how they might affect your sessions.

Why Do We Use all These Testing Methods?

CasinoAlpha experts want to bring you the best gambling services that we confirm to be good first. We need hand-down testing, methods that are available to you and bring you the safest options.

We use objective testing and a team system to remove bias on any opinions we might have.

How to Choose the Best UK Slots Sites

1. Utilize CasinoAlpha’s monthly-updated database.
2. Read our reviews and additional bonus pages to learn about their offerings.
3. Register by following our instructions.
4. Complete KYC as quickly as possible to save time while conducting transactions.
5. Play securely and adhere to the attached Terms and Conditions.

New Slot Sites UK Rated for December 2023

When making our selection, we start from a baseline of high standards for new casinos in 2023, to be sure they reach our safety and playing standards. The rest is quite similar to any casino review we create. We look at game variety, considering the total number of online slots and the specific slot subcategories.

Barz- Newest Slot Site UK for 2023

• This site selection of slots exceeds the UK average number with +1200;
• You will find multiple game types such as classic slots, jackpots and more;
• You can start with a low deposit through Boku online casino mobile payments
• You can apply filters such as by provider, game type or others, when searching for slots

For a website that was released in 2021 to have so many features optimized for the British punter, it is a rare occasion. This is why our team of experts chose Barz Casino for our best new UK slot site for 2023.

For alternatives, explore our reviews of WatchMySpin and SpinRio if you feel Barz doesn’t live up to your expectations. While all our picks are thoroughly tested, you are free to explore all of the UK’s top new 2023 slot sites.

JeffBet – Runner-up for the Ultimate UK New Slot Site in 2023

With a range of slots of over 500 variants to choose from, JeffBet brings a solid selection to the table despite being a new casino launched in 2022.

• JeffBet offers a variety of modern video slots as well as classic and jackpot titles for diversity.
• Top providers like Microgaming are powering the 500+ game library so you can expect quality options.
• Popular slots like Mega Moolah are available, featuring exciting themes and high RTP percentages.

For a new slot games site that just launched in 2022, JeffBet has optimized its slot offering for British players with 500+ titles from leading developers like Microgaming.

While JeffBet doesn’t surpass other new casinos in terms of volume, the focus on curating a quality selection of modern, classic, and jackpot slots for a well-rounded experience makes it a worthy contender.

Type of Bonuses Available at UK Slot Sites

These are just a few subtypes of the best online casino bonuses that we work with daily. We know that each player can find a type that fits their needs, whether it is about slots with free spins, or live casino promotions.

Be Aware of the Following Aspects

1. Each slots bonus has unique terms and conditions attached. You need to stick to it and respect it, otherwise, you risk losing the bonus or the funds derived from it.
2. Cashing out before finishing wagering, when the issue is present, is impossible and may result in you losing your bonus.
3. Pay attention to the exclusive slots where the spins apply to avoid your bonus being voided.

Take time between sessions and bonuses for your own mental health.

Slot Game Types You Can Find on the Best Slot Sites

Most Popular Slots – Vetted by CasinoAlpha

When doing our selection for the best online slots to play, we’ve primarily taken into account player needs through extracting data of searches on our site. We know these are always trending. Then, we look at the bet ranges and look at the way they can suitably fit any budget for any player to.

Starburst – Online Casino Slot Best for Beginners

• The graphics are very attractive and are layered by a 5×3 grid
• It is created by a well-known provider and has had solid popularity since its release in 2012
• There are not too many symbols to confuse a beginner, just Wilds.

For a more personalised session on this game alone, CasinoAlpha’s authors have created a listing of Starburst free spins promotions.

Book of Dead – One of the Top Slots Online

• It has an Ancient Egypt thematic which is widely attractive to gambling users from the UK
• The bet limits are quite accepting of both casual and high-rolling sessions
• It has a classic payline number, totalling to 10.

Immortal Romance – High Volatility Best Online Slot Pick

• The most eye-catching feature it has is the high number of possible paylines.
• The most one can win is 12000 times the original bet.
• Some special features are unlocked during the game, so there are layers to a play.
• Each symbol, or a game character, may influence the end of a round.

Big Bass Bonanza – The Best Game for Mobile Slot Players

• The graphics of the game are highly impressive
• The provider Pragmatic Play is well-known for hits like Wolf Gold. Big Bass Bonanza continues their reputation for solid slots.
• The paytable isn’t too crowded with just 10 main symbols.

Find the Best Jackpots at UK Slot Sites

Our choices at this point are quite intuitive. We have chosen the jackpot slot games that have accumulated the highest jackpot jackpots over the years.

Advice for Safe Jackpot Play

1. The probability of winning the jackpot is tiny, so keep your hopes low.
2. As someone who has just learnt how to play slots online, or as a player who wagers on a strict budget, we advise you to limit your sessions to under 15 minutes a day.
3. There is a small percentage of casino bonuses based on them.
4. Progressive slot machines have lower chances of winning as compared to classic lottery tickets.

How to Play Online Slots – Basic Steps

Basic Steps to Play Slots

Your first and most vital step is to know the game rules and what each symbol or feature does.

The second step is to make calculations to reach a fixed slot play budget. Once there, never exceed it.

CasinoAlpha’s perfect budget formula is to first figure out your pocket money monthly, after bills, and your savings accounts. Out of that sum, 10% can be used for gambling. We highly recommend you don’t spend more than that.

The third is to choose a casino and a game.

The fourth step is to read the game specifications and rules once you launch it. Then, you can just play.

How Do Online Slots Actually Function?

They are software that is created on the base of a complex code. Their results are based on Random Numbered Generators, so there’s no room for rigged outcomes to the games.

How Do Online Slots Pay Real Money?

All of the games on UK online casinos can pay out real money if you use real funds and hit a payline.

Real funds play in the UK is tied to confirming your account and finishing KYC to prove you are of legal age and your payment services are legitimately yours.

Our Recommended Strategy when Playing at Slot Sites

Nothing is more important than managing your slots site bankroll wisely. There’s no complex strategy for the game itself, and therefore, the way to manage your funds is your pinnacle point.

After setting a budget you need to:

• Know the game well enough.
• Don’t bet high sums in general.
• Examine the paytable and know what symbols you’re playing with.
• Take breaks often.

When, If Ever, Should You Bet the Maximum Amount?

Betting the maximum sum allowed may get you closer to activating the jackpot special feature of certain sums. That, in turn, may give you free rounds, which essentially are you playing more with no spending.

But the probabilities are low for that to happen and are disproportionate to the investments. So, don’t do it more than a few times a year.

Payment Information & Advice

Here is CasinoAlpha’s guidance on slot site payments:

1. Don’t make high payments to slots sites you’re new to; play slots with a minimum deposit and keep it affordable.
2. Use payment methods that you are comfortable with. Look up e-wallet choices like Neteller casinos to shorten withdrawal times.
3. Don’t pick options that apply fees that obviously affect your bankroll.
4. Finish wagering before cashing out.
5. Make sure you don’t have any pending transactions before engaging in another one.

7 Reasons to Start Playing on Slots Casino Sites

1. They are highly appreciated in the gambling community and there is a large variety of gambling spinning games on the market.
2. Most of them have bonuses, some of which are free of charge or free of wagering requirements.
3. The deposits and bets you need to make can be small and protect your funds.
4. The slot games have an easy playthrough and don’t require complex strategies or calculations.
5. All of the casinos listed by us hold a license from the UK Gambling Commission and reviewed by a competent team of casino analysts. Some of them also have authentications from third-party gaming testing agencies.
6. They are a good option to start with for new gamblers.
7. All of them have responsible gambling tools that limit your play or spending the way you set them up to.

Best Ranked Game Providers Available at Slot Sites UK

Game providers shine the most when they are partnered with high-quality casinos. For example, some of the best casinos we have listed are top Microgaming online casinos or NetEnt casinos in the UK. They are SSL-locked, UKGC-licenses, and independently reviewed sites with thousands of new users signing up daily.

While these are business-to-business collaborations of two separate entities, the best IGT slots sites offer, besides their online gaming palette, whitelabel solutions to online casino sites. Thus, all of the items in the category share certain similarities.

Microgaming Is Our Choice for the Best UK Slot Provider

With over 600 online slots in its expansive portfolio, Microgaming stands out as the leading slot developer.

• Slot features are considered to be ahead of their time, from rolling reels to adjustable paylines for a better gambling experience.
• Renowned titles like Immortal Romance and Mega Moolah have set Microgaming slots apart.
• As a pioneer of progressive jackpots, Microgaming has paid out record-breaking multi-million wins.

With one of the largest slot libraries packed with innovations, record jackpots, and visually stunning titles, Microgaming has earned its place as the top slot provider for players seeking variety and quality.

NetEnt Remains a Favourite Provider Among Several Slot Sites Fans

With over 200 high-quality online slots in its portfolio, NetEnt is considered one of the top developers in the industry.

• This provider is known for having games with unique features like clustered pays that elevate the standard slot experience.
• Graphics of several slot titles are eye-catching
• The slots catalogue includes mega-hits like Starburst, Gonzo’s Quest, and Jack and the Beanstalk that have become player-favorites.
• NetEnt titles are optimized for mobile, so you can play top releases on the go with no loss in quality.

With its track record for creativity, exciting gameplay, and mobile-friendly approach, NetEnt cements its place among the best slot developers for players.

IGT Is Another Worthy Contender on Our List

• IGT slots are hallmarked by high-quality graphics and immersive, cinematic game experiences.
• Branded titles based on popular TV shows, movies, and celebrities like Wheel of Fortune provide added entertainment value.
• Classic 3-reel slots like Double Diamond and Triple Diamond are player-favorites renowned for gameplay simplicity.
• Modern 5-reel video slots offer depth with storylines, bonuses, special features and more gameplay variety.
• Return to player percentages meet or exceed industry standards for a fair and rewarding experience.

Our experts think that IGT games have something for any type of player, so we consider it to be a worthy contender on our top provider list.

With slots to suit all tastes, IGT’s blend of classics slots and modern titles driven by rich visuals and themes demonstrates its staying power as a top-tier developer.

Big Time Gaming deserves its place on the podium

Known for its innovative slot mechanics, Big Time Gaming has become a premier developer especially for Megaways slots.

• Big Time Gaming pioneered the Megaways engine which provides up to 117,649 paylines for tremendous winning potential.
• Popular Megaways slots like Bonanza and Extra Chilli exemplify the exciting cascading reels feature.
• Big Time Gaming also employs deep math models to optimize game stats like return to player.
• Slots are optimized for mobile play maintaining slick graphics and performance.

With the novel Megaways engine setting its slots apart, Big Time Gaming has carved out an unique niche. For players seeking new slot innovations with serious winning potential, Big Time Gaming delivers.

Pros and Cons of Slot Sites UK

Pros

• Easy to access and use on all platforms, mobile included
• Present a wide range of products from well-known gaming software producers
• Have multiple bonuses available at all times, including free spins, cashback offers and Wheel of Fortune
• Usually allow many deposit and withdrawal methods
• Have embedded responsible gambling tools that are quite efficient

Cons

• Some may have no other game options besides slots
• The terms may be hard to decode
• No other perks besides the basic whitelabel products

Why Trust CasinoAlpha

Our experts, Cosmin Brehoi and Chief Editor Tudor Turiceanu,  went through all the processes you would at slot sites. They created 56 of real accounts, tested over 60 of slot sites, deposited an average of £200, and cashed out a total of £10. They tested 10 games from each applicable game category. Ultimately, they recommend 10 best slot sites that meet our standards, Bally Casino ranked as number 1 slot site, followed by Betfred, Luck.com, Monopoly Casino, MadSlot, Buzz Bingo, PlanetSportBet, Rainbow Riches, Virgin Games, and Rhino.

It took us more than 50 hours to create the rankings for the best slots sites. That is, over the 17 hours we dedicate to each individual review. Our database was our starting point and your usual gambler steps were our road map.

We will make all the necessary modifications to this page if new information is revealed by the legislation or the big competitors in the industry.

Phases of Research and Analysis

1. Taking slots sites and our review and doing a double-check on its facts, authenticity proof and reliability.
2. Retaking the steps of a gambler that is looking to play online slots.
3. Playing and paying like an average UK player.
4. Comparing hundreds of casinos to the industry average to arrive at a temporary list.
5. Comparing the casinos to each other to get the tops you see here.
6. Discussing with other teammates to remove bias or the reasonable doses of subjectivity.