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Play Free Slots Online in the UK 2025
Updated by James Briscoe
Editor
Fact Checked by Lee James Gwilliam
Senior Vice-President
Looking to play free slots at online casinos in the UK? You've landed in the right spot! My guide covers everything you need to know. It includes a massive list of over 1,500 slot machines, and lets you know where you can play them.
The filtering tools make it easy to find the games you're interested in, and you can toggle to only see, say, 'Progressive Slots' if that's your thing. Give it a try and see what you find.
⚠️ Note that gambling is for adults, so you must be 18+ to play these games, even if they're are fee.
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How To Play Free Online Slots
Our casino experts make it their business to play at the best slot sites in the UK, so they're experts on free slots.
In this guide, we cover everything you need to know about playing free online slots. You'll find out about different game types, themes, bonus games, and the perks of playing for free.
If you're new to slot games, one of the best ways to play for free is by checking out free demo slots. These are basically trial versions of real money slots, and you can find many of them featured on this page.
This guide will also show you the ins and outs of playing free slots, including the UK gambling rules and where to find the best free mobile games. Keep reading to see why free slot games could be a top choice for any UK bettor.
What It Isn't
James Briscoe, Casinos.com slots expert, says:
It’s not a way to win money for free! Free slots are a great way to get familiar with casino games, but it’s not a way to win big jackpot prizes without spending a penny! You can play infinite demo rounds on these slots, but playing real money slots is the way to go if you want to win cash.
Play Free Demo Slots on Our Site
If you're a UK slot player, you can play free games by signing up at a licensed UK casino. Or you can check out a bunch of exciting free slots right here. We've broken down three ways you can find a specific slot game in our games library, which you can see above:
- By game title. Type in your favourite game title in the search box above. This is the most efficient way to find a specific slot game you’re looking for.
- Click on the “Sort” button. Use the button to pick progressive slots or to sort the list by release date or RTP. This way, you can see the newest releases first or find games with the biggest potential jackpots.
- Use the “Filter” function. This tool helps you select games by provider, features, volatility levels, or themes. Use it if you already know which features you would like to see in a slot but don’t have an exact game in mind.
Types of Free Online Slots
When it comes to playing free online slots, your options are many. UK casinos have almost as many free slots as real money games, including the latest and greatest releases from top software providers.
These games have all the excitement and none of the risk of real money games, which is why they’re such a hit with certain UK players. And of course, if you decide you want to try to win real money on slots, you'll already know which games you like best.
Here are some of the most popular free slot types:
Free Megaways Slots
Australian developer Big Time Gaming (BGT) was the first brand to release Megaways slots online. These games use a unique shape-shifting feature known as the Random Reel Modifier. The modifier produces a random number of symbols on every spin, resulting in thousands of paylines and huge maximum wins.
The mechanism first appeared in BGT’s 2016 slot Dragon Born, though it was Bonanza that really put Megaways on the map. Dozens of developers have since used the mechanic to up the ante on their own slots. This means you can find these games at pretty much any of our recommended online casinos.
Free Jackpot Slots
Real money jackpot slots allow players to score a massive prize with a single spin. Even more lucrative than regular jackpots are progressive jackpot slots. Here, the prize pool increases with every stake.
You can play demo versions of several jackpot slots at our recommended sites. Though free slots with progressive jackpots are a little harder to come across. Even so, trying out jackpot slots for free is a great way to weigh the risk before signing up at a casino. It's also a good way to see if depositing money via one of the casino payment solutions and playing with your cash is worth it.
Free Egyptian Slots
UK players can find free slots online in every shape, size, and theme imaginable. Yet, Egyptian slots are one of the earliest and most enduring slot themes to exist. These games remain popular with bettors in the UK and across the globe.
Free Cluster Pays Slots
Standard free demo slots contain a set number of winning paylines. But, games that use a Cluster Pays mechanism pay out anywhere on the grid. If you form clusters of the same symbol, you'll win and also bring in some extra fun and surprises to the game. Since NetEnt released Aloha! Cluster Pays in 2016, hundreds of games now use the same mechanism.
Free High Volatility Slot Machines
The volatility of a slot refers to the predictability of how each round will end. Each free demo slot you come across will have "high," "low," or “medium” volatility. High volatility slots have a lower win frequency but bigger prizes. Low volatility slots have a higher win frequency, but wins tend to be smaller.
Though free demo slots won’t pay out real money, it's a good opportunity to test some volatile games. Trying out demo slots will give you thrills without spending or losing money. And if you want to play for real later on, finding an attractive slots deposit bonus at Casinos.com is easy.
Free Penny Slot Machines
Free penny slots do exactly what they says on the tin. These games offer stakes as little as £0.01, making them perfect for budget betting. Though it seems impossible, you can play these games for even less than a penny by wagering on free slots in demo mode!
These games are a great way to dip your toes in the water if you're a beginner. Start by playing the demo version of these low-stakes games. Then transition to the real deal for a taste of real money wagering with minimal financial risk.
Play Free Mobile Slots
You can play slots on your iOS or Android device at all our recommended online casinos. Thanks to HTML5 technology, these games are responsive and adaptable. So, playing at a casino on a mobile is as good as on a desktop.
To begin, load your chosen free mobile slot on your mobile browser and voilà! You can now play some of the best free slot games anywhere, anytime.
Many online casinos also offer compatible casino apps for iOS and Android devices. The best online casino apps have a wealth of slot games to play, so they're well worth checking out. These apps keep you updated on the newest game releases and send you alerts if there are any new bonus offers.
In our experience, the following online casinos are some of the best:
Mobile Slot Games
2124
Mobile Slot Providers
109
Mobile Slot Games
2000
Mobile Slot Providers
60
Mobile Slot Games
1519
Mobile Slot Providers
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The Most Common Bonus Features in Free Slots UK
Now that you know the popular types of free slots in the UK, let’s quickly talk about their special bonus features. Each game has its unique mechanics, and you’ll find all the details on its pay table.
Below, we’ve briefly explained the most common free slot bonus features as an easy reference guide. Each one adds a new dimension to your play and, when combined, can create some memorable spins!
| Bonus Feature | Description | Slot to check out |
|---|---|---|
| Wilds | This nifty feature switches out other symbols to help you win, and it’s found in most free slots. Wilds can take many fun forms and become jumping, sticky, multiplier, or even walking wilds. | Starburst |
| Scatters | Scatters will typically help you to trigger in-game bonus rounds and features. In most free slots, if you get three scatters, you'll kick off a free spins bonus round. Landing more than three can get you even more free spins. | Book of Dead |
| Free Spins | Don't mix up free spins bonuses with free spins bonus rounds. In the UK, free spins bonus rounds are common in slots, but you must work hard to trigger them. Once you do, your bankroll isn’t used while the reels spin for more wins. | Immortal Romance |
| Respins | Think of respins as an extra chance at winning when one or more of the slot’s reels will spin again with no wager required. They're a popular slot feature, often letting you hold some reels while others spin, boosting your chances for a big payout. | 9 Masks of Fire |
| Win Multipliers | You can double, triple, or even quadruple your wins with the win multiplier feature. Usually, multipliers reset with every spin. But the real fun kicks in when they don't reset, and you can keep piling up your wins. | Fire Blaze: Blue Wizard |
| Hold & Win | The Hold and Win feature in slot games gives you a chance to lock in special symbols, like coins or jackpots, for bonus spins. It adds extra excitement by holding onto winning symbols and offering bigger potential rewards with each spin. | Wold Gold |
| Megaways | Megaways slots ditch the traditional fixed reel setup and offer dynamic reels that change the number of symbols with every spin. This gives you up to 117,649 ways to win on any spin, alongside cascading wins and expanding multipliers for added excitement. | Survivor Megaways |
| Tumbling Reels | This mechanic gives you extra win potential on every spin. Extra symbols tumble down to fill the gaps as winning symbol combinations disappear. You can land multiple wins and combinations from a single spin to boost the slot’s potential. | Bonanza |
| Gamble Feature | This double or quits mini-game is triggered after each winning spin. It’s typically represented by red and black card suits, where picking the correct option doubles your win from that spin. You can choose to collect or press on to greater potential rewards. | Eye of Horus |
| Jackpots | Jackpots in free slots can be either fixed amounts or progressive. Progressive jackpot slots add a percentage of every losing spin into a central prize pot that builds up until one lucky player scoops the lot. | Temple Tumble 2: Dream Drop |
| Bonus Wheel | The bonus wheel feature will offer you the chance to land a special prize separate from the main game. It’s usually triggered by landing a unique combination of symbols in a free slot game and rewarding you with free spins, bonus cash or more. | Divine Diamonds |
Top 5 Best Games From Our Demo Slots UK Library
If you’re feeling overwhelmed by the sheer selection of UK free slots available, then don’t worry, we’ve got your back. Our team of slot experts have handpicked their top five recommendations from our vast free slots library. Take any of these for a spin, and we promise you won’t regret it!
Immortal Romance
Immortal Romance from Microgaming is a vampire-themed slot game that gives you 243 ways to win on every spin. This gothic-themed hit title features the exciting Chamber of Spins bonus round with its free spins and multipliers. The above-average 96.86% RTP also helps to boost your win potential here.
Blood Suckers
It’s no coincidence that Blood Suckers has become one of the most-played slots of all time. With a record-high RTP of 98%, this vampire theme slot from NetEnt has a max win of 1,014x your stake. With thrilling bonus features, including wilds, free spins and more, it’s safe to say this slot doesn't suck!
Book of Dead
Join Rich Wilde in this Egyptian tomb-raiding slot from Play’n GO. With a steady RTP of 96.21%, this simple yet entertaining title is well known for its easily triggered free spins round. Landing three scatter symbols will unlock the slot’s true potential with possible wins of up to 5,000x your stake.
The Dog House Megaways
This pooch-themed offering from Pragmatic Play uses the popular Megaways mechanic to full effect. The dynamic grid in The Dog House Megaways will give you up to 117,649 ways to win on every spin. Plus, with up to 30 free spins in the Raining Wilds round, this title is the mutt’s nuts!
Big Bass Bonanza
Get your waders on and prepare to go fishing for some big wins in Big Bass Bonanza from Pragmatic Play. With a healthy 96.71% RTP and the possibility of 20 free spins for landing five scatters, this slot has more than enough to keep you hooked!
Most Popular Slot Themes
A good way to explore our free slots library is by picking a slot theme. Here are some popular topics you'll find at our top established sites and new casinos.
| Slot Theme | Details |
|---|---|
| Adventure Slots | Venture through exotic lands, unearth hidden treasures and embark on daring quests. Immersive adventure-themed slots have it all. |
| Fruit Slots | Harking back to the original fruit machines, these slots feature symbols like cherries, lemons, and lucky sevens. Fruit-themed slots will offer you superbly simple yet juicy gameplay. |
| Ancient Egypt Slots | Travel back in time to the land of the pharaohs to encounter Egyptian gods, pyramids, and hidden treasures in these mythical games. |
| Animal Slots | From giant jungle beasts to friendly farm animals, there’s bound to be a slot title based on your favourite animal. |
| Aztec Slots | Uncover sacred temples and golden treasures from an ancient civilisation in Aztec-themed slots. Go deep into a lost world with the encapsulating jungle setting. |
| Horror Slots | These slots offer you chills and thrills with their eerie graphics and suspenseful gameplay. Their horror-themed high jinks make them an ideal choice for horror fans everywhere. |
| Viking Slots | If fierce warriors, longships, and rewarding battles are your thing, storm into the world of Viking-themed slots! |
| Seasonal Slots | Celebrate all year long with slots based on popular holidays such as Christmas and Halloween. These slots feature all the symbols and bonuses to match the festival. |
| Fairytale slots | Encounter magical creatures, enchanted forests, and whimsical characters in fairytale-themed slots. Get magical rewards in these enchanting titles. |
| Pirate Slots | Shiver ye timbers with some swashbuckling adventure across dangerous seas in pirate-themed slots. Will you find the promised buried treasure? |
| Movies & TV Shows | Relive iconic moments and beloved characters from your favourite movies and TV shows with slots to match. |
Why Choose Free Slot Games?
Free slots come with numerous advantages that real money slot games can’t offer. Many UK punters play slots for the thrill. As such, free demo slots have always been a preferred way of playing for some players.
Explore Slot Features
Every slot has its own unique features, whether that’s free spins, progressive jackpots, expanding reels or all of the above. Many online video slots also come with an additional bonus round you can trigger by landing a specific combination of symbols. In contrast, others offer you the chance to gamble your winnings for double the payout. While these features all add a layer of intrigue to the normal gameplay, they may be a little confusing for beginners.
Playing free slots with free spins and bonus games is the quickest way to get to grips with these additional features. Once you feel confident with the mechanisms of a game, you can up the ante and start wagering with real money. That said, there’s no reason to risk your real money if you’re enjoying the games for free!
Compare The Best Free Slot Games Providers
We source our free slots from the best providers in the business. Studios like NetEnt and Microgaming often put an exclusive spin on their games to make them stand out.
When you play free slot games, you can check out cool features without having to bet real money. This means you can take your time getting to know a developer's style. With Wazdan slots, for example, you can adjust volatility and spin speed, or choose the 'big screen' mode.
You will also get to try different slots to understand better what works for you. With so many variations out there, it's always good to explore.
Play New Free Slots
Software providers regularly release new online slots in the UK to update their portfolios. By making the most of free slots, UK players can enjoy these new releases without investing real money. And of course, you don't have to only play these on your computer, since these mobile slots in the UK are generally released at the same time as on desktop.
If you like the game, you might want to place a real wager for a chance to win. Alternatively, you can continue to play these hot new slots for fun.
Pros and Cons of Playing Free Demo Slots
Pros
Get to know the game, testing exclusive features, bonus rounds and volatility.
Figure out which slots you like and dislike without eating into your bankroll.
Take more risks and figure out if they’re worth repeating with real-money spins.
Cons
You don’t get to withdraw your winnings as real money.
Some players find the risk of real money wagers the most exciting part of a game.
Free Slots Regulations in the UK
At Casinos.com, we only recommend casinos licensed by the UK Gambling Commission (UKGC) and other trusted authorities. To get a license, a casino has to follow UK-specific rules about keeping players safe and making sure the games are fair when people gamble online.
You might think if you're playing for free then why not opt for no account casinos. We'd never recommend this. These sites will be unlicensed, and potentially dangerous. Even if you want to try some demo slots, you'lll usually need to make an account when playing in the UK.
Anyone over 18 can gamble at an online casino for real money in the UK. However, these laws also apply to playing free slots, as underage players shouldn't be able to access online casino games of any kind. We use age verification software to ensure that only UK visitors of legal age can play demo games and sign up for online casino accounts.
Proof of Identity
All our recommended casinos ask every player to confirm their age and identity with documents like a passport or driver's licence. If these aren't presented, the casino can refuse to process your withdrawal request.
Some UK casino sites may even block your first deposit until you verify your account. That applies to any possible methods of paying and withdrawing at slot sites with PayPal, Neteller, Skrill, and similar casinos.
Once you prove your details, you can play slots or other games, such as online roulette for real money.
Responsible Gambling
All UK casino operators highlighted on this page are serious about problem gambling. They help you stay safe and in control.
These are some of the most effective tools best gambling sites with UK slots offer:
- Limits on the number of sessions you play
- Deposit amounts
- Your playing time
- Time-outs
- Self-exclusion
- Reality checks
- Advice and links to addiction support organisations.
Licensing Authorities & Testing Agencies
Meet The Author
17 Years
Experience
Experience
James began working in the online casino industry in Malta as a copywriter, before writing about casinos and esports betting for new sites and affiliate companies. He then wrote casino reviews for Gambling.com before joining Casinos.com full-time and has been part of the team since. James loves writing articles to help players like you.
Read Full BioFAQs
Where can I play free slot games for fun?
UK players can play free online slots for fun at any of our recommended UK online casinos. We’ve compiled a list of the very best sites for free slots, so choose any one of them to get started. Browse through their list of games and select a game you like the look of.
Do any free online slots pay real money?
No, you can’t win real money from playing free slot games. They are demo versions of real money games designed purely for entertainment purposes. However, you can claim slots free spins no deposit offers for the chance to turn your bonus spins into real money.
Can I play free slots on my mobile?
You can play virtually all the best slot games for free in demo mode. These include the classic Starburst, Book of Dead, and the Big Bass Bonanza slot series. Wolf Gold, Gates of Olympus, Gonzo's Quest, Fire Joker, Book of Ra, and Reactoonz are also great options.
Is it legal to play free online slots in the UK?
Playing slots for free is legal. Online casinos offer demo versions of real money games for players to try before placing real money wagers. However, you must be over 18 to play any type of online slots, even if they are free, so you must first verify that you are above the legal gambling age.
Are free slots really free?
Yes, many popular real money slots can be played for free in demo mode, plus you can find totally free slots to play online. Some slots are built to always be free and companies make money from them in other ways. You can often find free demo slots on the site of the game's creator.
What are the best free online slots?
You can play virtually all the best slot games for free in demo mode and these include the classic Starburst, plus Book of Dead, the Big Bass Bonanza series, Wolf Gold, Gates of Olympus, Gonzo's Quest, Fire Joker, Book of Ra, and Reactoonz.
What slot game is most likely to win?
Book of 99 is one of the best slots to play if you're simply looking to win, no matter the win size. It has a return to player percentage of 99%, which also helps give the game its name. Its 99% RTP means, statistically, for every £100 bet, you can expect to win £99 back, on average, over time.
Do you need to download free slots?
No, you don't need anything special to play free online slots - you can just stream the game there and then via the internet, on your mobile or desktop. Just find the game you want to play - after creating your casino account - or not, depending on the casino, and have fun!
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