Online Casino
Maximum
Bonus
1. Deposit
max. Bonus
Percentage
Software
Number of Free Spins
No Deposit Bonus
Rating
Join
Online Casino
Maximum
Bonus
1.500£
1. Deposit
max. Bonus
100£
Percentage
100%
Software
Playtech, NextGen, WMS, Blueprint, Cryptologic
Number of Free Spins
No Deposit Bonus
888£
Rating
9.5
Online Casino
Maximum
Bonus
500€
1. Deposit
max. Bonus
500€
Percentage
100%
Software
Novoline, NetEnt
Number of Free Spins
20
No Deposit Bonus
Rating
9.4
Online Casino
Maximum
Bonus
100£
1. Deposit
max. Bonus
100£
Percentage
100%
Software
NetEnt, Merkur
Number of Free Spins
50
No Deposit Bonus
Rating
9.3
Online Casino
Maximum
Bonus
100£
1. Deposit
max. Bonus
100£
Percentage
100%
Software
Betsoft, Microgaming, NetEnt, Merkur, Yggdrasil
Number of Free Spins
20
No Deposit Bonus
Rating
9.2
Online Casino
Maximum
Bonus
100£
1. Deposit
max. Bonus
100£
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100%
Software
Playtech, Microgaming, Yggdrasil
Number of Free Spins
No Deposit Bonus
Rating
9.1
Online Casino
Maximum
Bonus
1.500£
1. Deposit
max. Bonus
100£
Percentage
200%
Software
Betsoft, Cryptologic, Evolution, Microgaming, NetEnt
Number of Free Spins
20
No Deposit Bonus
Rating
9.0
Online Casino
Maximum
Bonus
200£
1. Deposit
max. Bonus
200£
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100%
Software
IGT, Amaya, Microgaming, NetEnt
Number of Free Spins
30
No Deposit Bonus
Rating
8.9
Online Casino
Maximum
Bonus
200£
1. Deposit
max. Bonus
200£
Percentage
100%
Software
NetEnt
Number of Free Spins
77
No Deposit Bonus
Rating
8.9
Online Casino
Maximum
Bonus
500£
1. Deposit
max. Bonus
200£
Percentage
100%
Software
Merkur, NetEnt, IGT, WMS
Number of Free Spins
120
No Deposit Bonus
Rating
8.9
Online Casino
Maximum
Bonus
1.000£
1. Deposit
max. Bonus
200£
Percentage
100%
Software
Microgaming, NetEnt, Play N Go, Evolution, Nyx
Number of Free Spins
No Deposit Bonus
Rating
8.9
Online Casino
Maximum
Bonus
1.000£
1. Deposit
max. Bonus
200£
Percentage
100%
Software
Microgaming, NetEnt, Play N Go
Number of Free Spins
200
No Deposit Bonus
Rating
8.9
Online Casino
Maximum
Bonus
1. Deposit
max. Bonus
No Bonus
Percentage
Software
Microgaming, NetEnt, Merkur, Bally Wulff, Play N Go, Yggdrasil
Number of Free Spins
20
No Deposit Bonus
Rating
8.8
Online Casino
Maximum
Bonus
100£
1. Deposit
max. Bonus
100£
Percentage
100%
Software
Playtech
Number of Free Spins
25
No Deposit Bonus
Rating
8.8
Online Casino
Maximum
Bonus
100£
1. Deposit
max. Bonus
100£
Percentage
100%
Software
Microgaming, NetEnt, Sheriff Gaming
Number of Free Spins
No Deposit Bonus
Rating
8.8
Online Casino
Maximum
Bonus
600£
1. Deposit
max. Bonus
300£
Percentage
200%
Software
NetEnt, Playtech
Number of Free Spins
99
No Deposit Bonus
30£
Rating
8.8
Online Casino
Maximum
Bonus
500£
1. Deposit
max. Bonus
50£
Percentage
100%
Software
NetEnt
Number of Free Spins
100
No Deposit Bonus
Rating
8.8
Online Casino
Maximum
Bonus
1.000£
1. Deposit
max. Bonus
250£
Percentage
100%
Software
Microgaming
Number of Free Spins
10
No Deposit Bonus
Rating
8.8
Online Casino
Maximum
Bonus
900€
1. Deposit
max. Bonus
900€
Percentage
300%
Software
Betsoft, Gamescale, NextGen Gaming
Number of Free Spins
No Deposit Bonus
Rating
8.8
Online Casino
Maximum
Bonus
100£
1. Deposit
max. Bonus
100£
Percentage
200%
Software
Microgaming, NetEnt, IGT
Number of Free Spins
50
No Deposit Bonus
Rating
8.7
Online Casino
Maximum
Bonus
1 FS for every £1
1. Deposit
max. Bonus
1 FS for every £1
Percentage
Software
NetEnt, Microgaming, Amaya, Merkur
Number of Free Spins
50
No Deposit Bonus
Rating
8.7
Online Casino
Maximum
Bonus
200£
1. Deposit
max. Bonus
100£
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100%
Software
IGT, NetEnt, Microgaming, NextGen, Eyecon
Number of Free Spins
No Deposit Bonus
10£
Rating
8.5
Online Casino
Maximum
Bonus
900€
1. Deposit
max. Bonus
300€
Percentage
100%
Software
IGT, Microgaming, NetEnt, Play N Go, Yggdrasil
Number of Free Spins
10
No Deposit Bonus
Rating
8.5
Online Casino
Maximum
Bonus
200£
1. Deposit
max. Bonus
200£
Percentage
200%
Software
Microgaming, NetEnt, WMS, Quickfire, Thunderkick
Number of Free Spins
10
No Deposit Bonus
Rating
8.4
Online Casino
Maximum
Bonus
50£
1. Deposit
max. Bonus
50£
Percentage
500%
Software
Playtech
Number of Free Spins
No Deposit Bonus
Rating
8.4
Online Casino
Maximum
Bonus
210£
1. Deposit
max. Bonus
200£
Percentage
100%
Software
Play N Go, NetEnt, Yggdrasil, Microgaming
Number of Free Spins
11
No Deposit Bonus
Rating
8.4
Online Casino
Maximum
Bonus
500£
1. Deposit
max. Bonus
500£
Percentage
100%
Software
Playtech, Microgaming, IGT
Number of Free Spins
No Deposit Bonus
Rating
8.4
Online Casino
Maximum
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150£
1. Deposit
max. Bonus
150£
Percentage
100%
Software
Playtech
Number of Free Spins
10
No Deposit Bonus
10£
Rating
8.4
Online Casino
Maximum
Bonus
1.000£
1. Deposit
max. Bonus
250£
Percentage
100%
Software
Microgaming
Number of Free Spins
25
No Deposit Bonus
10£
Rating
8.4
Online Casino
Maximum
Bonus
1.500£
1. Deposit
max. Bonus
1.500£
Percentage
150%
Software
Nicrogaming, NetEnt, NYX
Number of Free Spins
50
No Deposit Bonus
Rating
8.8
Online Casino
Maximum
Bonus
500£
1. Deposit
max. Bonus
100£
Percentage
100%
Software
NetEnt
Number of Free Spins
100
No Deposit Bonus
Rating
8.4
Online Casino
Maximum
Bonus
50€
1. Deposit
max. Bonus
50€
Percentage
100%
Software
NetEnt, Microgaming, NYX, Play N Go
Number of Free Spins
No Deposit Bonus
Rating
8.4
Online Casino
Maximum
Bonus
200£
1. Deposit
max. Bonus
200£
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200%
Software
NetEnt, Amaya Gaming, Cryptologic, IGT, Microgaming
Number of Free Spins
No Deposit Bonus
Rating
8.2
Online Casino
Maximum
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700£
1. Deposit
max. Bonus
100£
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100%
Software
Playtech
Number of Free Spins
25
No Deposit Bonus
Rating
8.3
Online Casino
Maximum
Bonus
100£
1. Deposit
max. Bonus
100£
Percentage
100%
Software
Playtech
Number of Free Spins
30
No Deposit Bonus
Rating
8.2
Online Casino
Maximum
Bonus
200€
1. Deposit
max. Bonus
200€
Percentage
100%
Software
NetEnt, Amaya Gaming
Number of Free Spins
100
No Deposit Bonus
Rating
8.1
Online Casino
Maximum
Bonus
600£
1. Deposit
max. Bonus
125£
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125%
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Microgaming, NetEnt, Play N Go, NYX
Number of Free Spins
No Deposit Bonus
Rating
8.1
Online Casino
Maximum
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100£
1. Deposit
max. Bonus
100£
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100%
Software
NetEnt, NextGen, IGT, BetSoft, Microgaming, WMS
Number of Free Spins
No Deposit Bonus
Rating
8.1
Online Casino
Maximum
Bonus
200£
1. Deposit
max. Bonus
100£
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100%
Software
NetEnt, Microgaming
Number of Free Spins
10
No Deposit Bonus
Rating
8.0
Online Casino
Maximum
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500€
1. Deposit
max. Bonus
500€
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100%
Software
NetEnt
Number of Free Spins
No Deposit Bonus
Rating
8.0
Online Casino
Maximum
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1000£
1. Deposit
max. Bonus
1000£
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200%
Software
Amaya, Novoline
Number of Free Spins
No Deposit Bonus
10£
Rating
8.0
Online Casino
Maximum
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300€
1. Deposit
max. Bonus
300€
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300%
Software
Net Entertainment , Playtech , GamesOS , Microgaming
Number of Free Spins
50
No Deposit Bonus
Rating
8.7
Online Casino
Maximum
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777€
1. Deposit
max. Bonus
777€
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100%
Software
Novoline
Number of Free Spins
No Deposit Bonus
Rating
7.9
Online Casino
Maximum
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160£
1. Deposit
max. Bonus
160£
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160%
Software
Microgaming
Number of Free Spins
No Deposit Bonus
Rating
7.9
Online Casino
Maximum
Bonus
2.000€
1. Deposit
max. Bonus
1.000€
Percentage
150%
Software
Microgaming, Quickfire
Number of Free Spins
No Deposit Bonus
Rating
7.8
Online Casino
Maximum
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20£
1. Deposit
max. Bonus
20£
Percentage
100%
Software
CryptoLogic, Electrade, IGT / Wagerworks, Novomatic
Number of Free Spins
No Deposit Bonus
20£
Rating
7.8

What Makes a Good Slot Machine?

No matter how well-stocked you are on free spins and cash bonuses, there’s no point playing to win if you don’t understand the basic rules of online slots. Every spin of the reels is a game of chance, and no matter how many times you’ve wagered, each and every outcome is a random one. Therefore, it’s possible first-time players could win the jackpot if their wager is high enough.

Just because a slot game looks like great value on the surface, doesn’t mean it is. Free spins and bonus rounds might be plentiful, but the overall return to players and potential returns might be small. Poor returns in base games can make some slots a long haul investment just to see some sizable so win, so always check the individual return to player (or RTP percentage) of slots before committing to any significant play.

The best slots come in two distinct categories. The first one are simple 5-reelers designed to cater to players of all types, from the complete novice, to the seasoned professional who’s been playing for years. Slots aren’t a game of skill as such, but getting to up speed on the ins and outs of each title and their unique bonus rounds is essential. More seasoned players can opt for advanced rules with more interactive titles, where they’ve the choice of multiple bonus options, each with their own unique perks and drawbacks. Getting a basic grasp of gaming strategy is essential, but incredibly lucrative if you’re invested in long-term play.

Where to Play Online Slot Machines for Free

If you’re happy to play for practice, you’ll get full access to most gaming features of online slots at any reputable online UK casino. Play in practice mode with popular titles from gaming developers like NetEnt, Playtech and Microgaming. Once you’ve polished up on the slot game specs, you can play for real with no investment if you take advantage of new member bonuses and welcome perks when you sign up to many leading online casinos. Get around your bonus restrictions by signing up for multiple welcome bonuses at different casinos to continue to play for free.

What Are the Best Welcome Bonuses out There for New Players?

If you’re new to the world of online casinos, you’ll be surprised at just how many places will seem to want to give you something for nothing. It is possible to play for free at many casinos, but more often than not, players are going to find any ‘free bonus’ ultimately has to pay for itself with extensive wagering requirements. Don’t be surprised if you have to bet 20-30x your initial stake just to release your winnings, and almost always expect to be asked to make at least one actual cash deposit before any winnings you earn on slots can make it into to your pocket.

No-deposit bonuses are ultimately the cheapest way to play for cash at online casinos, although wagering limits and relatively small starting stakes might appeal to small-time wagerers and novices only. High rollers looking to make more money, quicker, can find much more lucrative sign up bonuses out there, with upwards of £1000 matched deposit welcome gifts, and free spins in the hundreds. You’ll find no deposit bonuses at hundreds of UK Casinos, with £20 no-deposit bonuses for new customers at sites like Mr Green Casino and Betfair. Spin Genie and Pocket Fruity are great go-to’s for an easy 25 free spins, with an extensive collection of popular slots and classic instant win games.

You’ll always get the best returns when you stake at least some money down as a deposit. Make the most most of matched bonuses with lucrative offers of up to 400% returns. Almost every casino rewards new members with a cash credit bonus they can use to play with online slots, instant wins and other casino games, and these usually have laxer wagering restrictions than no-deposit schemes. For serious high rollers, there’s great VIP only rewards at BGO Casino. Players can earn up to £1000 when they join, with 200 free spins to use on online slots and instant wins.

The 10 Best Online Slot Machines in the UK

With hundreds of tried, tested and trusted to choose from in the UK alone, you’ve got plenty of choice when it comes to online slot titles. Choose from thousands of essential games from popular software developers like Microgaming, Novomatic and IGT. You’ll find classic 5-reel slots with lemons, bells and bars, alongside dynamic video slots inspired by the movies, small screen and comic books. Whether you’re new to slots or just looking for a new favourite, we’ve assembled a 10 of the best you can play today at popular UK casinos.

Thunderstruck II – If you’re after big wins, the Thunderstruck series is a must. With 243 paylines and flexible wagering, there’s serious potential to win big and away with life changing winnings with this Nordic-inspired 5-reeler.

X-Men – villains and heroes assemble in this essential 5-reeler from Playtech. With 25 paylines and dynamic bonus round rewards, there’s plenty of chances to earn free spins and multiply your winnings for sky-high jackpots.

Quest for Immortality – This NetEnt online slot has 720 different paylines, with extra bonus rounds and multipliers that can amount to jackpot level winnings. You can play this, or any title from the Pyramid series cross-platform at any mobile game casino.

Mega Fortune – another NetEnt title, this 5-reel slot is packed with free spins and huge multipliers to help elevate even smaller stakes into the stratosphere. A must for high rollers, this game has plenty of paylines to help turn max bets into mega fortunes.

Iron Man 3 – join the founding Avenger and his team of super-powered friends and foes in this 5-reel comic inspired slot from Playtech. Earn extra money with the Marvel Progressive Bonus, available on all superhero slots from the series.

Game of Thrones – Fans of the books will love this video slot from Microgaming, offering a unique online slot experience, enriched with dynamic graphics and video clips from the smash hit HBO show itself. There’s free spins and multipliers on offer, as well as several exclusive bonus rounds for bigger wins and a more immersive story.

Millionaire Genie – This online slot offers progressive jackpots ones, making it an essential for high rollers looking to chase life changing jackpots. Flexible wagering and lucrative bonus rounds make this a must for every player.

Dazzle Me – This colourful slot from NetEnt comes packed with gems and winning symbols, with 72 different paylines allowing for some seriously lucrative jackpot potential for those willing to wager big.

The Avengers – Avengers assemble in this Marvel slot from Playtech. Trigger character bonus rounds for free spins, multipliers and more chances to win big. Land three of the same heroes on the reels to launch the lucrative bonus round, with different bonuses rewarded for Hulk, Iron Man, Thor and Captain America.

Wheel of Fortune – Fans of the TV games how classic will love the chance to spin to win with Wheel of Fortune: Triple Extreme. Land paylines on the reel to trigger spins on the famous wheel, and land impressive cash prizes and extra spins from the wedges.

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