Best Online Slot Sites

Last Updated: 25/11/2020
Discover the best online slots and the leading casino sites in the UK!
Casino ProviderBonus OfferReview
Temple Nile Casino
21

100% Welcome Bonus up to £500 + 30 Extra Spins

18+. New players only. 1 bonus offer per player. Min. deposit £20. Max bonus bet £5. Extra spins on selected games only- must be used within 72 hours. Bonus funds expire in 30 days, unused bonus shall be removed. Bonus funds are 100% match up to £500 + 30 extra spins on 1st deposit, 25% match up to £800 + 25 extra spins on 2nd deposit, and 50% match up to £200 + 50 extra spins on 3rd deposit. Bonus funds are separate to Cash funds, and are subject to 40x wagering the total bonus & cash. Only bonus funds count towards wagering contribution. Terms apply. BeGambleAware.org

Kaboo Casino
22

Enjoy 1000's of Slot Games at Kaboo Casino

18+ T&C Apply.

Mansion Casino
23

100% Welcome Bonus up to £200

New customers only. Minimum deposit £20, maximum bonus £200. Wager 40x before withdrawing. Game weighting applies. Max bonus betting limit – slots: £5, other games: 10% of bonus amount. T&Cs apply

Genting Casino
24

£400 Welcome Bonus

New Customers. Deposits between £20-£100 (max 4) wagered 35x (% game weightings apply) within 30 days on qualifying slot games will unlock cash bonuses of an equal amount.15 days to accept/opt into each bonus. Full T&Cs Apply

All British Casino
25

100% Welcome Bonus up to £100 + 10% Cashback

18+ Only Welcome Bonus for new players only | Max bonus is 100% up to £100 | No Max cash out | Wagering is 35x Bonus | Max bet while playing with a bonus is £5 | Cashback is cash with no restrictions | Bonus excluded for players that deposit with Skrill or Neteller | Full T & C's Apply | Begmbleaware.org

Slots Heaven Casino
26

100% Welcome Bonus up to £100 + 200 Extra Spins

New customers, Spins: 200 in total with 40 given on first deposit, winnings given as bonus funds, 20x wagering, spins and bonus wagering on Age of the Gods games only. Welcome bonus: £20 min deposit, max bonus £100, wagering 40x, game weighting applies. Betting limits: slots - £5, all other games - 10% bonus amount. T&Cs apply

No Bonus Casino
27

10% Cashback, No Strings Attached

10% Cashback, No Strings Attached! No Bonus Casino offers an unique service of 10% cash back to all our appreciated players. This ensures that you will not be down and out after you played through your last deposit.

MagicRed Casino
28

200% Welcome Bonus up to £500 + 100 Extra Spins

18+ New Players only. T&C's Apply. Gamble responsibly. www.begambleaware.org

mr.play Casino
29

100% Welcome Bonus up to £200 + 100 Extra Spins

18+ Applies to new depositing players. Min deposit £20. Wagering requirements apply 35x. 100 spins require 3 deposits. Full terms & conditions apply. Gamble responsibly. www.begambleaware.org

30

100% Welcome Bonus up to £200

18+ | New Customers Only | BeGambleAware.org | Full T&C's Apply

18+ only. Terms and conditions apply. Click Visit Site for more details

Guide to Finding the Best Slots Sites & Best Online Casinos in the UK 2021

UK slot players can find themselves overwhelmed by the sheer number of online casinos available to play at in 2021. New casino sites launch every week with quirky themes and brand new games, all competing to be the top dog with the biggest selection of slots. Yet being the biggest slots casino does not always mean being the best. So how do you find the best online casino in the UK? Here is your guide to the most popular online slot sites, based not just on the volume of games available, but also how these casino sites take care of their customers!

CasinoSlot GamesMobile SlotsSlot ProvidersVisit Site
1672 107 109 Visit Site
1386 100 103 Visit Site
1421 100 112 Visit Site

Top 10 Best Slot Sites of 2021

  1. Mr Play
  2. Johnny Jackpot
  3. PartyCasino
  4. BlackSpins
  5. All British Casino
  6. MrQ
  7. Royal Panda
  8. WinStar
  9. DreamVegas
  10. Casimba

Choosing an Online Slots Site 2021

Choosing which online slot sites to visit and sign up to can be a daunting task in this day and age. Over 30 new online casinos opened last year that were approved by the UK Gambling Commission. That's one every ten days and this growth of casino sites is set to continue well into 2021. So how do you choose which casino is best suited to you? Reading other players' experiences and reviews is a good place to start.

Many sites will have an average score, but it’s best to read the individual reviews to see what each person’s user experience has been. One player may be more aligned to your needs than another and this can help you identify what software the casino uses, how big the game selection is and how the bonuses work. Online slots casinos regularly add new games and amend their bonus structure, so it’s always best to try a casino first hand rather than solely relying on reviews. Most online casinos offer a demo mode so prospective new members can try before they buy.

CasinoExtra SpinsSlots WageringBonusVisit Site
120 35x Unlock up to £100 Cash & 20 Wager-Free Spins Visit Site FullT&Cs apply. Extra spins - no deposit required & new players only. Claim within 3 days of registration & 3 day expiry. Extra spins worth £0.10 each on Book of Dead, winnings paid as cash. Deposit offers available across any two deposits. Both expire 7 days after registration & have 7 days to wager once claimed. Deposit £10, £25 or £50+ & wager 35x for a cash reward. Only cash stakes qualify & wagering contributions vary. 5 extra spins on Book of Dead with each qualifying deposit, 3 day expiry.18+ BeGambleAware.org.
100 35x 100% Welcome Bonus up to £300 + 100 Zee Spins + 500 Zee Points Visit Site 18+. New players only. Valid for 15 days after 1st deposit. Min Deposit £20 Max Bonus Bet £5 Winnings from spins capped at £50 First 100 Zee spins: 10/day. Spins must be used within 24 hours, Funds within 30 days. Bonus funds are separate to Cash funds, and are subject to 35 wagering (bonus + cash). 18+. T&Cs apply. BeGambleAware.org
50 35x 100% Welcome Bonus up to £500 + 50 Bonus Spins Visit Site 18+. New players only. 1 bonus offer per player. Min. deposit £20. Max. bonus bet is £5. Bonus spins on selected games only and must be used within 72 hours. Bonus funds expire in 30 days, unused bonus funds will be removed. Bonus funds are 100% match up to £500 on your 1st deposit, 25% match up to £1000 on your 2nd deposit, and 50% match up to £500 on your 3rd deposit. Bonus funds are separate to Cash funds, and are subject to 35x wagering the total bonus & cash. Only bonus funds count towards wagering contribution. Terms apply. BeGambleAware.org

Understanding Slot Sites Reviews

Online casino reviews are normally based on a number of different criteria, including user experience, what software runs the site, security and customer support, and, most importantly, bonuses and promotions. There are specific slot sites reviews that will offer more detail about what games are available, on what platforms and how the bonuses are tied specifically to online slots. Some reviews may give a score out of ten, while most offer a summary that highlights the pros and cons of each casino.

Why User Experience is Important

One of the most important aspects of online slot sites is its user experience. This is essentially how easy it is use, with the usability often determined by how simple the site navigation is. Many casinos offer different sections and categories within their slot sites section, so it'a crucial that players are able to move freely between different areas and effortlessly switch from one game to another. In this modern age of mobile devices, user experience and usability can also look at how easy it is to cross from one platform for another, in the hope that this will be a fluid, seamless experience that's the same whether on a computer, tablet or smart phone.

Evaluating Game Selection

Reviews of casino slot sites will often have a large section devoted to the slot game selection of that specific website. They normally follow key guide points that help determine whether a player will choose to visit that casino. Questions asked may include how many games are on offer, what type of games, what game developers are providing them and whether they can be played for free. The number of games on offer at online casinos can vary wildly, from a handful to several hundred.

The number of titles on offer is usually tied to whether that casino has an exclusive deal with one specific software provider, so it only uses their games, or whether it hosts slots from several slot suppliers. There are dozens of iGaming designers and some players may have a favourite one, in which case finding a casino exclusive to that developer might be preferred. Others may wish to sample the best of all designers, so they should find one with an all-encompassing list of providers.

The types of slot games on offer will be broken into several categories, from progressive jackpots and classic fruit slots to the latest 3D video slots, or VR slots using VR headsets to play. Many casinos break these categories down, so players can check how many of each type they offer. The best way to evaluate a game is to try it for free. To check whether a game can be played for free, visit an online casino and click on a game. Most casinos will offer two options, play for money or play for fun. Some online casinos might need you to become a member even if you are just playing for free, while others may not offer this option at all.

CasinoAll Casino GamesSlotsLive GamesBonusVisit Site
2000 1672 18 100% Welcome Bonus up to £300 + 100 Zee Spins + 500 Zee Points Visit Site 18+. New players only. Valid for 15 days after 1st deposit. Min Deposit £20 Max Bonus Bet £5 Winnings from spins capped at £50 First 100 Zee spins: 10/day. Spins must be used within 24 hours, Funds within 30 days. Bonus funds are separate to Cash funds, and are subject to 35 wagering (bonus + cash). 18+. T&Cs apply. BeGambleAware.org
1666 1510 112 Get up to 50 Free Spins on your First Deposit Visit Site 18+ Only | | 50 Extra Spins on Book of Dead | Min. deposit is £10. This offer is only available for first time depositors | Also after your First Deposit you may claim an additional 30 Extra Spins by visiting the Kicker Section | Game: Book of Dead | Spin Value: £0.10 | OJO’s Rewards and Game Play policy applies | T&C's Apply
1535 1445 74 120 Free Spins on Starburst Visit Site 18+. New depositors only. UK residents only. Minimum deposit £10. Extra Spins are valid only on Starburst and expire in 7 days. 10x wagering apply. Certain deposit types are exlcuded. Gamble responsibly. www.begambleaware.org

The Safety and Security of Slots Websites

Players should feel confident when sending money or personal data to an online casino that this information and data is safe and secure. In order to obtain a UKGC license, online casinos must ensure that their security is above reproach. Casinos are aware that this can be a key factor as to whether someone joins their website and often list the type of encryption technology and software used in its FAQ section under security. Most casinos use a standard Secure Socket Layer (SSL) encryption link between the server and browser, ensuring all transmitted data is protected. These SSL links usually come in 128-bit or 256-bit encryption, and both types are well suited to protect your flow of money and information.

Why Do Most Online Casino Sites Offer so Many Slots?

Variety is the spice of life and most online casino sites offer a vast range of slots to cater to the widest audience possible. Some players may enjoy games based around different themes, or designed by specific software providers, so it's important that online casinos can try and satisfy all of its members. At the same time, online casinos add to its existing catalogue every week to keep the casino updated with fresh new titles so it can entice new players with the most recent releases.

Can You Download Slots Sites?

In this day and age of instant play, where players can seamlessly switch from playing on their desktop browser to a mobile one, many slot sites do not see the need to offer a download of their casino. The browser-based experience means casino members are not restricted to the device that a download would need to be installed on, which was often the case when internet casinos first appeared. However, a small number of casinos still offer apps for both desktop computers and mobile devices like smart phones and tablets, allowing players to play offline.

CasinoMobile SlotsMobile Slots ProvidersExtra SpinsSlots WageringVisit Site
1672 107 100 35x Visit Site
1421 100 50 35x Visit Site
1386 100 50 35x Visit Site

What Slots Sites Have the Highest Payout Rates?

A return-to-player (RTP) value of a specific game is a payout percentage based on how often a player is likely to win. Higher casino payout rates mean that players are more likely to celebrate winnings from these slots, with the most generous ones offering a rate of 95% or above. The RTP is usually determined both by the software developer of the game, and the casino hosting it. Here is a list of the best UK casinos offering the highest RTP in 2021:

  • Thrills Casino = 98% RTP
  • Mr Green Casino = 97.38% RTP
  • Kaboo Casino = 97.30% RTP
  • 888 Casino = 96.85% RTP
  • Dunder Casino = 96.45% RTP

Gamble Responsibly with Online Slots Sites

At the end of the day, everyone wants to have fun and win some money when playing at online slot sites. However, it is important that players are aware of how to gamble responsibly. Casinos help players regulate their gambling using a number of tools. The first is that all slot sites have betting limits on their games, so each spin has a ceiling on the maximum bet. Online casinos also stipulate maximum deposits, which determines the amount players can pay into their account on any given day. Many slot sites also offer self-regulation, giving players the option to impose lower limits on themselves.

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