Best Online Slot Sites

Updated: 12.05.2025

Try removing some of your filters to find more slot games, or reset all

Join today to claim our exclusive sign up bonuses!

Get all the latest slots bonuses, reviews and more.

All casinos are:

Licenced & Verified

Expertly Reviewed

№	Rating	Bonus
1	Mr Play	Up to £200 + 100 Free Spins 3-part bonus + 100 FS, 35× WR, min deposit £10	Play now 18+ New Players Only
2	Jackpot City	Up to €1,000 + 20 Free Spins 100% match on first 4 deposits, 25–30× WR	Play now 18+ New Players Only
3	LeoVegas	100% up to €1,000 + 100 Free Spins Min deposit €10, FS on Gates of Olympus, std. WR	Play now 18+ New Players Only
4	PlayOJO	50 Free Spins – No Wagering Deposit £10, wins paid cash, FS on Big Bass Bonanza	Play now 18+ New Players Only
5	888 Casino	200% up to £200 + FS offers 120% alt. offer, FS vary, 30× WR, time-limited deals	Play now 18+ New Players Only

Guide to Finding the Best Slots Sites & Best Online Casinos in the UK 2025

In 2025, you may find yourself overwhelmed by the sheer number of online slots sites available to play. New slot platforms are launched every week with themes and completely new games, all vying to become the top choice with the largest selection of slots. Often, the biggest slots casino doesn't always mean it's the finest. Sometimes you need a break. So how does one discover the finest online casino in the UK? Here is your guide to the top online slot sites, based not just on the game quantity available, but also on how these casino sites treat their clients!

Slot Games	Mobile Slots	Slot Providers	Mobile Slot Games X	Visit Site
1672	107	109	1672	Visit Site	18+. New players only. min deposit £20. Max bonus £5. Winnings from spins capped at £50. 100 Zee Spins valid on Starburst (first 10 credited immediately upon first deposit; rest credited at 07:00 GMT at 10/days). Spins must be used by 23.59 GMT of the day on which they are credited to player account, any unused shall be removed. Bonus funds must be used within 30 days. Bonus funds are separate to cash funds, and subject to 35x wagering (bonus + cash). Full terms apply. BeGambleAware.org
1386	100	103	1386	Visit Site	18+. New players only. Min deposit £20. Max bonus bet £5. Bonus spins on selected game only and must be used within 72hrs. Winnings from Bonus spins credited as bonus funds and capped at £100. Bonus funds expire within 30 days. Offer is 100% bonus match up to £200 + 50 Bonus spins on your 1st deposit, and 50% bonus match up to £50 on your 2nd deposit. Bonus funds are separate to cash funds & subject to wagering requirement (35x deposit + bonus). Only bonus funds contribute towards wagering requirement. Affordability checks apply. Terms apply. Please gamble responsibly. BeGambleAware.org
1421	100	112	1421	Visit Site	18+. New players only. One offer per player. Max bonus bet £5. Offer: 100% bonus match on 1st deposit + bonus spins. Value of bonus & number of spins depend on deposit amount: £20-£99: max £100 bonus + 50 spins on selected games; £100-£200: max £200 bonus + 100 spins on selected games; or £200+: max £300 bonus + 150 spins on eligible NetEnt Games. Winnings from spins credited as bonus and capped at £100. Bonus funds are separate to cash funds & subject to wagering requirement (35x deposit + bonus). Only bonus funds contribute to wagering requirement. Bonus funds expire within 30 days; bonus spins within 72hrs. Affordability checks apply. Terms Apply. Please gamble responsibly. BeGambleAware.org.

Choosing an Online Slots Site 2025

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 2025. 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.

All Casino Games X	Mobile Slot Games X	Free Spins	Visit Site
2700	2028	120	Visit Site	18+ \| Play Responsibly \| BeGambleAware.org \| T&Cs apply. New reg only. Claim 10 extra spins x10p each on Starburst (no deposit needed) within 3 days. Opt in & deposit £10, £25 or £50 within 7 days & further 7 days to wager cash stakes 35x to unlock reward (£50 on 2 deposits). 3 day exp. Wagering/game contributions vary. 10 wager-extra spins x10p to added to Starburst with each qualifying deposit, 3 day expiry. 18+ BeGambleAware.org. \| Terms and conditions applies
2000	1672	100	Visit Site	18+. New players only. min deposit £20. Max bonus £5. Winnings from spins capped at £50. 100 Zee Spins valid on Starburst (first 10 credited immediately upon first deposit; rest credited at 07:00 GMT at 10/days). Spins must be used by 23.59 GMT of the day on which they are credited to player account, any unused shall be removed. Bonus funds must be used within 30 days. Bonus funds are separate to cash funds, and subject to 35x wagering (bonus + cash). Full terms apply. BeGambleAware.org
1354	1386	50	Visit Site	18+. New players only. Min deposit £20. Max bonus bet £5. Bonus spins on selected game only and must be used within 72hrs. Winnings from Bonus spins credited as bonus funds and capped at £100. Bonus funds expire within 30 days. Offer is 100% bonus match up to £200 + 50 Bonus spins on your 1st deposit, and 50% bonus match up to £50 on your 2nd deposit. Bonus funds are separate to cash funds & subject to wagering requirement (35x deposit + bonus). Only bonus funds contribute towards wagering requirement. Affordability checks apply. Terms apply. Please gamble responsibly. 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, slots bonuses. 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 the slot games 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.

All Casino Games	Slots	Live Games	Avg Min Dep Casino	Visit Site
1094	1023	33	10	Visit Site	New Customers only; Min. deposit £15 (no Skrill/Neteller); Wager bonus 40x within 15 days; Max winnings = 10x bonus; Extra spins validity: 7 days; Extra spins max. winnings = £100. Stake contribution as per eligible games; See full terms; Terms apply; 18+
1293	1176	44	10	Visit Site	Welcome bonus for new players only \| Maximum bonus is 100% up to £100 \| Min. deposit is £20 \| No max cash out \| Wagering is 35x bonus \| Maximum bet with an active bonus is £5 \| Eligibility is restricted for suspected abuse \| Cashback is cash with no restrictions \| Skrill & Neteller deposits excluded \| Cashback applies to deposits where no bonus is included \| T&C's apply
659	640	19	20	Visit Site	Deposit min. £10. Max. bonus £100. 20x wagering (game weighting, table coverage and max. bet rules apply) on deposit and bonus to make the bonus balance withdrawable. Time limits and T&Cs apply.

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.

Mobile Slots	Mobile Slots Providers	Visit Site
1672	107	Visit Site	18+. New players only. min deposit £20. Max bonus £5. Winnings from spins capped at £50. 100 Zee Spins valid on Starburst (first 10 credited immediately upon first deposit; rest credited at 07:00 GMT at 10/days). Spins must be used by 23.59 GMT of the day on which they are credited to player account, any unused shall be removed. Bonus funds must be used within 30 days. Bonus funds are separate to cash funds, and subject to 35x wagering (bonus + cash). Full terms apply. BeGambleAware.org
1421	100	Visit Site	18+. New players only. One offer per player. Max bonus bet £5. Offer: 100% bonus match on 1st deposit + bonus spins. Value of bonus & number of spins depend on deposit amount: £20-£99: max £100 bonus + 50 spins on selected games; £100-£200: max £200 bonus + 100 spins on selected games; or £200+: max £300 bonus + 150 spins on eligible NetEnt Games. Winnings from spins credited as bonus and capped at £100. Bonus funds are separate to cash funds & subject to wagering requirement (35x deposit + bonus). Only bonus funds contribute to wagering requirement. Bonus funds expire within 30 days; bonus spins within 72hrs. Affordability checks apply. Terms Apply. Please gamble responsibly. BeGambleAware.org.
1386	100	Visit Site	18+. New players only. Min deposit £20. Max bonus bet £5. Bonus spins on selected game only and must be used within 72hrs. Winnings from Bonus spins credited as bonus funds and capped at £100. Bonus funds expire within 30 days. Offer is 100% bonus match up to £200 + 50 Bonus spins on your 1st deposit, and 50% bonus match up to £50 on your 2nd deposit. Bonus funds are separate to cash funds & subject to wagering requirement (35x deposit + bonus). Only bonus funds contribute towards wagering requirement. Affordability checks apply. Terms apply. Please gamble responsibly. BeGambleAware.org

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 2025:

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.

Visa

PayPal

NETELLER

Skrill

Boku

Maestro

Paysafecard

Zimpler

MasterCard

Visa Electron

2025