Best Online Slots Sites in the UK for 2025

Slot games are arguably the most popular casino games around. These games typically feature a virtual slot machine with reels and symbols, where players can wager real money to spin the reels in the hopes of landing winning combinations. Online slot games come in a variety of themes, from classic fruit machines to modern video slots with intricate animations and bonus features. More often than not, online slots will be the most abundant type of game that an online casino will have in its library. They are easily accessible from any device with an internet connection, making them a convenient and entertaining option for those looking to try their luck and potentially win some cash prizes.

Since launching in 2011, Videoslots has amassed one of the largest game libraries in the online casino industry. Online slot games make up a vast majority of that collection, so slot fans are in for a treat.

With more than 6,200 slots on offer, Videoslots’ game offering can’t be beaten. When I also factored in the 11 wager-free spins, an enticing welcome offer, and 35x wagering requirements for all non-jackpot slots, and it’s easy to see why Videoslots comes out on top for me.

Another casino with a massive library, Mr Vegas has made a remarkable impression since its 2020 launch. When it comes to online slot games, Mr Vegas is one of the best casinos around.

Having almost 5,500 slot games to offer is absolutely amazing by any standard. The best part for me is that Mr Vegas offers an extensive selection of more than 500 fixed, progressive or daily jackpot slot games to choose from! As a lover of jackpot slots, it was hard for me to not get excited.

Pokerstars is an exemplary online casino, and one of the leaders in the industry. As well as having a world-class live casino and table game offering, Pokerstars also has an outstanding slot game offering.

I was impressed with every aspect of Pokerstars’ slots offering. The game total is outstanding, containing some Pokerstars-exclusive slots. Receiving 250 free spins is incredibly generous, and they can be used on a wide range of slots!

Playzee has consistently been a CasinoRange favourite since it debuted in 2018. The White Hat Gaming outfit has a stacked roster of online slots for players to sink their teeth into.

I feel that Playzee have struck a great balance between their slots offering and their welcome offer. The game selection is incredibly solid, reaching close to the 2,000 mark, while I found 100 free spins to be incredibly generous. The only drawback is that the free spins have to be used on Starburst only, even if that is one of my favourite slot games!

Jackpot Village has been a top online casino since 2019. Boasting a stellar reputation and an amazing selection of games, Jackpot Village brings a lot to the slots table.

Jackpot Village is another casino with an impressive library of slots, breaking the 2,000 barrier. I was struck by Jackpot Village’s sheer dedication to slots; there are 2,269 slot games compared to 57 live casino games and 67 table games - slots are clearly the priority!

One of the most trusted brands you’ll come across, Grosvenor Casinos’ land-based experience has translated well to the world of online casinos - especially the world of online slots.

Although other casinos on this list have higher game counts (894 slots is still respectable), I thought that Grosvenor Casinos had some strong selling points. Firstly, Grosvenor has exclusive slot games to play which help differentiate them from the majority of online casinos. Furthermore, the welcome bonus comes with a 5x wagering requirement - one of the lowest you’ll come across.

The competition couldn’t be fiercer when it comes to trying to determine the best online slot game. There are tens of thousands in circulation across online casinos worldwide, but there are some that have always proved to be immensely popular with online casino players.

What do we look for when assessing a slot casino? Here are some of the factors that affect our selections.

Slot Game Selection

You’re looking for the best slot casino, so the number of slot games on offer is clearly an important factor. We look at the quantity and quality on offer, as well as the different providers supplying the games.

Bonus Compatibility

An online casino’s welcome bonus is of critical importance. Are there free spins on offer? If so, how many? How much do online slots contribute to the welcome bonus? What are the wagering requirements? How many games apply to the bonus? If there are no free spins, how much of the bonus money can be used on slots?

Dedicated Slots Section

It’s important to look at how an online casino advertises its slot games, and how easy they are to find on the platform. We check to see whether slots have their own specific section on the website, and if they’re categorised even further. Is there a section for new slots? Do jackpot slots or Megaways slots have their own tab? It all matters.

Recent Slot Game Releases

Developers across the industry release hundreds of new slots every month, so a good online slot casino has its finger on the pulse for the hottest new titles.