Online Slots Reviews + Slot Sites is the home of online slots reviews in the UK. With over 4,000 slot game reviews, our team of experts have you covered. This is also a great resource for free slots in the UK as you can play slots demos before playing for real money. We cover slots from the likes of NetEnt, Playtech, Big Time Gaming, Play ‘n GO, Microgaming and lots more. I’m sure you’ll agree that its confusing when trying to choose an online slot to play. We provide the best online slots reviews including play for free as well as the best UK slot sites to play them at. Experienced player? Jump ahead to the latest slots. Newbie? Start with the best slot games in the UK.

New Slots

If you want new slot reviews, is the place to come to. We add the latest slot reviews as quickly as anywhere else. This includes exclusive slots and details of where to play them. We cover slot reviews from the best online slot providers including NetEnt, Play ‘n GO, Microgaming and Playtech. We also list the slots sites where the latest slots are available.

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Best Slots

Want to read reviews on the best online slots? You’ve come to the right place. With 1,000s of online slot games to choose from these days, we’ve hand-picked only the very best for you. These are popular with casino players and we highlight the reasons why in the in-depth slot reviews. This includes the best free slots as there are demos versions of these favourite titles.

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Megaways Slots

The Megaways game mechanic by creator Big Time Gaming has taken the online casino world by storm since it was made popular by the iconic Bonanza Megaways slot. With so many moving parts, our detailed Megaways slot reviews explain the engine behind our Megaways game which can vary as well as a look at the various exciting features they come with.

Megaways Slots List >
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Why is dedicated to providing the best online slots reviews. With a focus on UK slot reviews, our team of experts have worked in the online gaming space for close to 40 years combined. We work closely with slot providers so we know the thinking and all the ins and outs of a particular online slot which helps up write detailed slot reviews for you to read.

How do we conduct our slot game reviews?

Comprised of a team of slots players primarily, we’ve played thousands of casino slots both online as well as in land based casinos, pubs and arcades. As slot lovers, we look at every detail in the slot reviews to give you a details insight of how the slot game works. Our aim is to arm you with the necessary information so you can pick the right online slot for you. How’s here we review slots:

Slot Providers/Developers

We only write slot reviews on the best and most reputable slot providers. They all need to be trustworthy and licensed by the Gambling Commission. For example, we cover over 40 providers like NetEnt, Play ‘n GO, Microgaming and IGT (amongst others).  New and upcoming providers are also covered if they bring slots that are worthy to the table.

If you take Big Time Gaming for example, they were unknown only a few years ago. Since the introduction of the Megaways engine, they have become a household name and have licensed their innovation to other and bigger providers. In 2020, they released their first Megaclusters slot (Star Clusters Megaclusters). With other providers keen to create their own Megaclusters slots, it will lead to top slots which are innovative and enjoyable.

Slot Details

A slot review will firstly look at the number of reels and paylines. You will mostly find 5 reel slots with between 10 and 243 ways to win. Slot developers are working out new engines and ways to give payouts to players so have more rows, reels and symbols on the reels with some games offering over 1 million ways to win. Providers like ReelPlay have developed an Infinity Reels engine where the number of reels is, well, infinite.

Other slot review details include the stake limits (pretty self-explanatory), the Return to Player % (what you will get back in theory), hit frequency (how often you land a win) and the variance or volatility. The latter is important as some players want to make their balance last as long as possible whilst others are looking for that big payout. This leads up to the max win or max payout which is the most you can win from a particular spin or bonus feature. We also explain how that can be won.

Lastly, we look at whether an online slot game can played across multiple devices. With most games now been made using HTML5 technology, they are all available on iOS, Android and Windows operated devices. Some providers, like 4ThePlayer for example, have developed Portrait Mode versions of their games so they look better and occupy more space on smartphone screens.

Theme, Graphics & Audio

Whilst an online slot may have the best bonus features ever made and been creating by a top provider, a slot game needs to be appealing visually primarily. This depends on personal preferences of course with some players liking high definition graphics and animations and others opting for classic slot machines that remind them of an experience at a land based casino or arcade.

Our slots reviews look at the theme (such as ancient Egyptian, Norse mythology, Irish luck) and what they are inspired wise graphically. Some themes will tell a story behind the slot which captivates players which makes them come back for more. A classic example is Microgaming’s Immortal Romance which tells a dark story of love and intrigue. It’s 1 of the most popular slot games ever.

A certain themed slot will have symbols to match. With technology advancing all the time, the quality of the graphics has improved drastically over the last few years. This lead to an immersive playing experience and provides much more than just a slot game. The soundtrack/audio is an important factor as this reinforces the theme and adds to the playability.

Bonus Features & Mechanics

Whilst classic casino slots had 1 or 3 paylines and a limited number of paylines, newer slots have various ways to win. As a result,  bonus features are a vital part of a slot’ appeal. Most slot games offer free spins of some variety and wild symbols.

The most popular slots come up with some unique and innovative to make them stand out from the crowd. For example, the Megaways engine from Big Time Gaming unleashed bonus features never seen before. Other providers like NetEnt and Play ‘n GO regularly introduce new types of wild symbols into the mix which add to the excitement of a release. Our slot reviews look at all bonus features, what they can pay out and the mechanics and engines behind them.

Slot Review Analysis/Verdict

At the end of our slots reviews, we combine all the elements above and bring it together to give our feedback on the slot game. This can be good or bad as not all slots are great or amazing. Reputable providers still release slots that are simply unappealing. Whilst we tend to focus on the best slot reviews, we compare to similar titles and provide our recommendations if you’re looking for games that offer a similar bonus feature or theme.

Free Slots

Alongside our extensive online slots reviews, you will find free slots. This means you can play slots for fun here at This gives you the chance to sample the best slots to play and get a feel for when you play for real money at your chosen slots casino.

With over 4,000 online slot games available, finding the right one(s) can be daunting. You can play demo versions before visiting an online casino to see if you like it or not. With no download or signing up to complete, you can browse at your leisure and spin away till your heart’s content.

The play for fun free slots are exactly the same as you’d find at an online casino site so you can play without losing any money in order to find the right game for you. Obviously it’s play money so you can’t cashout your winnings but it gives you the chance to play your favourite slot when you like or try something new. If your balance reaches zero, just refresh the page to play again, and again.

With new slots being released daily, new concepts, themes, bonus features and game mechanics are being released all the time so our free demo slots are a good way to keep on top of new innovations.

In summary, Here are 10 reasons why should try our demo slots:

  1. Spin the free online slots to see if you like it or not
  2. See how the graphics, animations and theme look
  3. Inspect the paytable and rules
  4. Sample the bonus features and gameplay
  5. Free play slots allow you to become familiar with the game before playing for real money
  6. Try the free play slots on desktop, mobile or tablet devices
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How to Play Slot Demos at our Free Online Casino

  1. Visit the Online Slots page
  2. If you have a slot game in mind, use the Search function
  3. Click on the New Slots tab to find the latest releases
  4. Click on the Most Best Slots tab to access the most popular slot games
  5. Click on the Megaways Slots tab to find all games using the Megaways engine
  6. Like slots based on movies, TV shows or popular brands? Click on the Branded Slots tab
  7. Click on the Slot Providers tab to find all slots from a particular slot provider/developer

Perhaps you want the slots with the best payouts. Our best RTP slots page gives you the 7 games with highest return to player rate. The RTP rates are all above 97.71%!

Looking for a life-changing win? You could also check out the Jackpot slots section where you’ll find game that has offer progressive jackpots.

Free Mobile Slots

Touched on above, more and more players are playing free slot games on their mobile and tablet devices. All our demos are available to play across multiple devices that use iOS, Android and Windows operating systems. You can of course play free slots on your desktop device such as your laptop, Mac or PC.

With most slot games being produced using HTML5 technology, you can enjoy free slots for fun wherever and whenever you desire. Some slot providers are now mobile-first meaning they have mobile slot players are the forefront of their minds when it comes to production. This means more enjoyable playing experiences, sharper graphics and better functionality and gameplay.

Free Jackpot Slots

Whilst jackpot slots are found on our site, playing demo slots doesn’t allow you to win the progressive jackpots on offer. As you’re playing for free, the jackpots sometimes won’t show or won’t be available to win. With the exception of the Mega Moolah slot (Microgaming doesn’t allow players to play for free), all jackpot slots can be played for fun here at

Free Vegas Slots

Ever played slot games in land based casinos (like Las Vegas), arcades or pubs? Known as Vegas slots or slot machines, there are plenty of Vegas favourites here at Classics such as Rainbow Riches, Zeus, Cleopatra and Raging Rhino can be played for free.

Free Slots Age Verification (UK)

If you’re playing in the UK, you will need to verify your age before playing demo slots online. As of the 7th of May 2019, the Gambling Commission stipulates that affiliate sites must ensure that they have verified the age of any customer before they can access to free slot games. is proud to have been the first slots portal in the UK to introduce age verification. We’ve teamed up with age verification solution Verime to provider a simple and free process for all our UK visitors. When you open up a free slot page, here’s what you need to do:

  1. Click on the blue Verify Age button
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As mentioned, our age verification process is free and only needs to completed once. If you come across the verification popup again, enter your mobile number and the free play slot will load automatically.

Slot Sites Rankings

Now you’ve found the slot games you want to play, you’ve read the details reviews and tried in demo mode, you need a place to play them at. With a clear focus on the games, we recommend the best slot sites for UK players.

With years of playing slot games online, we take our slot site reviews very seriously as this is where ultimately you’re going to be enjoying the games themselves. Our focus is to provide clear and accurate information on the following aspects:

New Slot Site Reviews

You may be a seasoned player and have played at the top slot sites recommended here at In that case, you should consider our new slot sites.

With a UK focus, new slots casinos are reviewed more critically than established brands as they don’t have the longevity and reputation of older sites. We look at anything new they bring to the table including specialised promotions, new slot providers and slot games, more payment methods and mobile apps/sites.

We also go behind what you see and delve into the companies behind these new slots sites. It’s important to know where a new slot site is a white label, a new brand from an established operator or a brand new site with a good reputation in other markets.