Top 5 free online slots 2025
One of our aims here at CasinoHawks is to introduce you to some of our favourite online slots. Demo slot games are a fun, risk-free way to learn the rules and discover new titles. That said, it’s important to remember that any “wins” made during gameplay cannot be exchanged for real cash prizes.
With that in mind, join us to learn everything you need to know about the best free online slots, including where to play them.
Spoiler: the games mentioned in this guide are absolute classics.
Starting in April and May 2025, new stake limits for online slots will be enforced by the UK government. Players aged 25 and older will have a £5 per spin limit, while those aged 18-24 will be restricted to £2 per spin, all to encourage safer gambling.
1. Big Bass Splash – 95.7 % RTP
Are you partial to a fishing-themed online slot? Yep? Then you’ll likely have heard of the popular Big Bass Splash by Pragmatic Play. Arguably one of the most popular slot games in the UK, Big Bass Splash is the ultimate 5 reel, 10 paylines fishing adventure. Before gearing up with your rod and reel, sink your teeth into the Big Bass Splash demo to practice before playing for real money.
2. Rainbow Riches – 95 % RTP
Rainbow Riches is a solid choice if you’re a fan of a classic slot game with an iconic theme. Originally land-based, this online slot has 5 reels, and 20 paylines, and remains one of the most enjoyed games in the online casino world. Although a lucky charm is not guaranteed, the Rainbow Riches demo will give you a good idea of what to expect before committing with cash.
3. Fishin Frenzy – 96.12 % RTP
Reel in the fun with another fishy classic; Fishin Frenzy by Blueprint Gaming. With medium volatility and the potential to bag a max win of 50,000x, this slot game will have you on the edge of your seat. Players can give this slot a practice run by spinning the Fishin Frenzy demo at many UK casinos.
4. Gates of Olympus – 96.5 % RTP
Another classic from Pragmatic Play, Gates of Olympus takes you to the clouds above – quite literally. Located in Zeus’ palace, this slot is a firm favourite amongst us Brits with its 6×5 reel and the potential to win 5000x your bet. But before you lightning bolt in there to play for real money, give the Gates of Olympus demo a spin.
5. Sweet Bonanza – 96.5 % RTP
Full to the brim of sugary treats, the iconic Sweet Bonanza has been tantalising our tastebuds since 2019. This slot game is fairly typical with its 6×5 grid and fixed paylines, but that doesn’t make it any less thrilling. The Sweet Bonanza demo is a great way to get your sugar fix without the commitment.
Is it safe to play free slots online?
Whether slots are safe to play (or not) depends on the licences and security processes employed by the casino or site you are playing at. All slots available for free at trusted UK online casinos are tested and approved by the UK Gambling Commission (UKGC), which is the same institution that licences online casinos.
If you want to know more about keeping yourself safe while playing online slots, we recommend going through our Responsible Gambling page.
Are free online slots legal in the UK?
Free online slots are legal to play in the UK, if with an important requirement – the site offering the free slots, regardless of whether it is an online casino or not, needs to first verify your age before allowing you to play. This is due to regulations set by the UKGC that make age verification compulsory to ensure children and teenagers under the age of 18 are not exposed to gambling content.
If you’re a registered online casino user, you can safely play the slots in demo mode if the online casino allows you to do so. In the case of sites offering free slots, you will need to verify your age through free services such as AgeChecked.
Why do casinos allow you to play for free?
There are two main reasons why casinos allow players to try slots for free. First, it’s to give customers a chance to try new slots and games before they actually spend money on them. That way, they can confirm that they enjoy the slot and its mechanics. Second, free slots are a means to promote safe gameplay, since players will still be able to enjoy slots without spending their money.
Why play free slots online?
As mentioned above, playing online slots for free is an opportunity to try out a game without spending your money! This way you can test out special features and get a general feel of the game before actually staking money on it. This can be particularly helpful if you are completely new to playing slots.
Pros and cons of playing free online slots
While it’s great to be able to play slots for exactly zero pennies, we have to admit that free slots are not perfect. With that in mind, here are the pros and cons we have found of free online slots:
| Pros of playing online free slots | Cons of playing online free slots |
|---|---|
| ✅ A great way to learn how to play a game | ❌ No real money can be won |
| ✅ No deposits or real funds required | ❌ You cannot access most casino bonuses and promotions |
| ✅ You can practice and test out strategies for free | ❌ Not all casinos offer free games |
Best game providers for free online slots
Want to know which companies are behind our favourite free online slots? Well, here they are:
| Provider | Popular free slot |
|---|---|
| NetEnt | Starburst |
| Play’n GO | Book of Dead |
| Pragmatic Play | Big Bass Bonanza |
Can you make money by playing free online slots?
While most casino sites allow players to play slots online for free and may sometimes be rewarding, such gameplay sessions don’t lead to real money payouts because they are for entertainment purposes only. That said, some casino sites offer no deposit free spins bonuses that allow you to boost your gameplay sessions.
Best no deposit free spins online slots
You can enjoy some of the best online slots in the UK for free with a no deposit bonus. This admittedly rare promotion is exactly what it sounds like – a bonus given by a casino with no deposit required. Better still, unlike playing slots in demo mode you can potentially win real prizes by playing with a no-deposit bonus.
That said, make sure you are familiar with the terms and conditions of any no deposit bonus you accept from a UK bonus. These cover everything from the expiry period of the bonus to any wagering requirements involved.
Popular free no deposit online slots in the UK
Here are some slots we’ve noticed available in no deposit free spins offers currently available in the UK:
| Offer | Slot game | Significant T&Cs | Where to play |
| Mystery Free Spins | Betfred Cosmic Cows, Better Wilds, Blue Wizard, Cheltenham Sporting Legends, and more. | Opt-in required | Betfred |
| Daily Rainbows | Rainbow Riches | Previously deposited & wagered a min of £10 on the account | Rainbow Riches Casino |
5 best free online slots for mobile
Don’t feel left out from the free slot fun if you prefer to play at a mobile casino or using a casino app – most, if not all, free slots are also available on your smartphone or tablet! Here are just 5 games that we suggest that you play on your mobile device:
Have fun playing slots for free!
Trying a demo at a trusted UK online casino is a great way to have fun playing slots without spending money! Demo slots are available at most of the best online casinos once you register your account. If you are a member at a casino then you can also take advantage of the casino bonuses. So good luck and, as always, play responsibly.
Frequently asked questions
