The Best Online Slot Sites 2021

In the mood to hunt for real cash jackpots playing slot machines for free online? You’re in luck. Our exclusive list below gives you free play bonuses at the best online slot sites.

online slot sites


Slot Sites

Monster Casino: £1000 matched bonus+ 100 Free Spins!

Monster Casino: £1000 matched bonus+ 100 Free Spins!
£1000 matched bonus+ 100 Free Spins!
Malta Gaming Authority

MGA License Number

JustSpin Casino: 600 Free Spins – 100 Spins No Deposit!

JustSpin Casino: 600 Free Spins – 100 Spins No Deposit!
Signup for 100 Free Spins No Deposit
Malta Gaming Authority

MGA License Number

Sticky Wilds: $€500 Matched Bonus and 200 Free Spins!

Sticky Wilds: $€500 Matched Bonus and 200 Free Spins!
$€500 Matched Bonus and 200 Free Spins!
gaming curacao logo

License Number

Vegas Lounge Casino: 50% Cashback up to €400

Vegas Lounge Casino: 50% Cashback up to €400
Cashback up to €400
Malta Gaming Authority

MGA License Number

Evospin: 100% up to €300 + 100 free spins!

Evospin: 100% up to €300 + 100 free spins!
100% up to 300 euros + 100 free spins!
Malta Gaming Authority

MGA License Number

Spin Rio: 300 Spins + €1111 Bonus!

Spin Rio: 300 Spins + €1111 Bonus!
300 Spins + €1111 Bonus!
Malta Gaming Authority

MGA License Number

Skol Casino: 10 Free Spins No Deposit

Skol Casino: 10 Free Spins No Deposit
10 Free Spins No Deposit + €1300 Bonus & 250 Bonus Spins
Malta Gaming Authority

MGA License Number

In the mood to hunt for real cash jackpots playing slot machines for free online? You’re in luck. helps you to play the best online slots at the best casino sites. We work non-stop to find you the latest deals.

We also include an expert guide that gives you insider tips on boosting your bankroll, finding a game that’s perfect for your needs and much more. Scroll down to get professional advice before starting your real money prize adventure today.

Why Play At a Slot Site From Our List?

When we discover a new slot site, our team of gambling experts conduct a thorough review to see if it meets our high standards. Each site must:

  • Hold a gambling license
  • Have a professional customer support team that replies to you quickly
  • Use encryption technology to protect your data
  • Give you rapid withdrawals on your winnings
  • Have games from top-rated slot developers
  • Accept trusted payment methods

By screening each slot site, we can guarantee that you’ll only find deals from the best slots sites on our list. What’s more, if a site’s facilities meet our requirements, we contact its team directly to get you exclusive free play offers. As a result, our list only gives you the most generous deals.

Of course, you can find a quality deal yourself. But why not let our experts do the hard work to save your precious gaming time? Also, we recommend that you play it safe by claiming a free spins bonus through us because, unfortunately, many unregulated scam slot sites are looking to rip you off.

How Do I Open An Account to Claim My Bonus?

Claiming your slot site bonus is easier than ever. Follow our simple step-by-step guide to enjoy yours today.

  • Choose an offer from our list of slot site bonuses.
  • Click the link to check the terms and conditions
  • If they suit your gaming style, click accept.
  • Fill in the online form with your details.
  • Send the casino’s banking team a picture of your ID, a paid bill from the last two or three months, your payment card details (or a screenshot of your wallet), and a recent bank statement to verify your new player account.
  • Once verified, access your new account to enjoy your bonus

What’s The Difference Between Slot Sites and Online Casinos?

Nowadays, online casinos offer you great slots and other games: blackjack, poker, roulette, etc. However, slot sites focus on providing you with slot machines. Yet, this doesn’t mean that one is better than the other. What makes a slot site or online casino right for you are its games, ongoing promotions, payments methods and other individual touches.

Therefore, to ensure you find your perfect match, our website features great offers from varied types of slots platforms. Look through our list of handpicked bonuses to start your cash prize hunt at a slot site that’s right for you today.

Why Do People Play Slots Online?

Many people decide to play slots online instead of at brick-and-mortar casinos. But why? Firstly, because most slot sites are mobile compatible, you can enjoy playing for real cash prizes wherever you want. Also, playing online is much more time-efficient than heading to a casino.

The other main reason gamers play online slots instead of physical machines is that they pay out more often. The standard Return to Player (RTP) of land-based machines is around 70-80%, whereas online slots give you a far more generous RTP average of 95-99%. These virtual games have a higher RTP because they are much cheaper to run than casino machines.

What Is RTP for Online Slots?

RTP stands for return to player. Shown as a percentage, the RTP refers to the amount of money players get back from bets. So, if a slot has an RTP of 97%, the casino pays out $97 for every $100 spent on it. However, this is a simplified example – the RTP doesn’t apply to set sums or your gaming session. It is instead determined from thousands of bets from different players.

Be aware that random number generator (RNG) software calculates the result of each spin when you play slots online. Therefore, you could hit the jackpot with a single bet.

Different Types of Online Slot Machines – Find One Perfect for You

Online slot machines come in all shapes and sizes. However, the most important thing to keep in mind when choosing a slot machine is the casino game’s volatility. Slot volatility refers to the probability of winning when playing. There are three types: high, medium and low volatility.

High volatility games, such as Blirix Workshop by Iron Dog Studio, reward you with considerable payouts but not so often. So, if you’re a patient player that likes landing big wins, these are perfect. However, if you don’t like waiting, low volatility games like Starburst by NetEnt will suit your needs more, as they give you frequent yet smaller wins.

Finally, medium volatility slots are a good choice if you’re looking for decent winnings reasonably often. Yet remember, because of RNG software, the result of each spin is entirely random.

Jackpot Games

If you’re looking for massive cash prizes, we recommend trying out progressive jackpot slot games. The gameplay of progressive jackpot slots is the same as a regular online slot. However, the payouts are enormous because people playing the same slot contribute to the prize pot every time they place a bet.

As a result, the real money jackpots are enormous – many of them are over one million dollars. For instance, In 2020, a lucky gamer won over six million dollars playing Mega Moolah.

Slot Themes

Top developers release new slot machines with varied themes all the time. Our experts recommend playing established video slot titles – Gonzo’s Quest, Book of Dead, Dead or Alive – or branded games. Brand theme slots usually have more money behind them and, as a result, give you high-quality gameplay. A few of our favourites are Monopoly, Gordon Ramsay Hell’s Kitchen and Peaky Blinders.

How To Play Slot Machines: Expert Tips

1. Check the Paytable

The slot’s paytable gives you all of the game’s information: payouts you can win, available prizes, and how to trigger the game’s features. We recommend finding the answers to these questions when looking at the paytable:

  • Does it offer you different bet amounts?
  • Can you win a jackpot playing this game?
  • What bonus rounds does it have?

Doing this helps you avoid playing slots that don’t suit your gaming preferences.

2. Play the Slot Machine for Free

Yes, you can play the best online slots for free using the bonuses on this page. This is a risk-free way of learning the dynamics of a slot machine. Some casino games have special features such as wild symbols, in-game free spins rounds, extra games of chance that can double your winnings, and much more.

Our experts recommend testing various games to find out which slot machines you enjoy before depositing your hard-earned cash.

3. Control Your Bankroll

Bankroll management is simply tracking how much you spend when gambling. We advise you use Google Sheets or a logbook to record your wins and losses. Professional poker players always use this money management system, and it also works for slot gamers like you.

Another expert tip is to open a separate account only for your gaming. Doing this makes keeping track of your bankroll even easier. Even if you’re a part-time player, our experts recommended that you manage your bankroll to gamble responsibly.

Slots Payment Methods

Most UK slot sites give you varied payment options. These include Visa, Mastercard, PayPal, Apple Pay and even bank transfers. However, because of restrictions brought in by the UKGC in 2020, you can no longer fund your account using your credit card.

If you want to make fast deposits and withdrawals, we recommend using cryptocurrencies like bitcoin. Remember to read our slot site reviews to learn about the various deposit and withdrawal methods available before signing up.


What are the best Progressive Jackpot slots?

This depends on what type of slot game you enjoy. However, the most popular and arguably best progressive jackpot slots are Mega Joke, Jackpot 6000, Mega Moolah and Major Millions. Progressive jackpot games can potentially reward you with enormous cash prizes. Fancy chasing the biggest cash prizes? Sign up with one of the slot sites featured in this guide to play them for a chance to win today.

Can I use my mobile device to play at slot sites?

Yes. Most slot sites let you hunt for cash prizes using your mobile. Some platforms even have a specialised app that makes enjoying your games on your iOS or Android device even smoother. Even if the slot machine website doesn’t have an app, you can access its lobby using your preferred browser. Use your phone or tablet to claim a sign-up bonus to play your favourite games on the go.

How do I find the best slot games?

The best slot game for you might not be the best slot game for someone else. Therefore, as we’ve mentioned in this guide, figure out what types of slots you enjoy the most. Once you’re sure of your tastes, claim some free play to test out games first-hand. Our exclusive list gives you complimentary spins to play top-rated games and up-and-coming titles. So, claim one of our exclusive bonuses to help you find the best slots for your needs.

Can I win real money playing slots online?

Of course. Many players win cash prizes spinning the reels. Yet, remember – the house always wins. This phrase is especially true when you check the RTP (return to player) percentage of online slots. So, if you’re looking to earn lots of money playing slots, you need a lot of luck. However, as RNG (random number generator) software determines the results of each spin, it is possible to win substantial cash prizes.

Do some online slots give you more wins than others?

Yes. You can find this out by checking the game’s volatility. Low volatility slot machines reward you with frequent small wins. Also known as low variance, low volatility games are perfect if you like winning often. On the other hand, high volatility games give you bigger wins less frequently. So, if you prefer waiting for more generous prizes, we recommend you play high volatility slot machines such as 300 Shields.