Best Online Casino Sites for Slots 2021

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The Latest Blacklisted Casinos

Here at CasinoTop, we pride ourselves on identifying the best online casino sites for our Canadian players. Part of this undertaking is the testing of hundreds of online gambling sites to ensure that we are recommending only the best. However, we have come across a few sites that we don’t recommend. Take a look at the list below:

Cool Cat Casino

Cool Cat

Incorrect and misleading marketing relating to safety measures
Confusing wagering requirements
Inferior quality of games displayed
Planet 7

Planet 7

Customer complaints remain unresolved
Unprofessional customer service received
Stalled winnings being paid out
Grand Prive

Grand Prive

Consumer complaints ignored
Misleading claims to proper international licensing
Improper online casino practices in use

Play The Best Free Online Slots

What Makes a Top Slots Casino Site?

Since CasinoTop has been a vital part of the gambling industry since 1998, we have used our years of experience to create a thorough reviewing process to find only the best slots casino sites. Casino operators that we recommend have all passed the following tests with flying colours:

Extensive Slots Catalogue

As one of the most popular gaming genres in the world, online slots come in many variations and designs with unique and exciting features. There are thousands of great online slot gaming titles for Canadian players to enjoy and our list of recommended casinos offers players a huge selection from within this genre. This includes video slots, classic three-reel titles and even progressive jackpot games.

Premium Gaming Quality

One of the most important things that our team looks at is the quality of the games on offer at each site. While a wide variety is an exciting prospect, your hopes would be dashed if these titles were all of an inferior quality. As such, our recommended casinos offer hundreds of premium slot gaming titles that have been provided, developed and maintained by some of the biggest names in the gaming development and software industries.

Lucrative Welcome Bonuses

Our top-rated sites for online slot games all offer new players exciting and lucrative welcome bonuses. In order for an online slot to receive our endorsement for slot gaming, the operator has to offer a competitive welcome bonus that provides players with free gaming credits and free spins to get the most out of their bankrolls.

Stellar Overall Slot Gaming Experience

In addition to this, the casino needs to provide players with superior security, outstanding customer services and a wide variety of payment methods. Should our team find that the online casino operator provides all of the points listed above, the casino site will make it onto our list of top-rated online casinos for slot gaming. Our Canadian players can rest assured that CasinoTop conducts checks on the sites that we have recommended every few weeks to ensure that the level of service, security and gaming quality has remained top-notch.

Free-to-play slots Vs. Real Money Slots

Real Money slots

Players stand the chance to win large amounts of money which makes the game that much more entertaining
Real money slot players in Canada are eligible for free spins, bonuses and promotions
Real Money allows players to try their luck at winning progressive jackpot prizes
The risk sometimes does not pay off and players could lose a lot of money
Withdrawals cannot be processed instantaneously and can take a few days for the process to be completed

Free Games slots

Gives Players a chance to try the game before risking their own cash
Can be played via mobile sites and applications.
No need to sign-up or share personal information before you play
Playing for free does not make you eligible for rewards and bonuses
Any money won during free mode cannot be kept or claimed

How Slots Bonuses Work for You

Here at CasinoTop, we are well aware that the promotions and bonuses available at an online casino site will either lead you to signing-up with a site or disregarding it. Online operators have learned that they need to offer competitive, lucrative and sought-after rewards and bonuses to get players to sign-up for their services and stay loyal to them.

We recommend that our players take advantage of the welcome bonus as well as the ongoing promotions as these offers can stretch your bankroll and allow you to play for longer.
Naturally, the more you spin the reels of a particular slot, the more your chances of winning increase over time.

In addition to this, certain slot gaming titles, especially new releases, will offer players a specific number of free spins that do not require a deposit for you to be able to redeem them. However, it would be best to read through the terms and conditions of every promotion or bonus to ensure that you fully understand the wagering requirements and playthrough before redeeming your reward. Bonuses with high wagering requirements could lead to you not seeing your earnings until you have met the specific figures.


Use this tool to compare bonuses at different online casinos and stick with the casinos that have the fairest wagering requirements. Always make sure to read the T&C before accepting a bonus.

Bonus Calculator

Calculate the best bonuses available online

As some casinos will give the best bonus right on your first deposit, and others might require several deposits to unlock the offer, the casino with the best offer here will change depending on the amount you enter.


As some casinos will give the best bonus right on your first deposit, and others might require several deposits to unlock the offer, the casino with the best offer here will change depending on the amount you enter.

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Online Slot Varieties

Slot machines have been around for almost a century now. This has given gaming and software developers time to enhance the traditional variation of slot games and bring Canadian players a wide variety of exciting slot gaming experiences. From the classic three-reel slot to the modern multi-ways and feature-studded titles, there is sure to be a game for everyone. Below you can read about each variant:

Three Reel Slots
Multiple Paylines and Reels
Video Slots
Progressive Jackpots

Three Reel Slots

Three-reel slots are the most traditional form of slots as we know it. As its name suggests it features three reels, up to three active paylines and three rows. As a means of paying homage to this popular classic, gaming developers tend to make use of 2D drawings of traditional symbols such as Aces, fruit, cherries, gems etc.

Multiple Paylines and Reels

As players’ love for slot machines grew, so too did the reels. These days, gaming developers have created online slot games that have 3 or more reels, 5 + rows and infinitely more paylines. This is why these games are referred to as Multi-reel and multi-payline games.

Video Slots

Video slots are one of the most popular variants of online casino slot titles today. This is likely because these games bring an almost cinematic experience to players and include fun themes, appropriate symbols and epic background music.

Progressive Jackpots

Progressive jackpots are referred to as “millionaire makers’ because these jackpots are usually life-changing. The slot games themselves are generally designed as video slots. However, a percentage of each wager placed on the slot goes towards a massive prize pool. This pool will grow according to the wagers that are placed across casinos and on all the slot games that are in the same network.

Rated Online Slots

While variety certainly is the spice of life, choosing just one online slot game that suits your wants and needs perfectly can be overwhelming when there are so many options. To make this process easier, our team has compiled a list of the most popular online slot games that offer huge prizes, superior gaming quality and can be played on mobile devices. Our current favourites are Mega Fortune, Avalon II and Guns ‘n Roses as well as others.

Online Slots Strategies for Canadian Players

Despite slot games being hailed as the greatest games of chance and luck, there are a few things that Canadian players can keep in mind to enhance their chances of walking away with prizes. All online slots will include statistics that share how often the slot pays out, the average amount that gets paid out and how volatile the game is. Seasoned players know that slot results are always random but taking these aspects into consideration can help them understand how to place wagers in a way that increases their odds. You can make use of the following guides to help you along.

Payout Percentage Explained

Whether you’re just starting out or you’ve been playing online slots for some time, it is always good to know what the average Return to Player (RTP) percentage is for your game of choice. Online casino regulators and auditors have ensured that this percentage is prominently displayed on every slot machine or game. The percentage allows players to calculate how much of your bet will be paid out to you if lady luck is on your side. For example, an RTP of 96% means that for every C$100 wagered on the game, the game pays out C$95. Below we have outlined the RTP percentages for some of the most popular slot games:

Online Slots with the Best RTPs 2021

  1. Avalon II - 97%
  2. Guns ‘n’ Roses - 96.98%
  3. Thunderstruck II - 96.65%
  4. Wheel of Fortune - 96.6%
  5. Mega Fortune - 96.4%
  6. Starburst - 96.1%
  7. Wizard of Oz - 95.99%
  8. Flaming Hot - 95.53%
  9. Book of Ra Deluxe - 95.5%
  10. Triple Diamond - 95.06%

Top Strategy Tips

Start out Small

It shouldn’t come as a surprise that most Canadian players would love to win a huge jackpot prize and are actively trying to do so. However, this means that your individual odds of winning a life-changing jackpot are somewhat diminished. Smaller jackpots get far less attention and, therefore, offer better odds. This is a great place to start before you chase a progressive jackpot.

Try the Classics

Although classic games might not look as appealing as more modern gaming titles, your bankroll will thank you for giving the humble titles a chance. Due to the setup of three-reel titles, RTP percentages are usually much higher whereas multi-pay and multi-reel games have many other variables factored into the equation

Consider Safety

While choosing an online slot game is exciting and fun, we implore our Canadian players to ensure that the casino site they sign up with is licensed, secure and provides fair games. You can find this information on the site itself by looking for licensing and auditing certifications. Alternatively, players can take a look at our list of our secure top-rated casinos above.

Locate Bonus Rounds

Certain gaming providers have built exciting and lucrative bonus rounds into their online slot games. These bonus rounds can sometimes double or even triple your earnings. Besides adding interest to the experience, bonus rounds can lead to some great prizes.

Popular Slot Developers

As the world of online gambling continues to grow all over the world, gaming and software developers have had to come up with innovative and quality gaming experiences to cater to the increasing need. During this time, a handful of operators have managed to impress players with their creations so much that they have become some of the most sought-after developers in the world. Below are the names of some of the most reputable gaming providers in the industry today:

  • Real-Time Gaming
    Microgaming Logo
    Playtech Logo
    Aristocrat Logo
    NYX Logo
  • Merkur Gaming Logo
    Novomatic Logo
    Cryptologic Logo
    Betsoft Logo
    NetEent Logo

FAQs for Online Slots Gaming

Can I play online slots on my mobile?
Yes, online casino operators in Canada have made sure that the vast majority of their online slot titles render seamlessly to mobile devices. This means that you can play on-the-go while enjoying the same premium experience you’re accustomed to.
How do I know that an online slot is fair?
Online gaming developers have to hire auditors to test their gaming titles. All slot games are built with Random Number Generators and this technology is responsible for ensuring that results are random. Gaming and casino site auditors will test the integrity of the RNG to make sure that the game cannot be tampered with. Once the game has passed the relevant testing processes, the developer and casino will receive a certificate of fairness that will be displayed on the game/site.
What are free spins and how do I get them?
Free spins are rewards that online casino operators give to their players. In most casinos, new players will be privy to a set number of free spins as part of the welcome bonus. Existing players can redeem free spins by participating in ongoing promotions that give away free spins. Free spins allow you to turn the reels of an online slot without having to wager any of your own money.
Can I play online slots for free?
Yes, our list of top online casino sites all over our Canadian players free versions of popular games. These games can be played even if you have no credits in your account or you have yet to sign-up.
Are online slot games popular in Canada?
Yes, online slots are extremely popular in Canada. In fact, slot games are one of the most popular games in the world. It is especially favoured by social gamblers, occasional gamblers and novice players due to its simplicity.