Best Online Slot Sites in 2024

Are you ready to spin the reels of your favorite slot machine? Are you eager to join the dynamic and fast-paced world of online slots? If so, we have you covered. 

Top Real Money Online Slot Casinos

In the U.S., both real money online slot casinos and social casinos are vying to deliver the best experience. To help you navigate through this convoluted world, we have prepared a compelling guide that gives you what you need to know about the best slot sites. First and foremost, we will start with some of the best real money online slot casinos in the U.S.

CasinoBonusFeaturesBonus Code
Caesars Palace Online CasinoDeposit $50 and Receive an Instant $25 Casino Bonus* Well-known brand
* Exclusive slots including Megaways
* Deposit bonus
* Rewards program
* Extensive variety of games
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BetMGMGet a 100% Deposit Match of Up to $1,000 plus $25 “On the House”* Plenty of exclusive slots
* Attractive welcome bonus
* Las Vegas experience
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BetRiversGet a 100% Deposit Match of up to $250 as a Casino Bonus*Deposit bonus
* Iconic brand
* Exclusive slot games including jackpots and classics
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bet365Get a 100% Deposit Match of up to $1,000* One of the world’s top gambling brands
* Good deposit bonus
* Outstanding customer support
* Solid game variety
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FanDuel CasinoGet 50 bonus spins after a $10 deposit, and get up to $1,000 back in casino bonus if you’re down after your first day!* Top brand recognition
* Extensive slot game variety
* Bonus spins for you to try out your favorite games
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Hard Rock CasinoGet a Deposit Match of Up to $1,000 and 1,000 Free Spins* Amazing free spins bonus
* Legendary promotions
* Rewards program
* Great game variety
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888 CasinoGet a No Deposit Bonus of $20* No deposit bonus
* Plenty of slot games available
* Backed by a global brand
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As we navigate through the article, you will learn about some of the best real money online slots for U.S. players. Two games that we highly recommend are Mega Moolah, which has four progressive jackpots, including one called Mega Jackpot which can reach $1M+ amounts. There’s also Mega Joker, which is the game that gives players the highest probability of winning, according to our indicators. 

Best Site for Online Casino Slots - Editors’ Choice

Choosing the best online slots is not an easy task. 

As curators of slot gaming experiences, our selection is the result of a thoughtful evaluation, one in which we consider various factors that ensure an enjoyable and rewarding slots gaming experience for our community. 

We are very careful about only working with online casinos that have a solid and outstanding reputation, and that operate on the right side of the law. 

Throughout the article, we will cover the nuances of slot games, including some tips to win big at some of the most popular options. Remember to have fun and only bet what you can afford to lose.

Highest-Paying Online Slots to Play

If you are chasing the highest-paying online slots, there are two terms that you need to become familiar with. 

The first one is the RTP, which stands for return-to-player. Basically, this indicator shows whether a game has the potential for significant payouts or not. Mega Joker tops the list with an RTP that can go up to 99%. 

The second term to know is progressive jackpots. Basically, a progressive jackpot is one that features a special reward that builds up until one player gets the winning combination. This offers the potential for enormous winnings.

How We Choose The Best Online Slots

At Lines, we want to make sure that we are bringing you the best of the best when it comes to online slots. 

This is why we personally play the games we recommend, and carefully evaluate every online casino that we recommend. The first factor that we consider is whether a casino is legally licensed to operate. If not, that’s a red flag right there. Then, we conduct rigorous testing to ensure that the games are not manipulated and that players have a fair chance of winning. 

For example, an indicator that we look at is the RTP, which stands for return-to-player. Shown as a percentage, it indicates the game’s potential for payouts. We also look at player reviews and feedback from our community to gauge user satisfaction, as we want to make sure that we are only recommending games that will be entertaining and fun, as well as fair and with a realistic chance of winning. 

What Online Slot Types Are the Best? 

It depends on personal preference, but here are some of the popular online slot types. 

Classic Slots: With three reels, classic slots can be reminiscent of traditional slot machines and are the online casino’s attempt to resemble a Las Vegas experience. Expect a feeling of nostalgia to be evoked with the classic slots they have to play. 

Video Slots: This is the most popular type of online slot game in the market. Commonly, video slots have five reels and feature a variety of themes, including adventure, fantasy, and history. 

Megaways: Some casinos will offer Megaways, a special variety developed by Big Time Gaming which offers many dynamic ways to win. Pay attention, because these slots can have thousands of paylines, which also means frequent winning combinations. 

Progressive Slots: These are the holy grail of those who are chasing big winnings. Basically, a progressive online slot game features a jackpot that will continue to grow until someone hits the winning combination.

Best U.S. Online Slot Casinos in 2023

Caesars Palace Online Casino

From Caesars exclusives like Caesars’ Fortune and Gold Cash Free Spins Megaways to long-established slots like Candy Bars and Astronomical Magic, Caesars is the way to go for a Vegas-like experience. If you have ever been to Las Vegas, you most likely are aware of the Caesars brand, especially because of its landmark property, Caesars Palace. Now, Caesars gives you the chance to take that experience home and gives you an instant $25 casino bonus provided that you deposit $50. 


Bet365 is one of the world’s most recognizable brands when it comes to online gambling, and in regards to slots, it is no exception. The platform features original games like Book of Claddagh, Maximum Vegas, and Mariachi de los Muertos, in addition to all-time favorites like Wheel of Fortune, Wolf Run, and Divine Fortune. Known for its solid reliability, wide game variety, and top-notch customer support, bet365 is offering new slot players and all online casino players a welcome bonus. If you deposit up to $1,000, bet365 will match your initial deposit. 


BetRivers is an established casino name in the United States. The site is offering an attractive bonus in which they give you a 100% deposit bonus match of up to $250. So if you make a deposit of $250, you will have $500 to play with, considering both your deposit and your bonus. You can use your bonus to play over 250 online slot games, including Buffalo, Dwarf Riches, and Piggy Pennies. 

Hard Rock Online Casino

A legacy hospitality brand, Hard Rock has leveraged its dominance in the live entertainment realm to develop a thriving online casino. Featuring slot classics like Cleopatra, Starburst, 88 Fortunes, and Bonanza, Hard Rock is guaranteed to provide you with a top-notch gaming experience. Plus, if you join as a new customer, you will get a deposit match of up to $1,000, in addition to 1,000 Free Spins. 

FanDuel Casino

Over the past few years, FanDuel has become a synonym for online entertainment in the United States, and its casino app is no exception. The platform boasts unique slots like Fort Knox, new games like Space Invaders and Thunder Struck, and jackpot opportunities with games like Divine Fortune and Bass Boss. Plus, if you make a deposit of $10, you will receive 50 bonus spins! 

888 Casino

If titles like Safari Riches, Holy Mackerel Shark Bait, and the uniquely-themed Christmas Big Bass Bonanza sound appealing to you, then check out 888 Casino. In the United States real money casino market, 888 Casino stands out because it offers a $20 no deposit bonus. Just for creating an account with 888 Casino, you will receive $20 to try your hand at your favorite games and start winning. 


With plenty of exclusive titles like The Terminator Win & Spin and Whales of Cash Rising Jackpots, BetMGM is another iconic Las Vegas brand that brings its pedigree to the online gambling world. For new players, BetMGM has crafted a promotion that includes a 100% deposit match up to $1,000, and $25 “on the house,” which you will receive as an additional bonus to start playing the best slots they have available. 

Best Progressive Online Slots for Real Money

If you are looking to win big when playing online slots, then scouting those that offer the progressive online slots feature is the way to go. Here are some of those progressive online slots that, over the years, our community has highlighted because of their potential for high payouts. 

Mega Moolah: Developed by Microgaming, this is possibly the most famous progressive slot game out there. The core feature of Mega Moolah is its four progressive jackpots, which include one called Mega Jackpot that can often reach $1M+ amounts. 

Mega Fortune: One of NetEnt’s poster children, Mega Fortune is themed around luxury, in line with the three progressive jackpots that can make the winner a millionaire several times over. 

Hall of Gods: Another NetEnt classic, Hall of Gods features a Norse mythological theme, as well as three progressive jackpots that can considerably boost your winnings. 

Aztec’s Millions: With a seven-figure progressive jackpot, this game from RTG will for sure make your adventure through the Aztec civilization more exciting.

Real Money vs. Free Slots

Whether you are putting real money on the table or just playing for fun at one of the many slot games that online social casinos have to offer, there are advantages and disadvantages to both. At the end of the day, the choice depends on your goals and intentions.

Real Money Slots Pros

The main advantage of playing a real money slot is that if you win, you get real money in return right away. This can add an extra layer of thrill and excitement to the game. Many experienced slot machine players say that what keeps them going is that adrenaline they feel every time they spin the reels. 

Also, another pro is that when you play at real money slot machines, you access the opportunity to play for progressive jackpots, where the wins are sizable. 

Real Money Slots Cons

As we would expect, the main drawback of playing real money slot games is that you can lose money. While this is part of the game, and should be budgeted as an entertainment expense, which is why you should never bet more than you can afford to lose.

To prevent this, we recommend managing your bankroll and setting limits both in terms of the money you are willing to wager and the time that you spend playing. 

Free Slots Pros

The best part of free slots is that there is no risk. Because you are not making an initial deposit, you are not putting any of your money at risk, so you can play your favorite slots without a worry in the world. 

In addition to this, this can help you understand how the game works, refine your strategy in terms of choosing your paylines and bet levels, and try different games. If you are planning on playing slots in the long run, you can look at your free slots stage as a trial. Take advantage of this to try as many games as you can, for free, before you identify those games in which you would be willing to bet money. 

Free Slots Cons

Depending on which social casino you choose, your access to financial winnings will be limited if you are only playing free slots. Most likely, you will receive your winnings in the form of virtual currency. This, in addition to the potentially limited features–progressive jackpots might be unavailable, for example–are the two main drawbacks.

Online Slots Software Providers

Many software providers are developing thrilling casino games on an ongoing basis. And, because there is so much competition in the online casino industry, we can only expect more exciting casino games to be coming our way. As of now, here are some of the most common software providers, who delight us with the best online slots. 

Microgaming: This is the company behind Mega Moolah, which has gained notoriety because it has awarded some of the largest online jackpots. 

NetEnt: This firm has earned wide acclaim after developing casino games that boast high-quality graphics and immerse the player in a unique experience. Examples include Starburst, known for its vibrant and colorful scene, Gonzo’s Quest, and Mega Fortune, another jackpot favorite for big hitters. 

PlayTech: If you are a fan of movies and TV shows, you might have found that some of them are actively featured in online casino games. If so, PlayTech is most likely the company behind that initiative. This might be particularly appealing if you are a comics fan. PlayTech has slots modeled after Superman, the Justice League, and much more. 

IGT: Standing for International Game Technology, this is the producer of many long-time favorites like Wheel of Fortune, Da Vinci Diamonds, and Cleopatra. By blending history, pop culture, and big winnings, IGT has become one of the most famous developers of online slots. 

Pragmatic Play: If you have played Sugar Rush, Wolf Gold, or Sweet Bonanza, then you are familiar with what Pragmatic Play has to offer. These slot games have a positive reputation in the market, and they are known for being easy to play, engaging, and boasting a wide array of themes.

CasinoBonusFeaturesJoin Now
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Visit Pulsz Casino and Play Blackjack Now! Online CasinoGet $30 in Stake Cash and 250,000 Gold Coins* Online casino that pays out in cryptocurrency* Dynamic social community
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How to Play Online Slots

To get started playing the best online slot games, here’s what you need to do. 

First, you need to choose a reputable online casino that has the slot games that you are looking for. Especially if you are new to slots, we recommend choosing a casino that has a good welcome bonus (so you can try the games for free), and a wide variety of slot games. 

Second, once you’ve chosen a casino, create an account. Be ready to provide personal information such as your full name, age, email, and physical address. Depending on the online casino that you join, you might be asked to provide additional information such as your social security number (SSN), and proof of ID for the casino’s KYC protocols. 

When you are creating an account, you will be prompted to key in a bonus code. While some bonuses and promotions do not require a code and are credited automatically, others do, so make sure that you have it handy. If you do not key in the bonus code during the account creation process, and it is required to do so, you will not be able to redeem it. 

Having done this, you should receive a message that your account is fully verified. Now, you can proceed to make a deposit through your favorite method. In a section below, we will cover the most popular deposit and withdrawal methods that online slot casinos offer to customers. 

Next, browse through the casino’s selection of slot games, and choose the one that appeals to you the most. Most online casinos will let you filter their slot games by themes, features, or software providers. 

Once you’ve chosen your preferred game, you will need to set your bet amount and choose your paylines. Become familiar with the game’s paytable, as this is where you can see how much each item pays you and how many items you need to win. 

The bet amount is the total amount of money that you are wagering. When playing slot games, this amount is per spin. Most slots will either have a coin value or a bet level. Coin value is how much each coin is worth. Bet level is the number of coins you bet per active payline. For example, if you are playing with a coin value of $0.10, and your bet level is set to 5, you are betting $0.10 * 5 = $0.50 per line. 

Paylines determine your winnings. Most slots will let you choose how many paylines you want to play. However, other slots have fixed paylines. This means that you need to bet on all of them. 

If you need to adjust this, go to the “Paylines” option. It might also be listed as “Lines.” Here, be mindful that if you activate more paylines, yes, you are boosting your odds of winning, but you are also increasing your total bet per spin. For example, if you play with a $0.10 coin value, and you activate 20 paylines, your total bet per spin would be $0.10 * 20 = $2.00. 

Total Bet is the sum of your wager, considering the coin value, the bet level, and the number of paylines. If your total bet number is over what you would like to wager, adjust either the coin value, the bet level, or the number of paylines to ensure that you are only betting what you can afford.

Deposit And Withdrawal Methods

Whether you are playing at a real money casino (depositing money outright) or buying coins at a social casino, you can expect the most common payment methods to be accepted at your online slots platform of choice. 

These include:

  • Credit and Debit Cards: Visa and MasterCard are a must at most online casinos, and in addition to this, some might take payments with American Express, Discover, or Maestro. Always verify that the online casino accepts your preferred card prior to making an account.
  • Digital Wallets: Platforms like PayPal and Skrill are accepted by most online casinos. Others include additional platforms like Venmo and Neteller.
  • Bank Transfers: Most online casinos give you the option of transferring funds directly from your bank account. If you opt for this method, keep in mind that transactions could take longer to process compared to those done through digital wallets or credit/debit cards.
  • Cryptocurrencies: Online casinos like give you the chance to redeem your prizes via cryptocurrency, offering an alternative for players.
  • Cash: Casinos that have brick-and-mortar locations will likely permit players to make a deposit at their premises. Other online casinos, even if they don’t have a physical location, might do the same, leveraging systems like PayNearMe or others. 

As a rule of thumb, these same methods are often accepted when players choose to withdraw their winnings. At Lines, some basic tips that we recommend when assessing an online casino’s payment compatibility are:

  • Pay attention to the online casino’s withdrawal processing times, and steer clear of those casinos that have excessively long times or vague statements
  • Ensure you understand the verification process that you will need to go through in order to access your winnings
  • Digital wallets like PayPal and Skrill often have the fastest withdrawal times, and you can expect money withdrawn via these methods to instantly reach your account, once the online casino has approved the transaction

As a last note, check for customer reviews before signing up for an online casino to play slot games. Generally, disgruntled players who are not able to withdraw their winnings will turn to the reviews section of both the App Store and Play Store to express their frustration.

Best Tips to Use Online Slots

Before we get into the best tips to play online slots, let’s remember one thing: the goal is to have fun. 

Yes, it can be lucrative, and what’s better than making money doing something you enjoy? However, for it to remain an enjoyable experience, keep in mind the following tips. 

Practice, practice, practice. Remember that most online casinos have a welcome bonus, so use this to become familiar with your favorite casino games. This will help you understand how the different casino games work, so that when you are playing with real money, you know what each icon and feature means. 

Understand randomness. Online slots use Random Number Generators (also known as RNGs) to determine outcomes. This means that every spin is independent of the previous one. Keep this in mind. Opposite to strategy and skill games like blackjack or poker, slots are completely random, and there’s nothing you can do to influence the result. Therefore, have fun and relax. 

Only use reputable casinos. We at provide recommendations only for carefully vetted online casinos that comply with high standards of safety, security, and reliability. We also look at players’ reviews and promptly remove from our listings any online slots casino that becomes notorious for not honoring payouts. 

Manage your bankroll. Like with every other casino game, playing slot games will require you to manage your bankroll. This includes keeping track of your wins, your losses, and adjusting your bet size based on your budget. If you place a few big bets at the very beginning, you might find yourself running out of funds quickly. 

If you are chasing big wins, go for progressive jackpots. Online slot games that have progressive jackpots are known for offering larger wins. Examples include popular slot games like Mega Moolah and Mega Fortune. 

Following these tips can keep your experience fun and engaging, so that you can fully immerse yourself in all that online casinos have to offer.

Pros And Cons of Playing Online Slots 

Here are the positives and negatives when it comes to online slots. Ideally, they can help you jumpstart your online slots player journey and avoid potential pitfalls.

Pros of Playing Online Slots

Convenience: A key advantage of playing online slots is that you can do so from the comfort of your home, or really, from anywhere, as long as you have an active internet connection. This means that you don’t have to leave your house to go to a brick-and-mortar casino to play your favorite slot games. 

Variety: Most online casinos–both real money casinos and social casinos–make a great effort to create an experience that resembles that of a Las Vegas casino. Therefore, expect online casinos to offer plenty of options and exciting games. 

Bonuses and Promotions: Because the field of online casinos is so competitive, many sites provide generous bonuses and promotions to both new and existing customers. These include welcome bonuses, free spins, and other rewards. By playing online, you have these bonuses and promotions available at your fingertips. 

Free Play Opportunities: Especially with the emergence of social casinos, it has never been easier to play your favorite online slot games for free. This is a great opportunity for you to “test the waters” without putting any real money on the table. 

Social Communities: If there is one feature that online social casinos are known for, it is their thriving communities. is particularly known for this. A buzzing community can help you spin the reels with confidence and thrive at your favorite online slot games. 

Flexibility: In general, online casinos offer more flexibility in terms of bet size, paylines, and other factors in comparison to land-based casinos. 

Opportunity to Win Big: By offering features like progressive jackpot slots, online casinos give players the opportunity to win big and take home life-changing prizes. 

Cons of Playing Online Slots

Flip Side of Convenience: Because playing at your favorite online casino can be so convenient, they can become addictive. Therefore, it is key that you set the appropriate limits to ensure you are gambling responsibly, as otherwise you could experience deep financial and emotional issues. 

No Guarantee of Winning: While we at love to help you out and boost your odds of winning at any online gambling experience, the reality is that there is no perfect recipe for success. Just as you can win money, you can also lose money, so keep that in mind before you start betting. Only play what you can afford to lose. 

No Physical Interaction: Yes, online slots are fun, but for some people, nothing beats the feeling of spinning the reels of a traditional slot machine, and being immersed in that unique casino experience. 

Time Flies: If you are not careful, your whole afternoon will have blown by before you know it. Therefore, exercise prudence when playing at an online casino. Just as you set a financial limit to the amount of money that you are willing to bet, set a time limit.

Where are Online Casinos Legal in the U.S.

Since the U.S. federal government granted authorization to states to legalize sports betting and online gambling (including online casinos) in their jurisdictions, the regulatory landscape has been evolving on an ongoing basis. 

There are two types of casinos operating in the country, and they are regulated differently. 

In the first group, we find online real money casinos, such as Caesars, FanDuel, BetMGM, and bet365. In this type of casino, you are depositing real money into your account, and using that money to play and win more real money in return. These casinos are legal in Connecticut, Delaware, Michigan, New Jersey, Pennsylvania, Rhode Island (launching in 2024), and West Virginia. 

On the other hand, social casinos are online platforms in which you are not required to make an initial deposit. Upon joining, a social casino will give you some credit–usually known as gold coins and sweeps coins–which you can use to play a variety of games. While gold coins are typically used for free play, sweeps coins enable you to participate in sweepstakes contests that offer real money prizes. 

Social casinos are available in most states, with the exception of Hawaii, Utah, and Washington. However, as new social casinos emerge, we suggest staying on top of the relevant rules and regulations, as some states are designing laws to prevent certain social casinos from operating within their territory.


Can I play online slots for real money? 

Yes, you can play online slots for real money. To keep your money safe, we suggest only playing with casinos that have been vetted by 

What is the No. 1 real money online casino? 

It depends on what you are looking for. At, we recommend casinos that cater to a wide array of tastes and preferences. 

Are online slots legal? 

It depends on your jurisdiction. For U.S. players, there are many states in which online slots are available. However, stay up to date with any legislative changes to ensure that you stay on the right side of the law. 

Are online slot machines safe? 

Yes, online slot machines are safe, as long as you are playing with a reputable casino that is licensed and regulated. 

Can you win money on free slot apps? 

Some social casinos offer free slot apps where, although you are playing for fun, you eventually get the chance to enter sweepstakes contests, where you can win real prizes that can be exchanged for money. 

What online slots win the most? 

Some popular slots include Mega Joker, Gonzo’s Quest, and Starburst. And while there is no guarantee of success, some online slot features that can help you win prizes include progressive jackpots and bonus features like free spins and multipliers. However, as we always emphasize, play responsibly. 

Is playing online casino slots possible on mobile? 

Yes, it is possible for you to play online casino slots on mobile devices. Most online casinos either have mobile-friendly versions of their websites or dedicated mobile apps with exclusive promotions.

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