Free Online Slots Play the Best Free Slots

 Fruit Machines

Fruit machines are some of the most basic free online slots you can find, as they, by definition, aren't able to attract players with beautiful graphics or licenced characters - instead, they aim for simplicity. Most casino games are anything but simple, and even when you're not dealing with games that require strategy, you probably have a lot to keep in mind. With fruit machines, though, there aren't any bonus games or weird paylines. Just you and the reels!

 5 Reel Slots

These are the most popular slot games, and the kind that you're most likely to encounter while looking for best free online slots. They have beautiful graphics and animations and, more often than not, come with special features to make them more attractive. Free slot machine games like "Gonzo's Quest" have puzzle elements in them, while others like "Street Fighter II" offer bonus games with free spins. That makes them very entertaining to play!

 Progressive Jackpot Slots

Most popular online slots will reward you with some kind of jackpot for hitting a lucky combination, but the vast majority of times (especially for online free slots) that jackpot is set in stone, and everyone who triggers it will win the exact same amount. Progressive jackpots, on the other hand, accumulate over time and consist of a percentage of all bets placed on the game, meaning that by the time it pops it'll be anywhere between several thousand and several million quid!

 Mobile Slots

Three guesses what this refers to! In this day and age, most of us spend more time on our phones than in front of a computer, and that includes where we play free slot games. As the name implies, mobile slots are ones that you can play on your phone without any issue whatsoever - just go into the mobile casino through your phone browser and enjoy some free slots, no download required! Luckily, most modern slots are playable on mobile. Mobile gaming will become the norm in the future of online slots.

 Mega Spin Slots

Stop right there - we know what you're thinking! "I love fruit machines! I love them so much that I wish I could play, like, nine of them at the same time!" Did we get it right? ... Wait, we actually did? Well, in that case, we've got the perfect free slots for you! Mega Spin slots allow you to spin multiple versions of the same fruit machine at once in order to maximize your winnings. So if you're interested in multiplying your fun nine times, there are worse ways to go!

 Multiplier Slots

As we mentioned earlier, most free casino slot games (aside from fruit machines) have bonus rounds and free spins that you can trigger by fulfilling certain conditions. Sometimes, those bonus rounds will grant you a multiplier, which increases all winnings you've gained during its activation between 2x and 10x. That way, even when you're playing free casino slot games, you could potentially make some pretty decent winnings, with some luck!

 Multi-Payline Slots

A common category of free slots - outside of fruit machines, you'd be hard-pressed to find a slot that doesn't offer anywhere between 10 and 300 paylines! A payline is essentially the line on which you need to line up the symbols in order to score a win. Everyone knows about the straight line in the middle, but what if you line them up diagonally, or in a straight line besides the middle, or in some weird zig-zag? Extra paylines help account for this!

Megaways Slots

A fairly new slot games category of slots which only started to take off in the last few years. What makes Megaways games different to regular slot offerings is that their number of paylines is actually random with each spin, as wins are influenced not just by the symbols you can directly line up, but by the configuration of all the symbols that have dropped. While regular multi-payline slots have up to 300 paylines, Megaways slots can have up to 20,000!

Starburst was created by NetEnt, the masters of free slots, so you know you're in for something truly special. Its theme by itself isn't anything special (it's reminiscent of classic puzzle games, like ones you'd find often on your phone), but it's the cool features and frequent promotions which make this one stand out. Many of the best online casinos around will give you free spins on Starburst for signing up or fulfilling certain conditions, which quickly shot it to the top of the free slot games chart!

Book of Dead is a great candidate for most popular slot not only in the UK, but quite possibly in the world - it's almost impossible to escape it! If you've ever been to a casino, either physical or online, chances are you saw the Indiana Jones-esque main character's face grinning at you sooner or later. Book of Dead is an absolute phenomenon among free slots, with its jackpots, frequent wins and overall fun, Egyptian atmosphere attracting literally millions of players around the world!

Remember when sexy vampires were everywhere? In case you forgot, "Immortal Romance" is here to remind you by telling the love story of a blood-sucking college professor and a human researcher in the form of spinning reels and jackpots... And often quite directly, as this is one of the few slots with an actual storyline read out by a narrator that you can check out while you're not lining up symbols. This little detail alone makes it one of the coolest games we've seen - no wonder it became so popular!

Another NetEnt classic, "Gonzo's Quest" is themed around a cute Spanish conquistador in search of lost treasure. Thankfully, this version of events is a little bit different from the historical one, as the ruins the titular Gonzo stumbles upon are already abandoned and crumbling - so crumbling, in fact, that any symbols you clear will vanish into thin air, allowing you to stack up further combos as you keep rolling. When it comes to free slot games, that's an offer you really couldn't refuse!

At first glance, Mega Moolah isn't anything specacular, just a free slot with a silly theme and a profound lack of bonus features. So why is it so popular? Could be marketing, could be just the cute characters, or it could be the fact that it held the world record for biggest jackpot ever won from a slot not once, not twice, but three separate times! To this day, Mega Moolah continues to sport one of the most lucrative jackpots in all of online gaming, attracting many with the promise of millions!

NetEnt have a reputation for being the best slot developers in the world, and, looking at their portfolio, it's not hard to see where they got it. Over the years they've created classics such as "Gonzo's Quest", "Starburst", "Jack and the Beanstalk" and "Street Fighter II", all of which are known for their high quality graphics, smooth gameplay and beautiful animations.

Microgaming is something of a 'jack of all trades' when it comes to online games - they're known for high quality slots, great table games and also a really great live casino which can be found in dozens of UK casinos. Some of their slot offerings include the record-breaking "Mega Moolah" and "Immortal Romance", so needless to say, they're top tier.

While Playtech put a lot of effort and care into their table and live casino games, they're mostly known for their slots. Among their offerings were the Marvel slots, a shared "universe" of slots with a single progressive jackpot accumulating between them. After Disney pulled the Marvel licence, these offerings were rebranded as Age of the Gods.

Unlike the other software developers on this list, Evolution Gaming specialize exclusively in live casino gaming. But don't assume it's for a lack of skill - rather, they've laser-focused all of their efforts into making the best live casino experience possible! And yes, they even created several "live slots", including the first one ever, "Mermaid's Fortune".

Play'N GO! aren't the most famous slot provider out there, but we can guarantee there's one game they made that you've heard of - a little title called Book of Dead and Fire Joker! It's worth noting that they've created numerous famous games, such as "Alice Cooper and the Tome of Madness", but they all bow compared to their magnum opus.

Quickspin is one of the most highly respected slot game providers, known for its exceptional quality and innovative features. Among its most popular slots are "Big Bad Wolf", "Sakura Fortune", and "Sticky Bandits", each offering engaging storylines and impressive graphics in addition to the unique re-spin and swooping reels features that add unparalleled thrill to the games.