What is Web3, and why does everyone in crypto keep talking about it? Web3 is the proposed next stage of the internet, where apps run on blockchains and peer-to-peer networks instead of company-owned servers, so users rather than platforms own their data and digital assets. Parts of it already work, while much of it is still being built.
What is Web3?
Web3 is a decentralized version of the internet built on blockchain technology, where people and apps exchange value and information through tokens instead of going through a company that sits in the middle. The core shift is ownership: data and digital assets that big tech platforms hold today would belong to the people who create and use them.
Packy McCormick described Web3 as “the internet owned by the builders and users, orchestrated with tokens.” Tokens are central to this vision. Built on blockchain technology, they can represent money, ownership, or information, allowing people to exchange value directly without relying on a centralized platform to facilitate every transaction or collect a fee.
Gavin Wood, co-founder of Ethereum, introduced the term Web3 in 2014 to describe a decentralized internet built on blockchain technology. The idea stems from a fundamental concern about the traditional internet: users entrust vast amounts of personal data to a small number of private companies and must rely on those companies to manage it responsibly. Web3 aims to change this model by distributing control across decentralized networks, reducing dependence on any single company or intermediary.
You’ll see the name spelled two ways, Web3 and Web 3.0, and even analyst firms switch between the two.
It also helps to know what Web3 isn’t. It’s not a single product, app, or network. It’s a stack of technologies that together decentralize information, and there’s no universally accepted definition of where that stack begins and ends. Much of it is still under development and partly theoretical, so when a company says it’s “building Web3,” the useful follow-up question is which piece of the stack it actually means.
From Web1 to Web3: how the web evolved
The web has gone through three eras, and the simplest way to tell them apart is by what you can do: read, then read and write, then read, write, and own. Each shift arrived gradually, with no single launch day to point to.
| Feature | Web1 | Web2 | Web3 |
|---|---|---|---|
| Rough dates | 1989 or 1990 to 2004 or 2005 | 2004 or 2005 onward | Term coined in 2014; still emerging |
| What you can do | Read | Read and write | Read, write, and own |
| Typical page | Static pages and links | Social feeds, profiles, comments, personalized recommendations | Decentralized apps (dApps) connected to a blockchain |
| Who holds the data | The site’s webmaster | Company servers and central databases | A shared ledger maintained by many nodes |
| Core technologies | HTML, CSS, HTTP, URI | HTML, CSS, and JavaScript front ends; Node.js, Java, Python, and Go back ends | Blockchain ledger, smart contracts, decentralized virtual machine, dApp front end |
| How money moves | No built-in payments (a planned capability was never implemented) | Advertising funded by user data | Tokens paid directly between users |
Web1: the read-only web
Tim Berners-Lee invented the web in 1989 while working at CERN. He wrote HTML to display content and HTTP to move files from servers to browsers, and he programmed the first browser himself.
Using the web back then mostly meant reading. Pages were static, so you read the content and clicked links, with no way to comment, post, or interact. Only a webmaster could update a page or manage users.
Web2: the read-write web
Social media drove Web2. For the first time, ordinary users could post content, comment, build profiles, and interact with each other instead of just reading. JavaScript and CSS made personalized sites possible, which is how you got Facebook’s news feed and Amazon’s product recommendations.
Under the hood, a Web2 app like Twitter runs in three parts: a front end written in HTML, CSS, and JavaScript; back-end code in languages such as Node.js, Java, Python, or Go; and a central database. All three sit on servers the company owns. That design is exactly what Web3 sets out to change.
On a Web2 platform, the catch is ownership: the company owns what you post and what it learns about you, and it can sell that data or target ads with it without asking you. Advertising makes up the large majority of Google’s revenue, which explains why the biggest platforms give their services away for free: you’re paying with your data.
Centralizing all that data creates two more problems. Large central databases attract breaches, and they can be misused by companies or governments with their own agendas. Platforms can also change their rules whenever they like, which exposes businesses and individuals to higher fees and to platform risk, the danger that a single policy change wipes out your reach or your income. Web2 ended up as the era of closed platforms that profit from user data while leaving users out of the cash flow.
Web3: the read-write-own web
Web3 adds ownership and execution to the mix, a token economy built on read, write, own, and execute. Instead of trusting a company to run an app, you rely on code running across a network, which removes trusted third parties on a global scale. No central database or single company holds the app’s data or its back-end logic.
This is what people mean by a “trustless” system. Businesses, people, and even machines can exchange value and information without needing to trust each other, because the network’s rules verify every exchange.
In spirit, Web3 goes back to Web1’s ideal of an open web. The difference is reach: Web3 extends beyond the browser to phones, connected TVs, game consoles, and VR headsets. Its signature areas so far are DeFi (decentralized finance) and the metaverse, both covered below.
How Web3 works
HTML still lays out the pages you see, so a Web3 site doesn’t look radically different on screen. What changes is where the data lives and how pages connect to it. Most Web2 apps lean on a centralized database; a Web3 app swaps that for a decentralized blockchain with no central authority.
The Web3 stack has four layers:
- Open blockchain ledger. Nodes maintain the ledger peer to peer and agree on its contents through consensus protocols. No single entity owns it, and anyone can read from it or write to it.
- Smart contracts. These hold the app’s rules, the part a Web2 app would keep in back-end code on company servers.
- Decentralized virtual machine (DVM). The DVM runs smart contract logic and processes the resulting changes to the ledger.
- dApp front end. This is the interface you actually use, built with familiar web tools.
Put side by side with the Twitter example above, the mapping is straightforward: the back end becomes smart contracts running on the DVM, and the central database becomes the shared ledger.
How do I access Web3?
You don’t need a special browser to access Web3. Web3 sites open in the same browser you already use, and although they run on blockchain software, you reach them much like any ordinary website: type an address or click a link.
The main thing that changes is how you sign in. Instead of creating a username and password, most dApps ask you to connect a self-custody crypto wallet. When you connect, the wallet signs a message that serves as cryptographic proof you control that wallet address, so the wallet works as both your login and your account. Since there’s no company holding your account, there’s usually no “forgot password” link either, so keeping your wallet’s recovery details safe is on you.
Metaverse platforms are another way in, giving you a 3D space to interact with Web3 apps and assets rather than a flat web page.
Core Web3 technologies
Web3 combines several building blocks: blockchain, cryptocurrency, NFTs, dApps, smart contracts, DAOs, and DeFi. Blockchain is the base the others run on.
There won’t be just one blockchain. Many will exist side by side, and cross-chain bridges connect them so data and tokens can move from one chain to another.
Blockchain
A blockchain is a shared record of transactions that a network of distributed participants, called nodes, validate together. Transaction data sits in blocks linked into a chain, and each block holds a cryptographic hash of the block before it.
Those hash links are what make the record tamper-resistant and, in theory, immutable. If someone alters an old block, its hash changes and no longer matches the link stored in the next block, so the rest of the network can see the record was tampered with.
Anyone can view the full transaction history, a level of transparency traditional databases don’t offer. Not every blockchain is decentralized, though; some are largely centralized. Web3 relies on decentralized, permissionless chains such as Bitcoin and Ethereum.
Cryptocurrency
Cryptocurrency is digital-only money that runs on blockchains, with no government or bank controlling it. Bitcoin is the best-known example. You can pay someone directly, without a middleman and without a bank’s handling fee, and cryptography secures the creation of new units, each transaction, and every change of ownership.
In Web3, crypto works as the payment layer that lets users trade tokens and get paid directly. Supporters expect it to largely replace the fiat currency central banks issue. The track record so far is rougher: crypto prices swing sharply, and regulatory scandals have followed the market.
NFTs (non-fungible tokens)
An NFT is a unique digital asset whose ownership can be proven on a blockchain. Think of it as a verified digital collectible you can buy outright or trade. Most NFT activity happens in gaming and art.
The headline example is Beeple’s “Everydays: The First 5000 Days,” which sold for over $69 million at auction. On a more everyday level, NBA Top Shot is a marketplace where fans buy, sell, and trade basketball video clips as NFTs. Big brands have tried NFTs to open new revenue streams and keep fans engaged, but not all of those programs survived. Starbucks shut down its NFT loyalty program in 2024.
Decentralized apps (dApps)
A dApp runs on a peer-to-peer blockchain network instead of on one computer or a company server. Most are open source, so other developers can extend them after release, and each change is recorded on the ledger. No single authority decides how a dApp develops.
Because there’s no central point of failure, dApps stay accessible even if one part of the network goes down, which makes them sturdier than traditional apps. You use them inside a normal web browser.
Two well-known examples show the range. Uniswap is a decentralized crypto exchange platform. Brave Browser is a privacy-focused browser that pays you in Basic Attention Token (BAT) for viewing ads, and you can convert BAT to other cryptocurrency. One caution before you take the “decentralized” label at face value: a dApp can still be majority-controlled by a single company, a point covered in the downsides below.
Smart contracts
Smart contracts are programs that run automatically once preset conditions are met. Uses range from something as simple as releasing funds when a condition is satisfied to automating entire workflows.
Their code lives on the blockchain, so anyone on the network can audit it before relying on it. They also react to changing conditions faster than traditional contracts, since no one has to sign off on each step.
The name is misleading in one respect. Smart contracts are code, not contracts in the legal sense, and their legal status is unsettled in most jurisdictions. Don’t assume a court will treat one like a signed agreement.
DAOs (decentralized autonomous organizations)
A DAO is a management structure that no single party or group controls. Stakeholders vote on decisions, and smart contracts carry out the results. The goal is to shift power away from a few big tech companies toward self-governed communities.
Crypto tokens often carry voting rights, so holding a token can mean having a say in policy. Snapshot is a platform DAO members use to vote on policy proposals. Ethereum Name Service took this approach when it launched tokens and held a user vote on its constitution.
DeFi (decentralized finance)
DeFi lets you buy, sell, and borrow without approval from a bank or other intermediary. Users pool money to make loans, and anyone in the world can take part. Aave and Compound are two well-known lending platforms that work this way.
Pooling has gone beyond loans. Through platforms like KlimaDAO and PartyBid, people have pooled funds to buy carbon credits and artwork, and one group even pooled money to bid on a copy of the US Constitution.
What Web3 means for everyday users
The biggest change for you is control. Web3 aims to hand your online identity and personal data back to you instead of leaving them with central providers. Because you own that data, it can travel with you from site to site through interoperability, so you don’t rebuild a profile from scratch on every new platform.
Owning your data could also change how advertising works: picture choosing a preset bundle of personal data, deciding exactly what goes in it, and sharing it with an advertiser in exchange for a crypto micropayment. You decide what’s shared, and you get paid for it, the reverse of the Web2 deal.
That idea has roots in the original web. Its code included a payment capability that was never implemented, and HTTP status code 402 is the leftover trace. Web3’s payment layer picks up where 402 left off, rewarding you for contributing, engaging with content, shopping, and viewing ads.
Games show what this looks like in practice. In Web3 games, in-game currencies carry real-money value, and Axie Infinity is a well-known example of a game with a real-money economy. Artists get a similar shift: they can sell NFT-backed work directly to patrons through smart contracts, on marketplaces such as OpenSea and objkt, without a gallery in between.
Web3 vs. the metaverse
The metaverse is a proposed 3D virtual world where avatars represent people as they interact and do business. Web3 is the infrastructure underneath. The metaverse relies on blockchain for its data and finances and on AI to respond to users in real time.
Extended reality (XR) is the bridge between them. It could turn flat 2D apps into 3D spaces that place you inside the internet rather than in front of it. Social media companies, notably Meta, have begun offering user-created metaverse content, and platforms such as Roblox, Meta’s Horizon, and Fortnite give a sense of where this is heading.
The downsides of Web3
Web3’s problems are real, and several of them cut against its own promises of openness and user control. Weigh these before you put money or business plans behind it:
- Complexity. Decentralized networks and smart contracts have steep learning curves for IT teams and everyday users alike, so mistakes and slow adoption are common.
- Regulation gaps. With no central authority, consumer protection and compliance rules are weak or missing, and the space is largely unregulated. If something goes wrong, you may have no one to appeal to.
- Crime. Anonymity lets bad actors move money without banks, trade on the dark web, and encrypt malicious files, which also draws regulatory heat onto legitimate users.
- Resource use. Blockchains and dApps often require expensive hardware and use large amounts of energy. Producing Bitcoin uses more electricity each year than Finland.
- Decentralization gaps. A single company can still own the majority stake in a dApp, so find out who really runs it before trusting the “decentralized” label.
- Hype relabeling. Google, Meta, and Microsoft have added blockchain features to existing products and called them Web 3.0, which blurs what the term means.
- Scams. NFT scams and crypto losses have already hit early users, and with little regulation, recovering stolen funds is often impossible.
- Tool overload. Tools for blockchain, crypto, NFTs, and smart contracts are multiplying fast, which makes choosing a technology hard for businesses and developers.
The sharpest critique comes from the web’s own inventor. Tim Berners-Lee argues that blockchains are too slow, too expensive, and too public for storing personal data. His alternative for decentralizing data is Solid, a technology that puts personal data under the user’s control without relying on a blockchain, and he founded the company Inrupt to commercialize it. If your main interest in Web3 is owning your data, Solid shows that blockchain isn’t the only proposed route.
When will Web3 fully arrive?
You won’t find anyone who can give you a firm date. Parts of Web3 already exist as blockchain apps come into real use, but with core technologies still emerging, industry analysts in 2023 placed a fully realized Web3 at least a decade away.
Some of the shift is already visible. Web assets are already being tokenized, and the move from Web1 to Web2 took more than 10 years, so Web3 is expected to take at least as long.
How to invest in Web3
The most common first step is buying a well-known cryptocurrency. If you go that route, our crypto exchange reviews compare where to buy, so you can pick a platform before you put money in.
Buying shares is harder than it sounds. Few companies that specialize in Web3 are publicly traded. Some exchange-traded funds (ETFs) group Web3 company stocks into a single fund, while other ETFs and mutual funds bundle cryptocurrencies themselves.
Don’t count Google or Meta as Web3 investments yet. Web3 is a small fraction of their business, so their stock prices move on everything else they do. Whatever vehicle you choose, remember that crypto prices swing sharply, and nothing in this space comes with guaranteed returns.
Web3 FAQs
What are Web3 crypto coins?
Web3 coins aren’t a separate class of coin. The term refers to the existing cryptocurrencies Web3 runs on, such as Bitcoin and Dogecoin. Be wary of any token marketed as a special “Web3 coin” on that label alone.
Is it worth moving crypto to a Web3 wallet?
It depends on what you plan to do with your crypto. If you want to use dApps, such as a decentralized exchange like Uniswap, an NFT marketplace, or a DAO vote, you’ll need a wallet you control, because that’s how dApps log you in. The trade-off is responsibility: you hold the keys, and if you lose your recovery details, no company can restore access. If you only plan to hold and eventually sell, moving may add risk without much benefit. Our crypto wallet reviews compare options if you decide to make the move.
Can Web3 be hacked?
Yes. Major blockchains and cryptocurrencies have been hacked despite claims that they were immune. A blockchain’s hash links make old records hard to change, but the smart contracts, apps, and wallets built around it are written by people and can carry flaws.
Web3 as the app layer of blockchain
Web3 is best understood as blockchain’s app layer. Early smartphone apps were mostly games before they changed how people used their phones, and Web3’s current focus on tokens, collectibles, and games may be a similar early stage.
Its ownership model draws on economics, art, technology, and game theory at once, which is part of why it’s so hard to define in a sentence. If that model matures, its effect on business could exceed the shifts caused by mobile, or even by the internet itself. For now, the practical move is to learn how the pieces work and test them with amounts of time and money you can afford to lose.
