VPNs are advertised everywhere, often with big promises about total privacy and anonymity. The reality is more modest, but a good VPN is still a useful tool. It encrypts your connection, hides your IP address from the sites you visit and protects you on public Wi-Fi. In this guide, I'll explain what a VPN is, how it works, what it can and can't hide, and how to choose a trustworthy one in 2026.
What is a VPN?
VPN stands for virtual private network. A VPN app creates an encrypted tunnel between your device and a server run by a VPN provider, your employer or yourself. Websites and online services then see the VPN server's IP address instead of the one assigned by your home, mobile, hotel or office network.
There are two main kinds. Consumer VPNs, the ones you see in ads, are mostly used for privacy, safer public Wi-Fi, changing your apparent location and reaching your home network while traveling. Corporate VPNs let employees securely access internal company systems, such as file shares and business apps, from outside the office.
How does a VPN work?
When you turn on a VPN, the app first connects to a VPN server and agrees on encryption keys with it. From then on, your device encrypts the traffic covered by the VPN and sends it through the tunnel to that server.
The server decrypts it and passes it on to the website or service, and replies come back the same way. Your internet provider or the owner of the Wi-Fi network can see that you're connected to a VPN and how much data you use, but not which sites you visit or what you send.
The catch is that you're moving trust, not removing it. The VPN provider now sits where your internet provider used to, and it can technically see the same connection details. That's why choosing a trustworthy provider matters more than any feature list.
What a VPN can and can't hide
This is where most of the confusion comes from, so here's a clear overview:
| Can a VPN hide… | Answer | Keep in mind |
|---|---|---|
| Your IP address from websites | Yes | Sites see the VPN server's address, but logins and cookies can still identify you. |
| Your traffic from public Wi-Fi | Yes | Only traffic going through the VPN is protected, so leave it on. |
| The sites you visit from your internet provider | Mostly | Your provider still sees that you use a VPN and how much data you send. |
| Your activity from the VPN provider | No | The provider is in a position to see your connections, so choose an audited no-logs service. |
| Your identity on sites you log into | No | Google, Facebook or your bank know it's you as soon as you sign in. |
| Tracking cookies and fingerprinting | No | Use tracker blocking, browser privacy settings and separate profiles. |
| Malware and phishing | No | Some VPNs block known bad sites, but a VPN is not antivirus software. |
| Your exact location in every app | No | GPS, Wi-Fi positioning and account history can still reveal where you are. |
When is a VPN useful?
The classic use is public Wi-Fi in cafes, airports and hotels. Most websites already use HTTPS encryption, but a VPN adds a consistent encrypted path for everything on your device and stops the local network from seeing which sites you visit.
It's also handy when traveling, because you can protect your traffic on unknown networks and connect to services back home. If you have a NAS at home, a VPN is one of the safest ways to reach it remotely without opening it up to the whole internet.
Many people also use a VPN to keep their browsing hidden from their internet provider, or to appear in another country. Changing your location can help in some situations, but streaming services actively block many VPN servers and may restrict accounts that break their terms.
If you mainly want the best streaming experience, picking the right device from our streaming devices ranking will make more difference than a VPN. For remote work, use your employer's VPN as required and don't replace it with a personal one.
VPN protocols in 2026
The protocol is the method a VPN uses to build its tunnel. WireGuard is now the default on most good services. It's modern, fast and has a small, well-reviewed codebase. OpenVPN is older and a bit slower, but it's very well tested and works on almost any network, which makes it a reliable fallback. IKEv2/IPsec is common on phones because it reconnects quickly when you switch between Wi-Fi and mobile data.
Many providers also have their own protocols, usually built on WireGuard, such as NordLynx from NordVPN or Lightway from ExpressVPN. They can be very good, but look for independent security audits. Avoid PPTP completely and treat L2TP without IPsec as outdated, since both offer weak protection by today's standards.
Is using a VPN legal?
In the US, the UK, the EU and most other countries, using a VPN is perfectly legal. A few countries restrict or ban them, or only allow government-approved services, so check the rules before you travel. Keep in mind that a VPN doesn't make illegal activity legal, and using one can still break the terms of service of some websites and streaming platforms.
Which devices support VPNs?
Every major platform supports VPNs, including Windows, macOS, Linux, Android, iPhone, iPad and ChromeOS. Most providers offer simple apps for each of them and allow several devices on one subscription. Some smart TVs and streaming boxes can run VPN apps too, mainly Google TV and Fire TV devices.
Devices that can't run a VPN app, like game consoles or many smart TVs, can be covered by a VPN on your router. A travel router like the GL.iNet Beryl AX is a neat option, because it creates your own private Wi-Fi network in a hotel and sends everything through WireGuard or OpenVPN.
The downsides of using a VPN
A VPN usually makes your connection a little slower, because your traffic takes a detour through another server. With WireGuard and a nearby server, most people barely notice, but distant servers can noticeably increase lag in games and video calls. Some websites show more captchas or block VPN addresses altogether, and banking apps may ask you to verify your identity more often.
The bigger risk is the provider itself. Free VPNs are often funded by ads or data collection, limit speed and data, or have weak security. Some dishonest apps have even been caught selling user data. A paid, audited service is a much safer choice.
How to choose a trustworthy VPN
Start with the company. Look for a clear no-logs policy that has been checked by an independent audit, an open explanation of who owns the company and where it's based, and a good track record over several years. On the technical side, you want WireGuard support, a kill switch that blocks traffic if the VPN drops, DNS leak protection and IPv6 handling.
Then look at the practical side: apps for all your devices, enough simultaneous connections, servers in the countries you need and a refund period long enough to test it properly. Be careful with lifetime deals and very cheap multi-year plans from unknown companies. A VPN is only as good as the company running it.
How to test your VPN
Before you turn the VPN on, visit an IP checking site and note your IP address and location.
Connect to the VPN and check again. You should see the VPN server's address and location instead.
Run a DNS leak test and make sure the DNS servers shown belong to the VPN provider, not your internet provider.
Turn on the kill switch, then disconnect from Wi-Fi briefly to check that traffic stops instead of leaking outside the tunnel.
Run a speed test with and without the VPN to see how much speed you lose on your nearest servers.
Can a VPN get you cheaper flights or subscriptions?
Sometimes, but much less than social media suggests. Flight and hotel prices depend on demand, currency, taxes and payment options far more than on your IP address, and prices you see from another country often aren't available with your card or billing address. Buying a subscription in a cheaper region may also break the service's terms and get your account restricted. Comparing prices in a private window is usually just as effective.
VPN vs other privacy tools
A VPN is just one piece of the puzzle. Tor offers much stronger anonymity, but it's slow and not practical for streaming or everyday use. Private DNS or encrypted DNS hides which sites you look up from your network, but not your IP address.Tracker blockers and privacy-focused browsers do more against advertising tracking than a VPN, and strong passwords with two-factor authentication matter far more for your accounts' security.
For most people, the best setup is a combination: a trustworthy VPN on untrusted networks, a privacy-friendly browser and good account security.
Final thoughts
A VPN is a useful privacy and security tool, especially on public Wi-Fi, when traveling and for reaching devices at home. It won't make you anonymous, protect you from phishing or replace secure websites, updates and strong passwords. If you decide to use one, choose an audited provider with WireGuard and a kill switch, test it properly and remember that you're putting your trust in that company.
