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An antidetect browser is a browser that runs many separate browser profiles on one computer, where each profile looks to websites like a different device. Every profile has its own browser fingerprint, its own proxy and its own cookies and storage, so accounts opened in different profiles do not share anything a website can use to connect them.
The name is a little misleading. A good antidetect browser does not hide that you use a browser. It makes each profile look like an ordinary, consistent browser on its own computer, which is a different and more useful goal.
Why ordinary browsers link your accounts
When you log into two accounts from the same Chrome window, the website can connect them in three ways.
- Cookies and storage. Cookies, localStorage and cache survive log-outs. A site that sets an ID in one account can read it back in the next.
- The browser fingerprint. Your browser reports dozens of values: user agent, screen size, timezone, installed fonts, graphics card, and the exact way it draws canvas images. Together these are often unique, and they are identical for every account you open.
- The network. Every account comes from the same IP address. Even behind a proxy, WebRTC can leak your real IP.
Chrome profiles and incognito windows solve the first problem only. A separate computer solves all three, but you cannot buy a computer per account.
How an antidetect browser works
An antidetect browser creates a profile for each account. A profile is a saved browser identity made of:
| Part | What it contains |
|---|---|
| Fingerprint | User agent, client hints, screen, hardware, fonts, WebGL, canvas and audio values |
| Network | A proxy, plus timezone, language and location that match the proxy’s IP |
| Storage | Its own cookies, localStorage, IndexedDB, cache and service workers |
When you open a profile, the browser starts with those values and that storage. When you close it, the storage is saved, so you stay logged in next time. Two profiles running side by side share nothing.
Changing the fingerprint properly
There are two ways to change a fingerprint, and the difference matters.
- JavaScript injection overrides values with scripts or extensions. It is easy to build, but sites can detect the patched functions, and the values often disagree with each other.
- Engine-level changes modify the browser itself, so the page sees native values with nothing to inspect. Workers, iframes and the main page all report the same thing.
Consistency matters more than randomness. A profile that claims to be a Mac but lists Windows fonts, or reports a graphics card that never shipped in that OS, stands out more than an unmodified browser. You can check your own browser with our fingerprint test, which runs the same consistency checks.
Who uses antidetect browsers
- Social media agencies that run accounts for many clients and share them across a team.
- E-commerce sellers who operate several storefronts where the marketplace allows it.
- Affiliate and ad teams who keep ad accounts apart and check campaigns from other countries.
- Developers and QA teams who need real, persistent browser sessions for automation.
- Privacy-minded people who want to stop sites tracking them across contexts.
See the use cases for how each of these works in practice.
What to look for when choosing one
- A current browser version. An antidetect browser that lags months behind Chrome is itself unusual. Ask how quickly the vendor ships Chrome updates.
- Consistent fingerprints. Profiles should be generated from one coherent device, not from independent random values.
- Network protection in the browser. WebRTC and DNS should follow the profile’s proxy.
- Real isolation. Every kind of storage should be separate, including service workers and IndexedDB.
- Team features if more than one person works on the accounts: sharing, roles and hand-over without passwords.
- Automation through standard tools such as Puppeteer, Playwright and Selenium.
- Honest marketing. No tool is “100% undetectable”. Websites also judge behaviour, IP reputation and account history. Be careful with vendors that promise otherwise.
The short version
An antidetect browser gives each account its own browser, with its own fingerprint, network and storage, on one computer. It removes the technical reasons accounts get linked. It does not replace good proxies, sensible behaviour or following each platform’s rules.
NexLogin is an antidetect browser built around consistent fingerprints, per-profile proxies and team sharing. It runs on Windows, and every new account gets a 7-day free Pro trial.