Private browsing and anonymous browsing are different things. Private browsing, which Chrome calls Incognito, stops your browser keeping history, cookies and site data on your device. Anonymous browsing is a bigger goal: making your activity hard to tie back to you. A private window does not hide your IP address, and Chrome says websites, your employer or school and your internet provider can still see what you do. Last checked: 9 November 2026.
| Question | Short answer |
|---|---|
| Last checked | 9 November 2026 |
| What is private browsing? | A browser mode that does not keep history, cookies and form data on your device after you close it. |
| What is anonymous browsing? | A mix of tools and habits that make your activity hard to link to you. It is not one setting. |
| Does a private window hide my IP address? | No. Mozilla says Private Browsing does not hide your IP address or location. |
| Can my internet provider still see my activity? | Yes. Chrome and Mozilla both say a private window does not hide it. |
| Can I be fully anonymous online? | No. NordVPN says completely anonymous browsing is impossible. Treat anonymity as a scale. |
What private browsing does
A private window works like a clean desk. You use it, and when you close it the browser sweeps away what it gathered. Chrome calls it Incognito, Edge calls it InPrivate, and Safari and Firefox call it Private Browsing or a private window.
Chrome’s help page says that once an Incognito session ends, Chrome keeps no record of the sites you visited and removes cookies and site data. Mozilla says Firefox private windows control what gets saved, such as history, cookies and form data. Apple adds that Safari does not save AutoFill details. According to Microsoft, InPrivate does not save history, cookies, site data or form entries on your device.
What stays on your device
Two things survive. Chrome, Mozilla, Apple and Microsoft all say files you download stay put, and Chrome and Mozilla say the same about bookmarks you save. Microsoft says Edge keeps your favorites too.
How the main browsers compare
| Browser | Mode name | Worth knowing |
|---|---|---|
| Chrome | Incognito | Chrome Help says third-party cookies are blocked by default in Incognito. |
| Firefox | Private window | Mozilla says it does not automatically block all trackers. Enhanced Tracking Protection also runs in normal windows. |
| Safari | Private Browsing | Apple says advanced tracking and fingerprinting protection is on by default. |
| Edge | InPrivate | Microsoft says downloads and favorites are still saved. |
When a private window is the right tool
Mozilla suggests it for shared computers, for signing in to a second account while staying signed in to your main one, and for starting fresh with a site. A research article on private browsing, republished by IDM, found that most of its study participants wanted to keep activity from other people on their device, and that private mode works well for that.
Trouble starts when people expect it to hide them from the wider internet. It does not. Mozilla also notes that once you sign in to a site, the site knows who you are, private window or not.
What anonymous browsing is
Anonymous browsing means using the web so that your activity is hard to link to you. NordVPN and Windscribe both describe it as a scale, not a switch, and we agree. Nobody gets to zero.
Our way of putting the difference: private browsing tidies up on your own device, while anonymous browsing deals with what other people can see and link to you while you are online. They solve different problems.
Privacy and anonymity are not the same
Privacy is about who can read what you do. Anonymity is about whether what you do can be tied to you. A sealed letter with your name on the envelope is private but not anonymous. A note in an open box with no name on it is anonymous but not private. That picture is our own, not from a source.
What anonymous setups are made of
No single tool does it all. The sources we read describe a mix.
- A VPN. NordVPN says a VPN encrypts traffic between your device and the VPN server and swaps your IP address for the server’s. It also says a VPN does not make you anonymous to the provider, and does not stop tracking tied to your accounts, cookies or browser fingerprint.
- Tor Browser. The Tor Project says your internet provider and anyone watching your local connection cannot see the names and addresses of the sites you visit. Sites see a connection from the Tor network, not your real IP. Tor Browser also aims to prevent fingerprinting, keeps no history by default and limits cookies to one session.
- Fingerprint resistance. Apple builds some into Safari Private Browsing, and Tor Browser is designed around it.
- Staying signed out. Proton’s explainer on Tor says that logging in to a Google account in Tor Browser tells Google who you are.
Private vs anonymous browsing: who can see what
The picture below sets a private window beside Tor Browser, which is one example of an anonymous setup. The table gives the detail.
| Who or what | Private window | Tor Browser |
|---|---|---|
| Other people using your device | Cannot see your history (Chrome, Mozilla). | No history kept by default (Tor Project). |
| The websites you visit | Still see your visit (Chrome). | See a Tor connection, not your IP, unless you identify yourself (Tor Project). |
| Your IP address | Not hidden (Mozilla). | Replaced by a Tor relay’s address (Tor Project). |
| Your internet provider | Can still see your activity (Chrome, Mozilla). | Cannot see which sites you visit (Tor Project), but can tell you use Tor (Proton). |
| Employer, school or network operator | May still see your activity (Chrome). | Local observers cannot see the sites you visit (Tor Project). |
| Trackers and ads | Chrome blocks third-party cookies by default. Mozilla says not all trackers are blocked. | Cookies last one session (Tor Project). |
| Browser fingerprinting | Not the point of private mode. Safari adds its own protection (Apple). | Designed to prevent it (Tor Project). |
| The account you sign in to | It knows who you are (Mozilla). | It still knows who you are (Proton). |
A VPN sits between the two columns. It encrypts your traffic to the VPN server, so the provider takes your internet provider’s place as the party that can see your activity. That is why NordVPN tells readers to check a provider’s jurisdiction, logging policy and audits first.
The gap that ended up in court
Chrome’s help page says Incognito does not change how websites and services collect data. It also says sites that use Google services may still share information about your activity with Google, including for advertising. A US lawsuit was built on that gap. According to The Register and Reuters-based coverage, Google agreed in 2024 to delete or remediate billions of records tied to Incognito browsing, to disclose more clearly that it collects private browsing data, and to block third-party cookies in Incognito for five years. Entrepreneur reported that the class received no payment, and The Register reported that individuals kept the right to sue. Google said it never associates Incognito data with users and called the case meritless.
Which one do you need?
This is general information, not legal or security advice. The right answer depends on who you want to hide from.
| Situation | What fits | Why |
|---|---|---|
| You are on a shared or borrowed computer | Private window or Guest mode | Chrome and Mozilla say history and cookies are not kept on that device. |
| You want a fresh start with a site, or a second sign-in | Private window | Mozilla lists both as uses. |
| You want to hide browsing from your employer, school or internet provider | Not a private window | Chrome and Mozilla say they can still see it. A VPN or Tor changes what local observers see, per NordVPN and the Tor Project. |
| You want to hide your IP address from a website | A VPN or Tor | NordVPN and the Tor Project both say these replace the IP address a site sees. |
| Your safety depends on not being identified | More than any browser mode | In our view this needs a careful setup built around your actual risk. |
Some people open a private window when they compare prices. We look at that in Anonymous browsing for cheaper flights.
Can you be fully anonymous online?
None of the sources we read say yes. NordVPN says tools can blur your data trail but not erase it. Windscribe says Tor cannot protect you from an adversary who can watch both ends of a connection. Proton says a sophisticated attacker can monitor Tor traffic, though it calls that costly and unlikely to matter for most people.
Anything you type while signed in can identify you as well. So the useful question is who you want to hide from, and what that takes. For the full answer, see Is completely anonymous browsing possible.
Check what you reveal
We have not run tests of private windows for this page, so we report no results. You can run your own in a few minutes.
- Open What Is My IP Address in a normal window and note the address.
- Open it again in a private window. Mozilla says private mode does not hide your IP address, so you should see the same one.
- If you use a VPN or Tor, check again. The address a site sees should change.
For more than the IP address, run the Privacy Score Checker and read what it flags. The Browser Fingerprint Test shows how identifiable your browser is. If you use a VPN, the WebRTC Leak Test and the DNS Leak Test check whether your real details leak around it.
See what your browser reveals
Run the free checker and read what it flags about your setup.
Get Your Privacy ScoreChrome, Safari and guest mode
Chrome: Incognito and Guest mode
Chrome’s help pages treat these as two tools. Guest mode is for shared or public computers and deletes history, cookies and site data from the computer when you exit. Incognito is for private browsing on your own computer and keeps your settings. Chrome warns that neither makes your activity invisible to sites, your employer or school, or your internet provider. For more, see Guest mode vs incognito.
If you want to go beyond a private window in Chrome, see Browse anonymously in Chrome.
Safari on Apple devices
Apple says Safari Private Browsing keeps tabs separate from each other and turns on advanced tracking and fingerprinting protection by default. The Apple page we read does not mention hiding your IP address, so do not assume Safari does that. For steps on both devices, see Anonymous browsing on iPhone and Mac.
Private mode only affects what gets saved from now on. To clear what is already stored, see Delete browsing history completely.
Related guides
Terms such as fingerprinting and exit relay are explained in our Anonymous browsing glossary. The wider guide, how to browse anonymously, covers the layers that matter on any site.
This page is part of our anonymous browsing hub, which pairs each guide with a free tool.
Frequently asked questions
Is private browsing the same as anonymous browsing?
No. Private browsing keeps history, cookies and form data off your device. Anonymous browsing aims to make your activity hard to link to you. Mozilla states that a private window does not make you anonymous to websites, your internet provider, your employer or search engines.
Does incognito mode hide my IP address?
No. Mozilla is clear that Private Browsing does not hide your IP address or location, and Chrome warns that websites can still see your visit.
Can my internet provider see what I do in private mode?
Yes. Chrome and Mozilla both say a private window does not hide your activity from your internet provider.
Can my employer or school see my private browsing?
They may. Chrome says your employer, school or whoever runs the network can still see your activity in Incognito.
Is a VPN enough to be anonymous?
No. NordVPN says a VPN changes the IP address sites see, but it does not make you anonymous to the VPN provider and does not stop tracking tied to your accounts, cookies or browser fingerprint.
Is Tor Browser anonymous?
It is built for it. The Tor Project says your internet provider cannot see which sites you visit, and sites see a Tor connection instead of your IP address. Proton adds that what you type into sites can still identify you, that Tor is slower than other browsers, and that a sophisticated attacker watching Tor traffic may identify users.
Does private browsing stop tracking?
Only in part. Chrome blocks third-party cookies by default in Incognito but says it does not change how sites collect data. Mozilla says private mode does not automatically block all trackers.
Is Chrome Guest mode the same as Incognito?
No. Chrome describes Guest mode as a tool for shared or public computers that deletes history, cookies and site data when you exit. It describes Incognito as private browsing on your own computer that keeps your settings.
What we checked and what we could not confirm
We read Chrome’s help pages on Incognito and Guest mode, Mozilla’s page on private browsing myths, Apple’s Safari guide and Microsoft’s InPrivate page. For Tor we relied on Tor Project pages seen in search results, and for VPN and Tor limits on guides from NordVPN, Windscribe and Proton, which all sell privacy products. For the Google lawsuit we used coverage from The Register, Entrepreneur and Reuters-based reports.
We could not confirm two things. Apple’s page does not say whether Safari Private Browsing hides your IP address. Microsoft’s InPrivate page does not say what schools, workplaces and internet providers can see, so we make no claim about Edge there. We have not run our own tests of any browser for this page.
This page is general information, not legal or security advice. It is reviewed monthly, and the last check was on 9 November 2026.