Private browsing mode opens a temporary window that does not save your history, cookies or form entries on your device once you close it. It is designed to keep your activity from other people who use the same computer, not to hide it from the websites you visit, your internet provider or your employer. Think of it as a tidy-up tool rather than an invisibility cloak.
What private browsing mode actually does
Different browsers use names such as private window, incognito or InPrivate, and the details vary slightly. The common behaviour is this:
- Browsing history is not saved in the normal history list after the window closes.
- Cookies and site data are kept only temporarily. They exist while the window is open, so a site can recognise you during that session, and they are deleted when it ends.
- Information typed into forms and search suggestions are not retained.
- You start without your existing cookies, so you are generally signed out of sites even if you are logged in elsewhere. This makes it handy for a clean view of a page.
Most browsers also disable or limit extensions in this mode unless you allow them, and some turn on extra tracker blocking. Check your browser’s own help page, since this is where products differ most.
What it does not do
This is where misunderstandings cause real harm, so it helps to be specific.
| Who or what | Can still see your activity? |
|---|---|
| Websites you visit | Yes. They see your visit and any actions you take, and they can record your IP address. |
| Your internet provider | Yes. It can see which domains you connect to. |
| Your employer or school network | Often yes, if the network is monitored. |
| Accounts you sign in to | Yes. Signing in links the session to your account. |
| Files you download or bookmarks you save | Yes. These remain on your device. |
| Someone with monitoring software on your device | Yes. Private mode does not defend against spyware. |
Private windows also do not stop fingerprinting, because your browser still shares the same device details. Our guide to browser fingerprinting explains why.
Good reasons to use it
Using a shared or borrowed device
If you check your email on a family computer, a private window keeps the login and history from lingering. Remember to sign out and close every private window afterwards. On truly public computers, you will want additional care, covered in our public computer safety tips.
Keeping surprises surprising
Researching a gift or a holiday in a private window stops those searches from influencing suggestions or autocomplete on your regular profile and from showing up in the history list that others may glance at.
Checking a site as a logged-out visitor
Because the window starts with no cookies, it is a quick way to see what a site looks like to a new visitor, or to sign in to a second account without logging out of the first.
Reducing personalised results
Search and shopping results are often shaped by your history. A private window gives a less personalised view, although location and other signals can still influence results.
Common myths worth dropping
“Nobody can see what I do.” As the table shows, several parties still can. If you are on a work device, assume the owner may monitor it, and follow its acceptable-use rules.
“It protects me on public Wi-Fi.” Private mode does not encrypt anything. The protection on open networks comes from HTTPS and, optionally, a VPN. Read our guide to public Wi-Fi for the realistic risks.
“It makes me anonymous.” It does not change your IP address or your identity. A VPN changes the address that sites see, but even that is not full anonymity.
“It is a security feature.” It is a local privacy feature. It does not block malware, phishing or malicious downloads, so normal caution still applies.
A few habits that make it more useful
- Close the whole private session when you are finished, not just one tab, as data is cleared when the last private window closes in many browsers.
- Do not sign in to personal accounts if your goal is to avoid being linked to them.
- Avoid downloading or saving files you would not want others to find.
- If you want ongoing tracker protection, change your normal browser’s settings rather than relying on a private window every time.
How it compares with other tools
Private mode handles traces on your own device. A content blocker handles trackers inside pages. HTTPS protects the connection between you and a site. A VPN protects traffic between your device and the VPN server and hides your IP address from sites. Each solves a different problem, and combining the ones you need works better than expecting any one of them to do everything. For a broader explanation of the trackers involved, see what cookies and trackers are.
Where to start
Use private browsing for shared devices, gift hunting and clean logged-out views, and be honest with yourself about what it cannot hide. Then spend ten minutes strengthening your everyday browser settings, which will do more for your privacy than any single window type. You can keep exploring in our Online Privacy section.
Frequently asked questions
Does private browsing hide my activity from my internet provider?
No. Your provider can still see which sites you connect to. Private mode only affects what is stored on your own device.
Is incognito mode the same as private browsing?
They are different names for the same idea, used by different browsers. The exact details can vary, so check your browser's help pages.
Can websites tell I am in a private window?
Browsers try to make private windows hard to detect, but a site still sees your visit. Do not assume a visit is hidden from the site itself.
Does a private window protect me from malware?
No. It does not scan downloads or block malicious pages, so you still need up-to-date software and careful clicking.
