What Incognito Mode Actually Does (and What It Doesn't)

Surveys repeatedly find that a large share of people believe private browsing hides them from websites, from their employer, or from their internet provider. It does none of these things.

What it does is narrow and genuinely useful — once you know what it is.

What it does

Incognito is a local records feature. During an incognito session, the browser does not:

• Add pages to your browsing history.
• Keep cookies after the session ends.
• Retain data websites stored locally.
• Save form entries or search-bar suggestions.

Close the session and it is as if that browsing never happened on that device. That is the entire feature.

What it does not do

It does not hide you from websites

Every site you open sees your IP address, browser, and everything you do on it — exactly as in a normal window. Sign in to an account and the site knows precisely who you are. Incognito changes nothing about this.

It does not hide you from your employer or school

Network monitoring happens on the network, not in your browser. A managed device may have monitoring software that sees more still. Incognito is invisible to both.

It does not hide you from your ISP

Your provider sees the domains you connect to regardless of the browser's local settings.

It is not a VPN

No traffic is routed anywhere different. Your IP address is unchanged.

It does not block trackers or ads

Trackers load normally. Within a single session they can still follow you between sites; the session cookie simply does not persist afterwards.

It does not make you anonymous

Browser fingerprinting — the combination of screen size, fonts, time zone, hardware — works the same in incognito.

The downloads exception

Files you download during an incognito session stay on your device after it closes. The download is not recorded in history, but the file is right there in your Files app. This surprises people regularly.

Bookmarks you create also persist. Only the automatic records are discarded.

When it is genuinely the right tool

• Shared or borrowed devices — a library computer, a friend's phone, a family iPad.
• Signing into a second account without logging out of the first. Incognito gets a separate cookie jar, which is the single most practically useful thing about it.
• Shopping for a gift on a shared device.
• Testing how a site looks to a logged-out visitor.
• Checking whether a site behaves differently without your accumulated cookies — useful for comparing prices, though effects here are often overstated.
• Not leaving a health or personal search in the history on a device others use.

When it will not help

• Hiding activity from an employer or school.
• Avoiding tracking by advertisers over time.
• Concealing anything from the site you are using.
• Bypassing a network block.
• Anything where being identified would carry a serious consequence.

For that last category, incognito is not the tool and nothing in a normal browser is. Be realistic about the threat you are addressing.

On iPhone

Most iOS browsers offer a private mode, including Sqrl Browser, where an incognito session is not added to the browsing history on the device. Bookmarks and history in that app are stored locally with no account and no sync — so they stay on the device, and are gone if the app is deleted.

Worth knowing: some browsers keep private tabs open across app launches. If discretion is the point, close them deliberately rather than assuming they cleared themselves.

For a fuller picture of who sees what, browser privacy basics maps each observer to the tool that actually addresses it.