7 Ways Websites Track You Beyond Cookies (2026)

Every time you visit a website, it stores data in your browser. Some of this is genuinely useful: keeping you logged in, remembering your preferences, making pages load faster. But a surprising amount of it is there purely to track you across the web.

What Gets Stored in Your Browser?

Your browser is a surprisingly spacious filing cabinet. Here are the main types of data websites store:

Cookies are the most well-known. They're small text files that websites drop in your browser. First-party cookies (from the site you're visiting) are mostly harmless and keep you logged in and remember your settings. Third-party cookies are the problematic ones: they're placed by advertisers and tracking networks to follow you from site to site.

Local Storage is like cookies but bigger. Sites can store megabytes of data here, far more than the 4KB limit on cookies. While local storage can't be read across domains the way third-party cookies can, it's still frequently used to store user identifiers and tracking tokens.

IndexedDB is a full database built into your browser. It's designed for complex web apps like email clients or document editors, but it's increasingly used to store persistent tracking identifiers that survive cookie clears.

Cache Storage holds copies of resources like images, scripts, and API responses. It's primarily a performance tool, but cached scripts can contain tracking logic that persists even after you clear your cookies.

How Trackers Actually Work

A typical tracking setup works something like this:

1. You visit a news website
2. The site loads a third-party analytics script
3. That script reads or sets a tracking cookie
4. The same script is running on thousands of other websites
5. The tracker now knows you visited all those sites

Modern trackers have gotten more sophisticated. Some use fingerprinting, which involves collecting details about your browser, screen resolution, installed fonts, and hardware to create a unique profile that follows you without needing to store anything at all.

Others use CNAME cloaking, where a tracking domain masquerades as a first-party domain to bypass ad-blockers. And link decoration (adding tracking parameters like ?fbclid= or ?gclid= to URLs) lets platforms know exactly where you came from.

Why This Matters

The data collected about you is used to build detailed profiles. These profiles influence the ads you see, the prices you're offered, and in some cases, the content that gets surfaced to you. Data brokers buy and sell these profiles, so information collected on one site can end up in the hands of companies you've never interacted with.

Beyond advertising, tracking data has been used in less expected ways, such as being sold to insurance companies, law enforcement, and political campaigns.

What You Can Do

The most effective steps are:

• Use a tracker blocker: browser extensions that block known tracking domains at the network level
• Regularly clear your stored data: especially cookies and local storage, which removes tracking identifiers
• Know what's stored: tools like Permission Trail let you see exactly what data each site has saved in your browser so you can make informed decisions about what to keep and what to delete

Understanding what's happening in your browser is the first step to taking control of it.