September 3, 2026

What websites can see about you without asking

You are not asked. The page just reads it: language, timezone, screen, GPU, and a canvas print. That is what websites can see about you from one visit.

The automatic handoff

A visit already gives the site your IP (that is how packets return). JavaScript can add:

• Language and timezone — where you probably live, what you read
• Screen and viewport — phone vs laptop, how large the window is
• GPU name — the graphics chip WebGL reports
• Canvas print — a short hash of how this device draws text
• Cores, memory, touch — rough hardware

Together that is a browser fingerprint. Cookies are optional. Incognito does not change these values.

What it cannot see

Your name, email, photos, and files stay put unless you type them or pick a file. This is not a data-broker search and not a “what is my IP” lookup with a third-party geo API.

Check it in this tab

What websites know about you prints the live list like a terminal. The scan stays in the tab. Close it and it is gone.

Location hidden in a photo is a different leak. That is Remove Photo Metadata.