What every browser knows about you

In plain words

What Every Browser Knows About You is a web tool that demonstrates the personal information websites can access through browser data and APIs. It shows users what details their browser reveals, including location, device information, and browsing capabilities. Designed for anyone curious about online privacy, the tool helps illustrate how much information is automatically shared during web browsing. It serves as an educational resource for understanding digital privacy risks.

written from the facts on this page · September 2026

From the sources

This is a demonstration of all the data your browser knows about you. All this data can be accessed by any website without asking you for any permission. Most of the data points are educated guesses and not considered to be accurate. If you are interested in this topic join the discussion on Hackernews or the discussion on Reddit . Create awareness for web privacy by tweeting about this page , or share it on Facebook , or Share via Whatsapp . This is a demo by the creator of Snapdrop: Instantly share files with devices nearby. No Setup, Nofrom webkay.robinlinus.com

• EW
  Explore what the browser exposes about youNov 2025 · neberej.github.io · ▲275

  I built a tool that reveals the data your browser exposes automatically every time you visit a website. GitHub: https://github.com/neberej/exposedbydefault Demo: https://neberej.github.io/exposedbydefault/ Note: No data is sent anywhere. Everything runs in your browser.

• 
  We got tired of asking 'What browser are you using?' and created this2012 · aboutmybrowser.com · ▲521

  Instantly detect your browser, operating system, screen resolution, and more. Get a shareable link with your browser details for support agents.

• 
  Everything a web page can learn about you, in plain EnglishSep 2026 · sessioncontext.org · ▲18

  Everything a single web page can work out about the browser, device and person that requested it — stated in plain English, with the raw values behind every claim.

• 
  What's my browser?2014 · whatsmybrowser.org · ▲121

  What browser am I using? What version is my browser? WhatsMyBrowser.org is the easiest way to find information about your browser, and share it to your designer, developer, or support rep.

• SA
  Stop asking your clients "What browser are you on?"2013 · browser-details.com · ▲93
• 
  How privacy-friendly is your site?2018 · webbkoll.dataskydd.net · ▲200

  This tool helps you check what data-protecting measures a site has taken to help you exercise control over your privacy.

• 
  SimCity, but with Permits▲887

  A free city-building game in your browser. You are the mayor. You know what the city needs. Now get it past the zoning board, the neighbors, the appeals court and the next election.

  Life & fun · 24h ago · permit.petercai.com

• IV
  I've been paying for a rural Tanzanian's education for 10 years▲778

  Life & fun · 13d ago · tanzaniaeducationproject.org

• 
  Bigwords.page – Turn any screen into a sign. The URL is the app▲728

  Turn a phone, tablet or TV into a sign. Type a message and it fills the screen: welcome signs, timers, Wi-Fi passwords and more. No app, no account, free.

  Life & fun · 14d ago · bigwords.page

• 
  Guitoro, a virtual guitar you strum with your keyboard▲573

  Play a free virtual guitar online with your keyboard or by touch. Slow songs down and see every chord, string and strum. Acoustic, classic, electric and bass.

  Life & fun · 8d ago · guitoro.com

• 
  See *almost* any carriers phone settings▲432

  Carrier settings from iPhone, Pixel and Galaxy firmware, decoded and compared: APNs, VoLTE, 5G and Wi-Fi Calling per carrier, and what each build changed.

  Life & fun · 12d ago · carrierexplode.com

• 
  The whole Solar System and every tracked satellite, live in the browser▲407

  Life & fun · 22d ago · space.bl2.net

• 
  Good Email Copy▲1,984

  Email copy from great companies.

  Growth · 2016 · goodemailcopy.com

• 
  Tesla Model 3▲1,311

  The mass market electric car by Tesla is here ⚡️🚘

  Life & fun · 2016 · tesla.com

• 
  Kite▲867

  Internet-connected programming

  Dev tools · 2016 · kite.com

• 
  Project Infinite by Dropbox▲859

  Access all the files on Dropbox without having to sync

  Work · 2016 · blog.dropbox.com

• 
  Api.ai for Facebook Messenger▲852

  The easiest way to build an FB bot. No coding required!

  Dev tools · 2016

• 
  I made an interactive Bootstrap 4 cheat sheet▲847

  Quickly find your Bootstrap classes on this interactive Bootstrap cheat sheet. It includes code samples and live preview of elements.

  Dev tools · 2016 · hackerthemes.com