Browser Fingerprint

See everything a website can quietly detect about your device, browser, and hardware. Every check runs locally and nothing is sent. Not even your IP.

Your fingerprint
Computing your fingerprint...
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Data points collected

Your combination of these values is very likely unique, and the same set is visible to every site you visit. We measured all of it on your device and sent nothing.

Hardware and device

GPU vendor
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Names the maker of your graphics chip, a strong hardware identifier.
GPU renderer
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The exact graphics model, often unique enough to single out your machine.
CPU logical cores
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Core count narrows down your device class and performance tier.
Device memory
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Approximate RAM in gigabytes, Chromium only, adds another distinguishing bit.
Max touch points
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Reveals whether you are on a touchscreen and how many fingers it tracks.
Pointer
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Tells sites if you use a precise mouse or a coarse touch input.
Hover capability
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Whether your device can hover separates desktops from phones.
Battery
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Charge level and state are a re-identification signal, which is why Firefox and Safari removed this API.
WebGPU
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The next-generation graphics API exposes detailed adapter features and limits.

Screen and display

Screen resolution
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Your full screen size is a common and stable fingerprint component.
Available resolution
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Space minus system bars hints at your operating system and taskbar setup.
Color depth
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Bits per pixel adds a small but consistent identifying signal.
Device pixel ratio
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Distinguishes retina and high-density displays from standard ones.
Viewport size
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Your current window size, updated live as you resize this page.
Orientation
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Portrait or landscape state hints at device type and how you hold it.
Color gamut
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Whether your display covers sRGB, P3, or Rec2020 reveals its quality class.
Dynamic range
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HDR support distinguishes premium screens from standard ones.
Monochrome
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Flags grayscale or e-ink displays, an uncommon and telling trait.
Inverted colors
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Reveals an accessibility setting that few visitors have switched on.
Any pointer
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Whether any fine or coarse pointer exists hints at hybrid touch laptops.
Any hover
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Distinguishes devices that have at least one hover-capable input.
Display refresh
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How quickly the display can update separates screens from e-ink and print.
Display mode
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Reveals if the page runs in a tab, standalone app, or fullscreen window.
Multiple screens
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Whether your desktop spans more than one display, visible without any permission.

Operating system and browser

Browser
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The browser brand is one of the first things every site records.
Browser version
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Exact version helps target you and narrows the crowd you blend into.
Engine
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The rendering engine reveals the family your browser belongs to.
Operating system
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Your OS is a core fingerprint field and shapes how pages behave.
OS version
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Platform version adds detail that further separates your device.
Architecture
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CPU architecture such as arm or x86 distinguishes hardware classes.
Device model
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On mobile this can name your exact phone model.
Cookies enabled
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Whether cookies are allowed tells sites how they can store state on you.
Do Not Track
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Ironically, a rare Do Not Track setting can itself make you stand out.
Global Privacy Control
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A legal opt-out signal that, like DNT, also adds a distinguishing bit.
Touch support
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Whether touch events exist at all separates touch devices from the rest.
Automation
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The WebDriver flag exposes bots and headless browsers to every site.
PDF viewer
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Whether a built-in PDF viewer is present adds another small signal.
Browser plugins
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The plugin list was a classic fingerprint and still varies between setups.
Show raw user-agent string Reading...

Locale and preferences

Timezone
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Your timezone hints at your region without any location permission.
UTC offset
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The offset from UTC backs up the timezone and flags daylight saving.
Languages
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Your language order suggests where you live and what you read.
Color scheme
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Light or dark preference is a small but persistent identifying bit.
Reduced motion
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An accessibility setting that can quietly narrow down who you are.
Contrast preference
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High-contrast mode is uncommon, so it adds extra distinguishing detail.
Forced colors
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Reveals whether your OS overrides page colors for accessibility.
Keyboard layout
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The physical key mapping can hint at your region and hardware.
Calendar
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Your resolved calendar system reflects regional and locale settings.
Numbering system
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The digits your locale uses add another quiet regional signal.
Hour cycle
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A 12 or 24 hour clock preference is tied to your locale.
Number format
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How a sample number is formatted reveals locale-specific separators.
Reduced data
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A data-saver preference is uncommon, so it stands out when set.
Reduced transparency
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An accessibility preference for less transparency that adds another small signal.
Speech voices
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Your installed text-to-speech voices vary by OS and add-ons, so they fingerprint well.

Fingerprint signals

Canvas hash
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How your device draws text and shapes is subtly unique. This stays the same across sites and is hard to change.
WebGL hash
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Your GPU renders 3D scenes with tiny differences. This stays the same across sites and is hard to change.
WebGL 2.0
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Support and shader precision values vary by GPU and driver.
Audio hash
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Your audio stack processes a silent test tone in its own way. This stays the same across sites and is hard to change.
Math hash
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Tiny rounding differences in math functions vary by engine and CPU. This stays the same across sites and is hard to change.
DOMRect hash
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Text and shapes measure to slightly different sub-pixel sizes per device. This stays the same across sites and is hard to change.
CSS support hash
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The exact set of CSS features your engine supports maps your browser build. This stays the same across sites and is hard to change.
Timer precision
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How finely your browser measures time. Coarse steps reveal a privacy-hardened browser, which is itself a signal.
Fonts
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Common fonts detected from a fixed test list, a highly identifying combination. This stays the same across sites and is hard to change.

Media and codecs

Video codecs
Detecting...
The mix of formats your browser can play reflects your OS and build.
Audio codecs
Detecting...
Supported audio formats add another stable, identifying combination.
Recording formats
Detecting...
Which capture formats MediaRecorder offers varies across devices.

Storage and state

localStorage
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Persistent storage can hold an identifier that survives a page reload.
sessionStorage
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Per-tab storage that tracks you for the length of a session.
IndexedDB
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A larger database that can stash a durable tracking token.
Service workers
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Background scripts that can persist and re-identify you offline.
Cache storage
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The cache can be abused to leave a marker that re-identifies you.
Storage quota
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The reported quota can hint at how much free disk space you have.
Persistent storage
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Whether this site has durable storage that resists automatic eviction.

Together these stores can re-identify you if you clear only your cookies and leave other site data behind.

Devices and capabilities

Cameras
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Many browsers reveal the number of cameras before permission; names stay hidden until you allow access.
Microphones
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The number of microphones is visible even before you grant any access.
Speakers
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Audio output count adds yet another small distinguishing detail.
Gamepads
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Connected controllers are detectable and uncommon, so they stand out.
Available APIs
Which advanced web APIs your browser exposes is itself a fingerprint.
Permission status
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Sites can read whether permissions are granted, denied, or unset without prompting you.

What sites can ask permission for

Nothing below runs until you choose it. Each button shows what a site would learn if you said yes. Whatever you reveal stays on this page and is never sent.

Device names
With camera or microphone access, a site can read the exact make and model of each device. We ask for one at a time and stop it immediately.
Motion sensors
Tilt and acceleration readings can reveal how you hold your device and even your movement patterns.
Location
Your precise coordinates pinpoint you on a map. We display them here only, and they stay on your device and are not sent anywhere.
Typing rhythm
Type a sentence below. The way you time your keystrokes is a behavioral biometric that can recognize you with no permission at all.

Network

Connection type
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An estimate of your connection class, read without contacting any server.
Downlink estimate
Approximate bandwidth in megabits, which hints at your connection quality.
Round-trip time
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A browser estimate of recent connection latency, used as a quality hint.
Data saver
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Whether you asked for reduced data use, an uncommon and telling setting.
Connection class
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A coarse label such as wifi or cellular, read without contacting any server.

Consistency checks

Trackers compare signals against each other to spot spoofing. A mismatch does not prove anything, but it is exactly what makes a disguised browser stand out from the crowd.

Cross-checks
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Each check compares values your browser reported through two different APIs.

Your IP address and location

Most fingerprint sites show your IP and city right here. We leave it blank on purpose. Loading any page lets the server that hosts it see your IP, the same as every website you visit. But this test never looks your IP up, never displays it, and never sends your results anywhere. Everything on this page was measured on your device. We even detect WebRTC as a capability without ever using it to probe your address.

Can this page recognize you next time?

Nothing is stored unless you choose it. If you do, your fingerprint hash is kept in this browser's local storage only, and this section will tell you on your next visit whether it still matches. That is exactly how a site could follow you without cookies.

Visit-to-visit recognition
Stores only the combined hash and the date, on your device. Use the forget button to erase it at any time.

What can I do about this?

Faking these values often backfires, because a rare or spoofed setup is easier to single out, not harder. Blending in with default settings, or using a browser built to resist fingerprinting, protects you more than randomizing one signal at a time.