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Browser Inspector

A clear list of everything your browser shows to websites without asking — browser, OS, screen, language, GPU — plus support for 60+ features such as WebGPU and video codecs. Results are shown on the spot and never sent anywhere.

On-device・No upload

Your files and input are processed only inside your browser on this device and are never uploaded to our servers.

What your browser shows to websites

Most items below can be read by any website without asking you. Each is ordinary on its own, but together they form a “fingerprint” that can tell devices apart — and can be used for tracking even after you clear cookies.

Browser
OS
Device
Screen
Time zone
Language
Inspecting your browser…

Everything is inspected in your browser and only shown on screen. Results leave the page only when you copy them or save the JSON to your device.

How to use

  1. Inspection starts automatically when the page opens and finishes within seconds (no permission prompts are shown).

  2. Check the overview at the top: browser, OS, device, screen, time zone and language.

  3. The label on each row shows whether sites can read it silently, on request, or only with permission. Filter to “Visible without permission” to focus on fingerprintable data.

  4. Use “Feature support” and “Image, video & audio formats” to see whether a web feature or file format works in this browser.

  5. Export with “Copy as text” or “Save JSON” for support tickets or test records.

What it does

Shows exactly what is visible

Every row is labelled “readable silently”, “readable on request (Client Hints)” or “needs permission”, so you can see which data can be used for fingerprinting.

User-Agent Client Hints

Beyond the frozen, reduced User-Agent string, high-entropy Client Hints (detailed OS version, CPU architecture, device model) are read too — for example to tell Windows 11 from Windows 10.

60+ features and formats

APIs such as WebGL/WebGPU, WebAssembly SIMD and threads, WebCodecs, passkeys and File System Access; AVIF, WebP and JPEG XL images; H.264, HEVC, VP9 and AV1 video; Opus, FLAC and more — with hardware playback (smooth, power-efficient) verdicts.

Display details

Screen size, physical resolution, pixel ratio, color gamut (sRGB/P3), HDR, dark mode and reduced-motion preferences — everything CSS can read about your display.

Export as text or JSON

Copy as text for a support request or save JSON as a test record. Export happens only when you click.

Use cases

  • Give a support team exact browser and screen details when reporting a website problem
  • Learn how much information your browser hands to every website
  • Check through Client Hints whether you are seen as Windows 10 or 11
  • Find out if your browser supports WebGPU, AVIF or HEVC playback
  • Record a test device’s environment as JSON during web development

Capability matrix

FeatureSupportNotes
Browser, OS and device detection (UA + Client Hints)Supported—
Screen, display preferences, language, time zoneSupported—
CPU cores, memory and GPU namePartialSome browsers (Safari, Firefox) hide memory or the GPU name
Connection estimates (Network Information API)PartialChromium-based browsers only
API, image, video and audio format supportSupported—
Permission states (camera, location…)SupportedStates are only read; no permission prompt is shown
Public IP addressNot supportedWould need a request to an external server, so it is not collected
Installed fonts or extensions listNot supportedBrowsers do not expose these for safety

Limits & notes

  • Many browsers reduce the User-Agent string, so OS versions may look different from reality (detailed Client Hints are shown where supported).
  • Memory is rounded (e.g. 0.25–8 GB); some browsers also report a reduced CPU core count for privacy.
  • With anti-fingerprinting protection (Firefox resistFingerprinting, Brave…) you will see deliberately altered values.
  • “Supported” means the browser exposes the API; it may still be unusable on a given device or configuration.

Privacy & safety

Everything is inspected and shown inside your browser — never sent to a server or analytics. Results leave the page only when you click “Copy as text” or “Save JSON”. No external requests (such as IP lookups) are made.

FAQ

Can other websites see this information too?
Rows labelled “readable silently” can be read by any website without asking. “Readable on request” are details Chromium browsers hand over when a site asks. Features that “need permission” are unavailable unless you allow them.
What is browser fingerprinting?
Combining screen size, language, time zone, GPU name and similar values to recognise a device without cookies. The “canvas rendering signature” shown here is one example: identical drawing commands produce slightly different results on different devices and fonts.
I use Windows 11 but it says Windows 10 / 11
The User-Agent string cannot distinguish Windows 10 from 11. Chrome and Edge reveal it through Client Hints, which this tool uses; Firefox does not expose it.
Can I see my IP address?
Not here. A browser cannot see its own public IP address — finding it requires a request to an external server.
Are the results saved?
No. They disappear when you close the page. Use “Copy as text” or “Save JSON” if you need them.

Related tools

Keyboard Test

Each key lights up on the on-screen keyboard as you press it, so dead keys stand out immediately. Supports US and Japanese JIS layouts with numpad, and measures maximum simultaneous keys and chatter (one press registering twice).

Microphone Test

Start the mic to see input level (dBFS), waveform and spectrum. Clipping, noise and mute are detected automatically, and a guided speak test rates whether your mic is good enough for meetings. Nothing is uploaded.

Mouse & Wheel Test

Test all five mouse buttons and the wheel, and automatically catch “chatter” — single clicks registering as double clicks. Double-click interval, wheel counts, polling rate (Hz) and drag breaks are measured in numbers.

Webcam Test

Check your camera, its real resolution and frame rate in one click. If it doesn’t work, you’ll see the cause — permission, another app using it, not connected — and how to fix it. Nothing is recorded or uploaded.

Speaker Test

Press a button to play the left, center or right channel, a 20 Hz to 20 kHz sweep, or in-phase and out-of-phase noise. Every sound is generated in your browser, and the default volume is a quiet −24 dBFS.

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