01 · Client-Side Web API Telemetry
Browser-Fingerprint Online Testen: Canvas, WebGL, Audio & Lokalisatie
Bekijk alle hardware- en lokalisatieparameters die via standaard JavaScript API’s zichtbaar zijn en test hoe QA-controles afwijkingen beoordelen.
SESSION DIAGNOSTIC DIGEST…
Composite Fingerprint ID
—
64-bit FNV-1a digest
Canvas 2D Pixel Hash
—
Subpixel AA & glyph probe
WebGL Unmasked Hash
—
Extensions: —
AudioContext Oscillator Hash
—
44.1 kHz DSP compressor
Live Canvas 2D Subpixel Probe (280×64 px):
Consistentiescore Omgeving: — / 100
QA-Testbank: Simulatie van Omgevingsafwijkingen
Schakel onderstaande testscenario’s in om te zien hoe de consistentiescore reageert op tijdzoneverschillen, DevTools-emulatie of WebDriver:
Aanbevelingen na uw scan
Praktische stappen op basis van uw gedetecteerde browser-, GPU- en regio-instellingen:
Gedetailleerd Overzicht van Sessieparameters
| Web API Property | Current Session Value | Diagnostic Weight |
|---|---|---|
WebGL Vendor / Renderer | … | High (GPU architecture) |
Intl TimeZone / Offset | … | High (Regional zone) |
navigator.languages | … | Medium (i18n stack) |
navigator.platform | … | High (OS family) |
Screen & PixelRatio | … | Medium (Display DPI) |
CPU Cores / Device RAM | … | Medium (Hardware tier) |
MaxTouchPoints / WebDriver | … | Input & test runner |
User-Agent | … | Baseline HTTP string |
Veelgestelde Vragen (FAQ)
Why do two identical browsers on different laptops produce different Canvas hashes?
Browsers delegate Bezier curve anti-aliasing and font hinting to the host OS graphics subsystem and GPU hardware shaders. Even a single-bit difference on an edge pixel changes the resulting FNV-1a / SHA digest.
Why check alignment between Intl TimeZone and navigator.languages?
In cross-regional QA and remote desktop workflows, mismatched system timezones and language headers frequently cause subtle date, number, and regional formatting bugs in web applications.
When is navigator.webdriver set to true?
Per the W3C WebDriver specification, browsers expose navigator.webdriver = true when controlled by automated testing frameworks such as Playwright, Selenium, or Cypress.