Privacy Leak Detector
Sign inRun a check
Privacy health check

See exactly what your browser is leaking — in one click

Eight checks across WebRTC, Canvas, fonts, DNS and more surface the fingerprints and network signals your browser is quietly broadcasting.

Run a free privacy checkSee how it works

No signup required to try · Fingerprint checks run locally in your browser

Live preview
Detecting fingerprint surface
Sample of what your scan will reveal
  • 8
    Detection modules
    Every mainstream tracking surface
  • 100%
    In-browser
    Fingerprint checks never leave your device
  • 0
    Bytes shared
    No analytics, no ads, no third parties
What we check

Eight dimensions, covering every mainstream tracking surface

Each check maps to a real-world tracking technique, scored against the latest fingerprinting research.

  • Network egress

    Probes your real egress IP, geo, ASN and TLS fingerprint — flags proxy / VPN leaks fast.

  • WebRTC leaks

    Uses STUN to surface local and public IPs and mDNS candidates, the classic VPN-bypass.

  • Browser fingerprint

    Scores the uniqueness of your UA, screen, timezone, plugins, CPU, memory and more.

  • Canvas / WebGL

    Detects the high-entropy fingerprint from Canvas 2D and WebGL rendering differences.

  • Audio fingerprint

    Reads the AudioContext rendering signature used to track you across browsers and devices.

  • Font identification

    Measures Canvas text widths to probe the installed font set — rare fonts spike entropy.

  • DNS health

    Checks DoH reachability, DNSSEC, resolver location and common leak heuristics.

  • Automation detection

    Spots whether the browser is driven by Puppeteer, Selenium, headless Chrome or similar.

How it works

Three steps to a full readout

  1. 1

    Hit "Run all"

    Every detection runs locally in your browser. The server only handles the egress IP probe.

  2. 2

    Read the score

    You get a 0–100 privacy score plus per-check critical / warning / safe verdicts.

  3. 3

    Save to history

    Sign in to save scans and compare different browsers, VPNs and configurations side by side.

FAQ

Before you hit run

Do you collect my browsing data?
All fingerprint checks run locally in your browser. Only the egress IP probe goes through our server, and it is never linked to an account unless you actively sign in and save a scan.
How accurate are the results?
Every check is scored against the published fingerprinting-entropy research. The aggregate score is a relative indicator — it is most useful for comparing browsers, profiles and VPN configurations against each other.
Why do some features require sign-in?
Scan history, API keys and saved comparisons need to be tied to an account. Without signing in you still get the full detection pass — only persistence and side-by-side comparison are gated.
Is the detection logic open?
Every check maps to a publicly documented technique that you can independently verify. If you spot a false positive or missing case, we want to hear about it.
Is it free?
All detection features are free for individual use today. If we ever launch a team tier (quotas, API usage, automation hooks) we will publish pricing separately.
Can I plug it into automation?
Yes — once signed in you can mint API keys on the Integrations page. Every /api/detect/* endpoint accepts Bearer auth.

See what your browser is leaking right now

A full privacy report in under 10 seconds — no signup needed to try.

Run the privacy check