Privacy Leak Detector
Run 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

Fingerprint checks run locally in your browser · Save a scan to diff against future runs

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

    Hit Save on the runs you care about, then re-run after switching browser, VPN or privacy setting and watch the diff.

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 a scan is only linked to your account when you click Save — that's the action that puts it into your comparison history.
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 I need to sign in?
Sign-in ties what you save to an account. The one deliberate action is clicking Save on a scan — that's how a result enters your comparison history, where you can diff it against later runs on a different browser, VPN or privacy setting.
Is the detection logic open?
Yes — the entire app is open source at github.com/qruiqai/leakish. Every check maps to a publicly documented technique you can independently verify. If you spot a false positive or missing case, open an issue.
Is it free?
Free plan includes 1 save, enough for a single side-by-side comparison. To build a larger comparison history — across more browsers, configurations or over time — Lite, Starter and Pro raise the save quota. See the pricing page.
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.
Pricing

Save the scans you want to compare. Grow the history as needed.

Save is the deliberate action that puts a scan into your comparison history. Free includes 1 save; pay only when you want to grow that history beyond a single comparison — to diff across more browsers, VPNs or over time.

  • Free

    1 save included — enough for a single side-by-side comparison between two browsers.

    Free
    • Save 1 scan to your history

  • Lite

    Pay-as-you-go: save a few scans to compare across browsers.

    $2.99/ month
    • Save up to 3 scans to your history

  • Starter

    For one person tracking fingerprint drift over time.

    $9.90/ month
    • Save up to 100 scans to your history

  • Pro

    For CLI / CI workflows that save many scans in bulk.

    $99/ month
    • Save up to 2000 scans to your history
Pricing

See what your browser is leaking right now

A full privacy report in under 10 seconds. Save the runs you want to diff against next time.

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