Is Your ISPSpying on You?
Test for supercookies, header injection, DNS hijacking, and TLS interception — in seconds, from your browser.
🚀 Run Free TestNo sign-up. No install. 100% client-side checks.
600+ connections tested today
What We Check
Four independent checks. One privacy score.
Header Injection
Detect UIDH supercookies, UID headers, and ISP-injected tracking tags.
DNS Privacy
Is your DNS encrypted? Resolver fingerprinting reveals who handles your queries.
TLS Integrity
Detect middleboxes silently intercepting your encrypted traffic.
ISP Reputation
See how your provider stacks up in our real-user leaderboard.
Global Test Activity
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Top Countries
Real Score Examples
Encrypted DNS + clean headers
ISP DNS resolver detected
UIDH supercookie found
What People Are Saying
From the community — real reactions, unedited.
“Un outil gratuit qui teste depuis le navigateur si votre FAI vous espionne : supercookies, injection d'en-têtes, détournement DNS et interception TLS.”
A free tool that tests from your browser whether your ISP is spying on you: supercookies, header injection, DNS hijacking, and TLS interception.
“Pas mal, même avec Proton il me détecte encore une faille à combler. C'est intéressant, merci 🙏”
Not bad — even with Proton it still detects a gap to fill. That's interesting, thanks 🙏
“Après avoir respecté les excellentes consignes de sécurité. Merci pour cet outil.”
After following the excellent security instructions. Thank you for this tool.
Frequently Asked Questions
Does this store my IP address?▾
Never. Your IP is hashed with a daily-rotating salt before storage. We cannot reverse it.
How long does the test take?▾
About 5–10 seconds. All checks run directly in your browser.
What is a supercookie / UIDH?▾
Verizon and some ISPs inject a unique identifier into HTTP requests that advertisers can read — even in private browsing mode.
Will a VPN fix my score?▾
Yes — a VPN encrypts all traffic before it reaches your ISP, preventing header injection and DNS surveillance.