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.
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.
Real Score Examples
Encrypted DNS + clean headers
ISP DNS resolver detected
UIDH supercookie found
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.