Un outil gratuit pour tester si votre FAI vous espionne
Outil en ligne gratuit permettant de détecter plusieurs techniques de surveillance réseau utilisées par les FAI : supercookies, injection de headers HTTP, détournement DNS et interception TLS. L’audit s’exécute entièrement côté client dans le navigateur, sans installation ni inscription requise....
Free browser-based privacy audit — no install needed
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.
800+ connections tested today
What We Check
Four independent checks. One privacy score.
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Header Injection
Detect UIDH supercookies, UID headers, and ISP-injected tracking tags.
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DNS Privacy
Is your DNS encrypted? Resolver fingerprinting reveals who handles your queries.
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TLS Integrity
Detect middleboxes silently intercepting your encrypted traffic.
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ISP Reputation
See how your provider stacks up in our real-user leaderboard.
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Global Test Activity
last 30 days
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Top Countries
Low risk (75+)Medium (45–74)High (<45)
Real Score Examples
92
/100
Cloudflare WARP
Low
Risk
Encrypted DNS + clean headers
58
/100
Comcast Xfinity
Medium
Risk
ISP DNS resolver detected
21
/100
Verizon Wireless
High
Risk
UIDH supercookie found
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What People Are Saying
From the community — real reactions, unedited.
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.
ismyispspying.com is an independent privacy tool. Results are informational only and not legal advice. Affiliate links help fund the project — we only recommend tools we'd use ourselves.