Cover Your Tracks

Cover Your Tracks

coveryourtracks.eff.org · Verified Sep 17, 2026 ·
Open Tool

Description

Test how well your browser protects you from tracking. By the Electronic Frontier Foundation (EFF).

No-Login Task

"Test browser tracking protection"

Editorial Review & Verification

Hands-on Verified
Best For

Privacy advocates, security researchers, and everyday users auditing their browser tracker blocking and fingerprint uniqueness

No-Login Alternative To: AmIUnique BrowserLeaks Device Info

+ Key Strengths (Pros)

  • ✓ One-click browser fingerprinting and tracker-blocking test requiring zero login or credentials
  • ✓ Provides precise information entropy calculations compared against 318,759 real-world tests from the past 45 days
  • ✓ Operated by the non-profit Electronic Frontier Foundation with zero commercial advertising or surveillance monetization

− Limitations (Cons)

  • − Does not provide an automated JSON or CSV export button, relying on URL parameters or browser printing
  • − Mathematical entropy metrics may require background reading for non-technical users

Deep Privacy & Sandbox Audit & Product Power & Utility Review

🛡️ Audited & Certified by NoLoginTools.org
A
Privacy Grade
High-Assurance Privacy
Security & Sandbox Index
83 / 100
Data Sandbox & Storage Isolation 14 / 25
Zero Trackers & Telemetry Hygiene 22 / 25
Source Transparency & Auditability 25 / 25
Availability & Infrastructure Resilience 22 / 25

Transmits anonymized client hardware and header characteristics directly to the Electronic Frontier Foundation research endpoint to calculate entropy against a public dataset, with zero third-party commercial trackers or persistent advertising identifiers.

⚡
Product Power Index
72 / 100
Capable Utility
📊 5-Dimension Performance Radar 5D CADES
Radar chart displaying 5 dimensions: Frictionless, Depth, Export, Privacy, Polish Frictionless UX: 17/20 (85%) Functional Depth & Fidelity: 13/25 (52%) Export Freedom: 15/20 (75%) Privacy & Data Sovereignty: 15/20 (75%) Stability & Polish: 12/15 (80%) Frictionless UX (17/20) Functional Depth & Fidelity (13/25) Export Freedom (15/20) Privacy & Data Sovereignty (15/20) Stability & Polish (12/15)
Frictionless UX 17 / 20
Instant start without signup, account wall, or modal traps
Functional Depth & Fidelity 13 / 25
Full core workflow completion, feature richness, and input fidelity
Export Freedom 15 / 20
Unrestricted download in standard formats with zero watermarks
Privacy & Data Sovereignty 15 / 20
In-browser memory sandbox, zero tracking egress, and data hygiene
Stability & Polish 12 / 15
Visual typography, layout ergonomics, and reliable runtime recovery
🔬 Hands-on Lab Notes Audited in 2026-09

Completed comprehensive browser fingerprinting audit across WebGL, Canvas, and Audio in 5 s; calculated 18.28 bits of identifying information against 318,759 tests with 0 commercial trackers.

Data Sandbox & Storage Isolation 14 / 25
Zero-Account Ephemeral Server
  • ✓ Temporary stateless processing without user profile retention
  • ✓ No persistent identity linking or mandatory account creation
  • ✓ Requires network connection to execute backend tasks
Zero Trackers & Telemetry Hygiene 22 / 25
Privacy-Hardened Policy
  • ✓ Audited privacy policy protecting user confidentiality
  • ✓ No mandatory email, telephone, or identity correlation
  • ✓ Strict limits on operational telemetry
Source Transparency & Auditability 25 / 25
Open Source (AGPL-3.0)
  • ✓ Publicly auditable code repository at https://github.com/EFForg/cover-your-tracks
  • ✓ OSI-recognized open license: AGPL-3.0
  • ✓ 281 GitHub community stars
Availability & Infrastructure Resilience 22 / 25
Operational & Verified
  • ✓ Tool is online and accessible
  • ✓ Monitored continuously by NoLoginTools automated prober
  • ✓ No scheduled downtime or access gating detected

NoLogin Lab™ Verified Telemetry & Empirical Audit

CADES 2.0 Empirical Test
🛡️ Network Payload Sniffing Stateless Cloud Transit

Stateless execution; no user account or tracking identifier recorded on remote infrastructure.

Audit: verified-consistent
💻 Execution Sandbox Engine Cloud Processed

Web browser environment operating without persistent account binding or cross-site tracking.

Sandbox: Client-Side Sandbox
📦 Artifact & Watermark Check Standard Formats

Functional output download verified with standard browser capabilities.

Ad Tier: zero-ads
⚡ Access Velocity & Friction Instant Launch (<500ms)

Primary operational canvas becomes interactive immediately upon URL load with zero registration intercept.

Onboarding: 0-Click Gate
📜 Source Code & Governance Public Source Repository Verified

Verified open-source repository with active developer community tracking and public codebase.

License: AGPL-3.0 GitHub Repo →

Verification Details

Account None Required
Category Privacy
Processing Browser / Web
Pricing Free
Privacy Architecture Verdict

Transmits anonymized client hardware and header characteristics directly to the Electronic Frontier Foundation research endpoint to calculate entropy against a public dataset, with zero third-party commercial trackers or persistent advertising identifiers.

Tags

Privacy ,Open Source, Free ,Web App, Privacy Focused

Health History

14 days ago → Today · Uptime: 100%

Repository

EFForg/cover-your-tracks

★ 281 ·Ⓟ 43 · JavaScript · AGPL-3.0 · Updated 12d ago

FAQ

Does Cover Your Tracks require an account?
No. Cover Your Tracks has been verified by nologin.tools to provide its core functionality — Test browser tracking protection — without requiring any login or signup.
Is Cover Your Tracks free to use?
Cover Your Tracks is listed on nologin.tools as a tool you can use without creating an account. Check the tool's own site for details on pricing or premium features.

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