Best Browser Fingerprint Checkers Compared (2026)
Not all browser fingerprint checkers are equal. Some test 10 signals, others test 30. Some send your data to a server, others run 100% locally. Some were built in 2012 and haven't been updated since. This comparison cuts through the noise: here's exactly what each tool tests, what it misses, and which one you should actually use in 2026.
The Tools We Tested
Full Feature Comparison
| Feature | UNDETECT.CLUB | BrowserLeaks | Pixelscan | EFF CYT |
|---|---|---|---|---|
| Total detectors | 32 | ~20 | ~18 | ~12 |
| Canvas fingerprint | ✓ | ✓ | ✓ | ✓ |
| WebGL fingerprint | ✓ | ✓ | ✓ | ✗ |
| Audio fingerprint | ✓ | ✓ | ✗ | ✗ |
| WebRTC leak test | ✓ | ✓ | ✓ | ✗ |
| System fonts | ✓ | ✓ | ✓ | ✓ |
| Bot / webdriver detection | ✓ | ✗ | ✓ | ✗ |
| VM / headless detection | ✓ | ✗ | ✓ | ✗ |
| Browser spoof detector | ✓ | ✗ | ✗ | ✗ |
| Anti-FP tool detection | ✓ | ✗ | ✗ | ✗ |
| Client Hints deep scan | ✓ | ✗ | ✗ | ✗ |
| CPU benchmark (VM signal) | ✓ | ✗ | ✗ | ✗ |
| Network latency probes | ✓ | ✗ | ✗ | ✗ |
| Port scanner | ✓ | ✗ | ✗ | ✗ |
| AI fix prompt generator | ✓ | ✗ | ✗ | ✗ |
| 100% client-side | ✓ | ✓ | ✗ | ✗ |
| No data collection | ✓ | ✓ | ✗ | ✗ |
| Single-page scan | ✓ | ✗ (multi-page) | ✓ | ✓ |
| Free | ✓ | ✓ | ✓ | ✓ |
Tool-by-Tool Breakdown
UNDETECT.CLUB — Most Comprehensive (2026)
UNDETECT.CLUB is the only tool in this comparison that runs all 32 detectors in a single scan, entirely in your browser, with zero data sent to any server. It's the only tool that includes: a browser spoof detector (catches fake UAs), anti-fingerprint tool detection (tells you if Brave or Firefox RFP is protecting you), a CPU benchmark for VM detection, and an AI prompt generator that automatically creates a ready-to-paste fix prompt for ChatGPT or Claude based on your specific scan results.
The interface is designed for technical users — compact card layout, tab-grouped detections, monospace data display. Best for: VPN users, privacy researchers, developers, anti-detect browser users.
BrowserLeaks — The Veteran (Since 2012)
BrowserLeaks is the most well-known fingerprint testing site and covers most of the core categories. Its strength is depth per category — each test has its own dedicated page with detailed explanations. The weakness is that it's spread across 15+ separate pages, so getting a complete picture requires significant navigation. It also lacks bot detection, VM detection, and hasn't added newer APIs like Client Hints.
Best for: Going deep on one specific signal category. Not ideal for a quick overall audit.
Pixelscan — Anti-Detect Browser Focused
Pixelscan is designed specifically for the anti-detect browser market (Multilogin, AdsPower, Dolphin, etc.) — tools used in multi-account marketing and web automation. It checks for consistency between signals (does your timezone match your IP? does your WebRTC IP match your proxy IP?). The downside: it sends your fingerprint data to their server for analysis, which is ironic for a privacy tool. No audio fingerprint detection.
Best for: Testing whether an anti-detect browser profile looks consistent. Not for general privacy testing.
EFF Cover Your Tracks — Good for Beginners
Created by the Electronic Frontier Foundation, Cover Your Tracks is excellent for explaining fingerprinting to non-technical users. Its unique feature is comparing your fingerprint against a database of millions of other browsers to give you a rarity score. However, it only tests ~12 signals, doesn't include WebRTC, and was last updated in 2022.
Best for: Introducing fingerprinting to people new to the concept. Not comprehensive enough for technical users.
Which Tool Should You Use?
Frequently Asked Questions
Try UNDETECT.CLUB — 32 Detectors, Free
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