Client Signal
Incognito Mode
Detect private browsing mode
What it detects
Identifies when the visitor is using private/incognito browsing mode. While not inherently malicious, incognito usage combined with other signals can indicate attempts to evade tracking or abuse free trials.
How it works
Uses storage quota estimation and filesystem API behavior differences to detect private browsing mode across Chrome, Firefox, Safari, and Edge.
Start identifying devices today
Free tier includes 25,000 identifications per month. No credit card required.