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Blacklight by The Markup
Blacklight is a real-time privacy inspection tool that scans websites to reveal tracking technologies and data collection practices
verified Jul 15, 2026 · HTTP 200
CohortClass of 2026What it is
Blacklight is a real-time privacy inspection tool that scans websites to reveal tracking technologies and data collection practices. Enter any website URL to instantly see which companies are collecting your personal information and how your data is being shared across the internet.
HTTP liveness
18 probes since Jun 16Jun 16Jul 15
AliveHard-dead (404/5xx/parked)RedirectedUnverified (timeout/DNS/block)
Observed events
probes · press · GitHub- Jun 16, 2026First probe — liveAlive · 200 OK
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Pulse Indexobserved activity
482/4 signal families
Liveness40%1.00
Press30%no data
GitHub20%no data
Tranco10%0.82
Weighted observed activity · updated Jul 15
Cohort survival · Class of 2026weekly
550 products launched in 2026 · 100% still active
550 active0 sunset
Still active
100%
Median lifespan
4.9y