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Blacklight

Loads a website and reports ad trackers, third-party cookies, keystroke capture and session recording it finds.

Artifact by The Markup

IndexedGPL-3.0★ 243Security & privacyNo sign-up

Use it

Opens themarkup.org in a new tab. Nothing to install.

You provide
Website URL
You get
Tracker and surveillance report
Account
No sign-up needed
AI
No AI: a plain tool
Your input
Not stated: check the tool's privacy notes before using private data
Price
Free to use
Made with
Hosted web tool
Source
Open source
Link check
Answered on Oct 31, 2026

About

Blacklight is a hosted web tool in the security privacy category (website privacy scan). It opens in your browser, so there is nothing to install. You provide website URL and get tracker and surveillance report. It needs no account. It is a plain tool: no AI model is involved. The source code is public on GitHub (the-markup/blacklight-collector).

Category: Security & privacy · website privacy scan

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Signals

Stars
243

Details

Auth
No auth
License
GPL-3.0
First seen
Oct 31, 2026
Last checked
Oct 31, 2026
Source
GitHub
Cite this page

Blacklight: free online tool. Agent Mart. https://agentmart.dev/artifacts/blacklight (last updated 2026-10-31)