Tag & Cookie Sentinel

Tag & Cookie Sentinel gives you complete visibility into tracking activity on any website. It monitors when analytics tags and cookies fire, what data they send, and whether they occur before the user gives consent.

What it monitors • Tracking tags — detects when services fire on a page and what data they collect • Cookies — captures every Set-Cookie header, classifies by purpose, flags missing security attributes • Pre-consent activity — identifies any tag fire or cookie that happens before consent is recorded • PII detection — alerts when personal information appears in tag payloads

Five-tab dashboard • Overview — quick summary of tags, cookies, and pre-consent activity • Tags — filterable table showing fire counts, payloads, and PII detection • Cookies — full cookie audit with purpose, vendor, party, and security flags • Activity Feed — chronological timeline of all tag fires and cookie sets • Compliance — severity-rated cards for GDPR/CCPA compliance issues

Who it’s for Privacy engineers, compliance officers, security teams, and marketers who need visibility into how their websites track users and handle consent.

All analysis happens locally in your browser. No data is transmitted to external servers.