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Parse UTM parameters to debug Google Analytics 4 campaign tracking. Verify ga_source, ga_medium, and campaign attribution in GA4.
> Analyze incoming links.
> Splits URLs into understandable parameters.
> Paste one URL or query string per line for bulk parsing and normalization.
Publish a lightweight UTM QA widget in docs, blogs, or resource pages.
In GA4, UTM parameters populate the session_source, session_medium, and session_campaign_name dimensions. Common debugging issues: UTM parameters are case-sensitive in GA4 — Source=Google and source=google create separate entries. The last non-direct click wins for session attribution. For cross-device tracking, GA4 uses both cookies and User-ID. Use our parser to verify your UTMs are correctly structured before publishing links.
Most common reasons: 1) UTM parameters stripped by URL shorteners or redirects. 2) The landing page fires events before the UTM is processed. 3) Wrong UTM casing creating new source/medium entries. 4) Ad blockers or cookie restrictions preventing GA4 from capturing the session.
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