Privacy & Identity Library
Back to libraryCheck Cookie Domain Scope After a CMP Migration
Use cookie inspection after a CMP or tag-manager migration changes how cookies are written across the site.
Why this workflow matters
Teams use Cookie Inspector when they need to confirm that domain scope and related cookie settings still behave correctly after a CMP or tag deployment change. Migrations can move cookie behavior subtly, creating inconsistent consent or identity state across subdomains.
The search intent behind this topic is usually very specific: someone has a real debugging task in front of them and needs a practical workflow rather than a generic tool list. Cookie Inspector is the anchor tool for this page because it addresses the core evidence needed to move the issue forward.
How to investigate it
Open Cookie Inspector first and inspect the cookie attributes, compare the domain settings with the intended scope, and note which cookies are now too broad or too narrow. Supporting tools such as Cookie Sync Visualizer and TCF String Decoder help once the first clue is visible.
The goal is not just to get an answer on screen. The goal is to produce a clean explanation that can be shared with engineering, ad ops, or an external partner without re-running the entire investigation from scratch.
What good output looks like
The best result is a short list of cookie-scope issues that explains the cross-site behavior users are actually seeing.
This is also where niche pages win SEO more often than broad phrases. People searching for this exact troubleshooting scenario want a focused answer tied to a real operational problem. A page like this converts that intent directly into a tool workflow instead of asking the reader to infer which utility to open.
Run the privacy checks next
These tools help when the issue is in consent strings, cookie state, CMP presence, or privacy-signal handling.
Cookie Inspector
Parse and analyze Set-Cookie headers or page cookie dumps to surface security, scope, and privacy issues with remediation guidance. Useful for privacy, security, and ad ops teams to quickly understand cookie risks and fixes.
Cookie Sync Visualizer
Fetch a page and list likely cookie-sync or ID-match partners based on sync-like endpoints found in HTML resources. This is a useful first pass for privacy, identity, and header bidding investigations when you need to see which third-party domains look involved in sync behavior.
TCF String Decoder
Decode IAB TCF v2 consent strings into human-readable metadata, purposes, and vendor consent arrays. Paste a TC string from a CMP or euconsent-v2 cookie, and instantly see what it contains for QA, troubleshooting, and compliance checks. Everything runs client-side for privacy.
Keep moving through privacy debugging
Use the next links when you need to connect this page with the rest of the consent and CMP workflow.