Privacy & Identity Library
Back to libraryReview TCF and GPP Cookies Before Bidder Testing
Use the inspector before bidder QA when teams need to confirm whether the expected privacy-cookie mix is even present.
Why this workflow matters
Teams use Consent Cookie Inspector when they need to confirm whether TCF, GPP, or other consent cookies are present before bidder testing starts. Bidder QA becomes harder to interpret when the privacy-cookie baseline was never verified first.
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. Consent 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 Consent Cookie Inspector first and inspect the cookie string, identify the detected privacy artifacts, and use that list as the baseline for the bidder review. Supporting tools such as TCF String Decoder, US Privacy String Decoder, and CMP Inspector 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
A useful first pass makes bidder debugging less speculative by grounding it in the actual consent artifacts on the page.
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.
Consent Cookie Inspector
Parse cookie strings for common consent and privacy signals such as euconsent-v2, addtl_consent, US Privacy, and GPP cookies so teams can see which consent artifacts are actually present.
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.
US Privacy String Decoder
Decode IAB US Privacy strings into readable notice, opt-out, and LSPA flags for CCPA and US state privacy debugging.
CMP Inspector
Inspect page source or a public URL for CMP API markers, common CMP vendors, consent-cookie names, and script hosts before deeper privacy debugging starts.
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.