Global Privacy Control (GPC) Inspector

This Global Privacy Control Chrome Extension enables the GPC setting and evaluates whether whether websites honor the opt-out setting by providing transparency into the personal data shared with third parties.

The right for website visitors to opt-out of the sale of personal information is a hallmark of data privacy laws such as the California Consumer Privacy Act (CCPA). Regulators are accelerating enforcement against companies that do not honor the Global Privacy Control (GPC) signal as a valid opt-out. "Under law, [GPC] must be honored by covered businesses as a valid consumer request to stop the sale of personal information." https://oag.ca.gov/privacy/ccpa"

For developers and IT teams, this extension helps understand and debug how webpages respond to the GPC signal. Diagnostic capabilities include:

- Validate the GPC signal was set and the website response is consistent with the GPC specification

- Diagnose website behavior including whether the GPC signal was read by the page

- Debug whether personal data is shared by examining information provided to third parties using beacons and cookies.