Consent Signal Checker, developed by Google, is a Chrome extension for verifying consent framework implementations across websites. The tool provides real-time inspection and decoding of consent signals so developers can view how consent data is captured and represented. Key capabilities include signal decoding, CMP detection, and visual indicators for privacy APIs. It targets web developers, privacy engineers, compliance officers, and AdTech specialists who audit consent propagation during site testing.

Designed as a focused diagnostic for consent frameworks

The extension focuses on decoding and validating consent signals in real time, supporting IAB TCF v2.2, the Global Privacy Platform, and US Privacy strings. It breaks encoded consent strings into human-readable fields and automatically detects consent management provider activity on the active page. Those capabilities let developers confirm that consent data recorded by a CMP appears correctly in page APIs, which helps targeted debugging and regulatory checks.

Surfaces signals inside the browser for immediate testing

The tool integrates into the browser workflow, exposing signal data via the extension icon and a dedicated developer-tools panel so teams get immediate feedback during page tests. It consolidates multiple frameworks into a single view and uses visual indicators to mark the presence and validity of privacy-related API calls. Platform support covers Chrome and other Chromium-based browsers across desktop platforms:

• Chrome and Chromium-based browsers
• Desktop: Windows, macOS, Linux

Diagnostic orientation requires developer follow-up in workflows

The extension serves a technical audience: web developers, privacy engineers, compliance officers, and AdTech specialists who need readable signal telemetry. It is a diagnostic utility rather than an automated remediation tool, so engineering teams must translate findings into code changes or configuration updates. The tool’s privacy posture is aligned with typical developer utilities, keeping inspection focused on site-specific consent signals rather than broader telemetry aggregation.

Best used as a standards-focused inspection tool within testing pipelines

Consent Signal Checker is a practical diagnostic option for developers and privacy engineers who require standards-focused visibility into consent propagation. It suits test and audit workflows where immediate, readable signal data accelerates debugging. Use the tool as part of a testing pipeline alongside network inspection and automated tests to turn detected issues into deployable fixes and to document consent behavior across release cycles.