UK GDPR & Google Consent Mode v2 Validator
Verify your website complies with Google Consent Mode v2 (ad_user_data, ad_personalization), CMP integration, and UK GDPR / Data Protection Act 2018.
Overview & why this matters
Since March 2024, Google strictly mandates Consent Mode v2 for all domains using Google Ads remarketing, audience building, and conversion tracking in Europe and international privacy jurisdictions.
Concurrently, data protection laws like Brazil's LGPD and the EU's GDPR penalize websites that drop third-party marketing tags before receiving affirmative user consent.
Why consent mode v2 is mandatory for modern marketers
Preserve Google Ads Remarketing & Modeling
Without Consent Mode v2 signals (ad_user_data and ad_personalization), Google Ads stops populating remarketing lists and loses conversion modeling accuracy.
Avoid Hefty LGPD & GDPR Fines
Firing Facebook Pixel, TikTok Pixel, or GA4 before the visitor clicks 'Accept' on a CMP banner violates data privacy laws.
Recover Lost Conversions with Advanced Consent
Properly implemented Consent Mode allows Google to use cookieless pings to recover up to 70% of ad conversion paths lost to cookie rejections.
Consent Mode v2 Default Initialization Script
Place this script in your <head> before Google Tag Manager loads to establish default denied consent states:
window.dataLayer = window.dataLayer || [];
function gtag(){dataLayer.push(arguments);}
gtag('consent', 'default', {
'ad_storage': 'denied',
'analytics_storage': 'denied',
'ad_user_data': 'denied',
'ad_personalization': 'denied'
});