Adblock Detector

How to integrate Adblock Detector with Webflow

Ad block detection helps you understand your audience and adapt your content strategy. Detecting ad blocking tools lets you segment analytics to measure their impact on engagement metrics, offer alternative support options like subscriptions to users seeking ad-free experiences, and troubleshoot user-reported issues caused by blocking extensions interfering with legitimate site functionality.

Implement ad block detection through custom code in Webflow or use server-side detection methods. Both approaches require privacy compliance for EU/EEA and California users through consent management and disclosure requirements.

Use a Native Adblock Detector

You can use a native adblock detector from the Webflow Apps Marketplace. With a one-click install, it’ll help you protect revenues and set up customizable popups.

Use custom JavaScript detection

Implement ad block detection using custom JavaScript in Webflow's Project Settings.

Add detection script to Webflow

Navigate to Project Settings > Custom Code > Footer Code section.

Add detection JavaScript to test for ad blocker presence using bait element technique. Create hidden div with ad-like properties, check if standard ad network scripts load successfully, and detect localStorage interference patterns.

Example detection pattern (customize for your implementation):

• Create test element with class names like "ad-banner" or "advertisement"
• Check element visibility after page load
• If hidden, blocker likely active

Configure consent management (EU/EEA traffic)

For sites with EU/EEA visitors, install Consent Management Platform (CMP) with script-blocking capability and set up jurisdiction-specific rules.

Create separate consent purpose specifically for ad block detection. Cannot bundle with other tracking purposes per GDPR Article 4(11).

CMP options to evaluate include OneTrust, Cookiebot, Didomi, Osano, and Termly. Verify Webflow compatibility independently before implementation.

Implement GPC detection (California traffic)

For California users, honor Global Privacy Control automatically:

if (navigator.globalPrivacyControl === true) {
 // Block third-party data sharing
 // Process detection data first-party only
 // Do not load external analytics with user identification
}



California Code § 7025 requires automatic GPC honoring without user prompts.

What you can build

Common ad block detection implementation patterns for Webflow sites include building systems that respond to blocker presence while maintaining privacy compliance.

• Convert ad-blocking visitors to subscribers: Use targeted ads to turn these visitors into subscribers
• Segment analytical data: Gain more insights into your traffic
• Display alternative support options: Privacy considerations require avoiding cookie walls (content blocking until blocker disabled). Present alternatives as voluntary options respecting user choice. GDPR prohibits conditioning access on consent.

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