How to Use "Ad Blocker Detected" on Blogger & Websites

📌 Blog Post: How to Use "Ad Blocker Detected" on Blogger & Websites | AdSense Friendly

Are you struggling with ad blockers reducing your earnings? Many users install AdBlock or similar extensions, which hide ads and affect your AdSense revenue. The best solution is to detect ad blockers and show a polite message asking users to disable them.

This post will show you how to:
✅ Detect ad blockers on Blogger & websites
✅ Display an "Ad Blocker Detected" message
✅ Follow AdSense policies (no forced disabling!)
✅ Use SEO-friendly and lightweight JavaScript

🚀 Why Detect Ad Blockers?

📉 Ad Revenue Loss: Ad blockers hide ads, reducing clicks & impressions.
⚠️ Affects Free Content: Websites rely on ads to provide free content.
🎯 Better User Engagement: Politely asking users to disable ad blockers helps.

🛠️ Simple JavaScript to Detect Ad Blockers (AdSense Safe)

Copy and paste this lightweight JavaScript code inside your Blogger HTML (Theme > Edit HTML) or any website before </body>:

<script>
document.addEventListener("DOMContentLoaded", function() {
    setTimeout(function() {
        var ad = document.createElement('div');
        ad.innerHTML = '&nbsp;';
        ad.className = 'adsbox';
        document.body.appendChild(ad);
        window.setTimeout(function() {
            if (ad.offsetHeight === 0) {
                showAdBlockMessage();
            }
            ad.remove();
        }, 100);
    }, 1000);

    function showAdBlockMessage() {
        var adBlockDiv = document.createElement('div');
        adBlockDiv.innerHTML = `
            <div id="adblock-message" style="position: fixed; top: 0; left: 0; width: 100%; height: 100%; background: rgba(0, 0, 0, 0.8); color: white; text-align: center; padding: 50px; z-index: 9999;">
                <h2>🚫 Ad Blocker Detected!</h2>
                <p>Please disable your ad blocker to support our website and continue browsing.</p>
                <button onclick="closeAdBlockMessage()" style="padding: 10px 20px; background: #ff9800; border: none; color: white; font-size: 16px; cursor: pointer;">Okay, I’ll Disable</button>
            </div>
        `;
        document.body.appendChild(adBlockDiv);
    }

    window.closeAdBlockMessage = function() {
        var msg = document.getElementById('adblock-message');
        if (msg) msg.remove();
    };
});
</script>
<style>
.adsbox { width: 1px; height: 1px; position: absolute; top: -1px; left: -1px; }
</style>

🔧 How This Code Works?

✔️ Creates a hidden test ad element and checks if it's blocked.
✔️ If blocked, shows a polite message to disable ad blocker.
✔️ No forced disabling (AdSense-friendly policy).
✔️ Lightweight & does not affect website speed.