Monetizing your website with Google AdSense is one of the most efficient ways to generate passive income online. However, your ad placement and visibility directly influence performance and revenue. If you’re looking for a lightweight, mobile-ready, and fully accessible floating ad unit, this updated guide will show you how to integrate it cleanly on any website.
Step-by-Step Setup
Follow the steps below to integrate the floating AdSense unit into your website. It requires no external frameworks and works on all devices using clean HTML and JavaScript.
Step 1: Add the AdSense Script
Insert the official AdSense script inside your website’s <head> section:
<script async src="https://pagead2.googlesyndication.com/pagead/js/adsbygoogle.js?client=ca-pub-XXXXXXXXXXXXXXX" crossorigin="anonymous"></script>
Replace ca-pub-XXXXXXXXXXXXXXX with your AdSense Publisher ID, available in your AdSense account.
Step 2: Add the Floating Ad Unit Code
Add the following snippet just before the closing </body> tag of your site:
<!-- Fully Responsive Floating AdSense (Inline Only) -->
<script async src="https://pagead2.googlesyndication.com/pagead/js/adsbygoogle.js?client=ca-pub-XXXXXXXXXXXXXXX" crossorigin="anonymous"></script>
<div id="floatAd" role="region" aria-label="Advertisement" aria-live="polite" tabindex="0" style="position:fixed;z-index:9999;display:flex;flex-direction:column;align-items:flex-end;outline:none;max-width:90vw;margin:0;padding:0;box-sizing:border-box;opacity:0;transition:opacity .4s ease;">
<button id="adCloseBtn" aria-label="Close advertisement" aria-controls="floatAd" title="Close advertisement" style="border:none;background:rgba(0,0,0,.6);color:#fff;padding:3px;font-size:12px;cursor:pointer;line-height:1;">✕</button>
<ins class="adsbygoogle" aria-hidden="true" style="display:block;width:300px;max-width:100%;height:auto;" data-ad-client="ca-pub-XXXXXXXXXXXXXXX" data-ad-slot="XXXXXXXXXX" data-ad-format="auto" data-full-width-responsive="true"></ins>
</div>
<script>(function(){if(document.getElementById('floatAdLoaded'))return;const a=document.getElementById('floatAd'),b=document.getElementById('adCloseBtn'),s=12;a.id='floatAdLoaded';function r(){const w=window.innerWidth;if(w<420)return{bottom:s+'px',left:'50%',transform:'translateX(-50%)'};const p=[{bottom:s+'px',right:s+'px'},{bottom:s+'px',left:s+'px'},{top:s+'px',right:s+'px'},{top:s+'px',left:s+'px'}];return p[Math.floor(Math.random()*p.length)];}function apply(){Object.assign(a.style,r());a.style.maxWidth=window.innerWidth<420?'90vw':'320px';}function render(){try{(adsbygoogle=window.adsbygoogle||[]).push({});}catch(e){setTimeout(render,500);}}setTimeout(()=>{apply();render();a.style.opacity=1;},3000);b.addEventListener('click',()=>a.remove());document.addEventListener('keydown',e=>{if(e.key==='Escape')a.remove();});window.addEventListener('resize',apply);})();</script>This version automatically:
- Displays in a random screen corner each time it loads
- Centers perfectly on mobile devices
- Allows users to close with a button or the Escape key
- Adapts instantly to screen resize or rotation
- Loads smoothly with fade-in animation
Step 3: Update Your AdSense Details
Replace placeholders with your live AdSense values:
data-ad-client="ca-pub-XXXXXXXXXXXXXXX"
data-ad-slot="XXXXXXXXXX"Find these values in your Google AdSense Dashboard under Ad Units.
Done
Once saved, refresh your page to see your responsive floating ad live. It’s policy-compliant, fast-loading, and adjusts seamlessly across devices.
Tips for Better Performance
- Use only one floating ad per page (AdSense policy).
- Avoid covering important content or navigation.
- Test placement across desktop and mobile layouts.
- Track performance using your AdSense reports.
Features
- Fully responsive and lightweight (under 5KB)
- 100% mobile-optimized and accessible
- Automatic random positioning for better engagement
- Fade-in animation for smooth display
- No dependencies — pure HTML, CSS, and JS
License
MIT License © 2025
Freely available for modification and redistribution.