Adblock detector
The adblock detector script for your website
Add a detector that identifies visitors using an ad blocker on your site, measures your real ad-block rate in a live dashboard, and asks blocked visitors, politely, to allow ads. One async script tag, free to start.
What a good adblock detector has to do
Detect every blocker
One bait is not a detector. AntiAdBlock Core votes across multiple independent signals, DOM baits, network baits, CSS probes and MV3 heuristics, so uBlock Origin, AdBlock Plus, AdGuard, Brave Shields and uBlock Origin Lite are all caught.
Measure, not guess
The detector feeds a live dashboard: your real ad-block rate, detections and recoveries per site and per day, plus the estimated revenue at stake based on your CPM.
Recover the visit
Detection alone earns nothing. A customizable overlay asks blocked visitors to allow ads, and the dashboard tracks exactly how many do.
Stay compliant
No tracking cookies, no fingerprinting, no visitor identifiers. Our statistics keep daily aggregates only, and the detector is designed for GDPR and CCPA.
One detection script, any stack
The same adblock detection script drops into any site. Paste one async tag, or use the Detection API when you want the result in your own JavaScript with no overlay.
This is the detector, running live
The test below runs 3 detection checks against your current browser, right now. This same detection runs on your site after a 60-second install.
Adblock detector FAQ
What is an adblock detector?
An adblock detector is a script a website adds to identify visitors who are blocking ads. Good detectors combine several independent detection vectors and vote on the result, then feed analytics and a recovery flow. AntiAdBlock Core bundles the detector, the dashboard and the recovery overlay in one script tag.
How do I add an adblock detector to my website?
Sign up free, verify your domain and paste one async script tag in your <head>. The whole install takes about 60 seconds and works on any CMS, WordPress and Blogger included.
Does it detect uBlock Origin and Chrome MV3 blockers?
Yes. The engine detects uBlock Origin (Basic, Optimal and Complete), uBlock Origin Lite on Chrome's Manifest V3, AdBlock, AdBlock Plus, AdGuard, Brave Shields and Ghostery, and is kept current as filter lists change.
Is an adblock detector legal and GDPR-safe?
Detection itself is legal. AntiAdBlock Core is built to be GDPR/CCPA-safe: it sets no tracking cookies, does no fingerprinting and keeps no visitor identifiers, only daily aggregate counts per site.
How much does an adblock detector cost?
AntiAdBlock Core's detector is free for 10,000 detections a month, with public paid plans from $5 to $29.99/month for higher volume. No revenue share and no traffic minimum.
Is AntiAdBlock Core an adblock detection script?
Yes. At its core it is a JavaScript adblock detection script, but instead of a single bait check it votes across multiple signals and adds a live dashboard and a recovery flow. If you only want the signal, the Detection API returns the result to your own JavaScript with no overlay.
Does the detector work on WordPress, Blogger and other CMSs?
Yes, on any CMS. On WordPress you add the tag through your theme header or a plugin; on Blogger you paste it into the theme HTML before the closing head tag. It also works on Ghost, Webflow, Shopify, static HTML and custom apps.
Is this an adblock detector for websites or a test for my own ad blocker?
This page is the adblock detector for websites: the script a site owner installs to detect blockers on their visitors. To see it react to your own ad blocker, add it to your own site: it is free for 10,000 detections a month and shows the result in your dashboard.
Can I use one adblock detector on several websites?
Yes. Every plan includes a number of websites, from 1 on Free to 10 on the largest plans, and each site gets its own script tag, its own stats and its own overlay settings from a single account.
Add the adblock detector to your site today
Measure your real ad-block rate this week and start recovering the revenue it costs you. Free to start, no credit card.
Get the detector free