AdBlock Checker

Check if the current web browser has any ad blockers (AdBlock, Adblock Plus, uBlock, AdGuard, ...) enabled.

Usage

import { checkAdBlock } from "adblock-checker";

console.log(await checkAdBlock()); // true or false

How It Works

checkAdBlock sends a HEAD request for the Google ads script on pagead2.googlesyndication.com. It returns true if the request is blocked, or if the script is replaced with a small fake one.

When the request fails, it sends another HEAD request to data.jsdelivr.com to check whether the network is available. If the network is not available, it returns false.

Each request times out after 15 seconds.

Content Security Policy

If your website uses a Content Security Policy, connect-src must allow both https://pagead2.googlesyndication.com and https://data.jsdelivr.com, otherwise the result is wrong. For example, if only data.jsdelivr.com is allowed, every visitor is detected as using an ad blocker.

Usage for Browsers

Source

Demo Page

License

MIT