🛡️ AdBlock Test

Check whether an ad blocker is active in your browser — and exactly what it's blocking. Runs entirely on your device.

✓ Free Forever · ✓ No Signup · ✓ No Upload · ✓ Works Offline

🔒 It runs one ad-script probe — by design. To test network-level blocking, this tool tries to load Google's public ad script (no data about you is sent — it's just checking whether the request goes through). The other check is a hidden bait element measured locally. No file upload, nothing logged or stored.

Features

  • Two-way detection — Checks both cosmetic filtering (hidden ad elements) and network filtering (blocked ad requests) — the two ways ad blockers work.
  • Runs in your browser — The whole test happens on your device. No file upload, no account, no tracking.
  • See the breakdown — Not just yes/no — see which signal tripped, so you know exactly what your blocker is doing.
  • Re-test instantly — Toggle your ad blocker on or off and hit Test again to watch the result flip.
  • Scan dozens of networks — Beyond a yes/no, optionally probe 28 real ad and tracker networks — Google, Facebook, TikTok, Taboola and more — to see exactly which ones your blocker stops.

How It Works

  1. Open the page — The test starts automatically — no buttons to press.
  2. Read the verdict — A green or red banner tells you whether an ad blocker is active.
  3. Check the signals — See whether the bait element was hidden and whether the ad request was blocked.
  4. Test again — Change your ad blocker settings and re-run to confirm.

Use Cases

  • Confirm your ad blocker is actually working
  • Site owners: see what share of visitors block ads
  • Debug why ads or embeds don't show on a page
  • Check a fresh browser or extension setup at a glance

Frequently Asked Questions

How does an ad blocker test work?

It plants a hidden element with ad-like class names (which blockers auto-hide) and tries to load a known ad script (which blockers reject). If either is blocked, you are running an ad blocker.

Does this tool upload anything?

No file upload and nothing about you is logged. It only makes one request to a public ad-script URL to see if it is blocked — that request carries no personal data.

Why does it say I have an ad blocker when I don't?

Some privacy browsers (Brave), VPNs, or DNS-level blockers (Pi-hole) block ad requests too — they count as ad blocking. Strict tracking-protection settings can also trip the test.

Can websites detect my ad blocker like this?

Yes — this is roughly how they do it. There's no upload or special permission needed; the checks run in plain JavaScript in your browser.

Which ad networks does the deep scan test?

A curated set of major ad, analytics, social-pixel and native-ad networks — Google Ads/Analytics, DoubleClick, Amazon, Criteo, Facebook, TikTok, LinkedIn, Taboola, Outbrain and more. Each is probed once to see whether your blocker stops it.

Notes from Milo 🐨

2026-06-11

A few of you wrote in: “it only checks Google's ads — what about everything else?” Totally fair. So I added a deep scan that probes 28 real ad and tracker networks — Facebook, TikTok, Taboola, the lot. Now you can see exactly which ones your blocker actually stops.

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    💬 Bug, idea, or just to say hi? Tell Milo 🐨 · [email protected]