How do I know if my ad blocker is working?

Click the 'Start Test' button above. Our tool sends requests to real ad networks. If your blocker intercepts them, they'll show as blocked. A score of 85% or higher means your ad blocker is working well.

Is this test safe to use?

Yes. We send real requests to ad network servers to test if your blocker intercepts them. No actual ads or malware are displayed on the page.

Do you collect my data?

No. Everything runs locally in your browser. We never see or store your browsing history or personal info.

Why is my mobile score different?

Mobile browsers have stricter limits. iOS Safari, for example, blocks some testing methods that work on desktop.

How often should I test my adblocker?

Run it after updating your ad blocker, changing settings, or switching browsers.

Which ad blocker do you recommend?

We recommend Blockify. It catches ads that slip past other blockers and typically scores 95% or higher.

What does an ad block test actually measure?

An ad block test checks whether your browser blocks requests from ad, tracking, and analytics domains. It also evaluates scripts, pixels, and background network activity.

Why do some ads still appear when my ad blocker is on?

Some blockers hide ads visually but still allow scripts or requests to run. Outdated filter lists or advanced ad delivery can also cause gaps.

What is the difference between blocked and accessible?

Blocked means the request was successfully stopped by your ad blocker. Accessible means the domain or script was still able to load.

Why does my score change between browsers?

Different browsers handle extensions and request filtering in different ways. Chromium, Firefox, and Safari can produce different blocking results.

Why are some ad block tests inaccurate?

Some tools only test a limited set of domains or ignore script execution. Browser limitations and blocker behaviour can also affect results.

What is Manifest V3 and why does it matter?

Manifest V3 changes how extensions block network requests in Chromium browsers. This can limit filtering rules and affect blocking performance.

Adblock Test

Want to test your ad blocker? Find out if your browser is truly protected. This free tool checks your setup against 85+ real ad networks and trackers to show you what gets blocked.

One click. No signup. No downloads. Hit the button to test ad blocking and watch live connection attempts. Get your final adblock score in seconds.

Fast baseline → change settings → retest | Works with all blockers (uBlock, Blockify, etc.)

How This Ad Block Tester Works

We run three simple steps to check your protection:

1. Detect Your Browser & Ad-blocking Setup

We check which browser engine you use (Chrome, Safari, or Firefox) to tailor the test for your setup.

2. Send Test Ad Requests

We fire real ad requests to ad servers from Google, Facebook, and other networks.

3. Check the Results

If your ad blocker stops the request, it's working as intended. If it gets through, we count it as a leak.

Types of Ads & Trackers We Test

We test across 80+ real ad, tracking, and analytics domains including Google Ads, TikTok, Facebook, Unity, Yahoo, and major OEM tracking systems.

Display & Banner Ads

Standard IAB formats like leaderboards, skyscrapers, and embedded display units are among the most common ad types on the web. These are typically loaded dynamically into containers such as div.ad-banner and served through large ad networks.

Video Ads

Video ads are often delivered before or during content playback, especially on platforms like YouTube. These ads rely on multiple layers of delivery, including video streaming endpoints and ad-serving domains.

Audio Ads

Audio ads are commonly inserted into streaming platforms like Spotify and other music services. These ads are often harder to detect because they are embedded directly into audio streams rather than displayed visually.

Analytics & Invisible Trackers

Not all tracking is visible. Many websites use invisible pixels and background scripts to collect user behaviour, session data, and performance metrics.

Programmatic Ads

Modern advertising relies heavily on programmatic systems, where ads are bought and served in real time through automated exchanges.

Contextual & Native Ads

Native ads are designed to blend into content, often appearing as "recommended for you" or "sponsored content" widgets. These are commonly powered by content discovery platforms.

Pop-ups & Overlays

Pop-ups and overlay ads interrupt the browsing experience by blocking content or forcing user interaction. These are often triggered via scripts and delivered through standard ad networks.

E-commerce & Retargeting

Retargeting ads track your browsing behaviour across websites and show personalised ads based on your activity. These are commonly used in e-commerce and social advertising platforms.

Error Tracking & Monitoring

These tools collect data on user behaviour, crashes, and performance issues. While useful for developers, they can still track user sessions and interactions.

Device & OEM Tracking

Some tracking happens at the device or operating system level, especially on mobile devices. This includes telemetry and behavioural data sent directly by manufacturers.

Affiliate & Attribution Tracking

These systems track referrals, conversions, and commissions across websites. They are commonly used in e-commerce and partner marketing setups.

Fingerprinting & Advanced Tracking

Advanced tracking methods do not rely on cookies alone. They may use browser, device, and behavioural signals to identify users across sessions.

Script Loading & Ad Injection

Some ads and trackers rely on JavaScript execution rather than direct domain calls. Even if domains are blocked, scripts can still run if not properly intercepted.

DNS & Host-Level Blocking

Some ad blockers operate at the network or DNS level, blocking domains before they even reach the browser.

Why Some Ad Block Tests Are Inaccurate

Some tools only check a small set of static domains. Others ignore whether scripts still load in the background. And some can produce misleading results depending on the browser, blocker, or filtering method being used.

That means a high score does not always equal complete protection, and a low score does not always mean your setup is failing.

Common limitations:

JavaScript Restrictions

Some browsers limit how blocked requests can be detected.

Ad Blocker Behaviour Differences

Some blockers return fake responses instead of blocking requests fully.

Manifest V3 (Chromium Browsers)

Modern Chrome-based browsers limit filtering rules, reducing blocking depth.

What Your Score Means

Higher scores mean better protection. But blocking too much can sometimes break websites. Here's what each range means:

85 - 100(Excellent)— Fortress Mode

Almost everything is blocked. Your ad blocker is working as intended, protecting you from 99% of ads and trackers.

What it means: Very little data leaks out. Note: Some websites may not work correctly at this level.

75 - 85(Good)— Standard Protection

Most ad networks are blocked, but a few invisible trackers got through.

What it means: You won't see most ads, but some tracking data may still leak. This is normal for default settings.

65 - 75(Fair)— Basic Protection

Some gaps in protection. You might see video ads or cookie pop-ups.

What it means: Your filter lists may be outdated, or you have 'acceptable ads' turned on.

Below 65(Needs Work)— Low Protection

Many ad networks got through. Your blocker may be disabled or misconfigured.

What it means: Your browsing is being tracked. We recommend fixing this right away.

How to Improve Your Score

Scoring below 85%? Here are three quick fixes:

1. Update Your Filter Lists

Open your ad blocker settings and update EasyList and EasyPrivacy to the latest versions.

2. Turn On Strict Mode

Enable strict blocking to catch more hidden trackers and sneaky ads.

3. Use Only One Ad Blocker

Running multiple blockers (like uBlock + AdBlock Plus) causes conflicts. Pick one for best results.

Want Higher Scores? Try Blockify

Blockify catches ads that other blockers miss. It works out of the box with no setup needed.

Add to Chrome - Free

Free extension • No setup • 85%+ average score • Learn more

What Affects Your Ad-Block Test Results?

Browser Engine

Chromium-based browsers are transitioning to Manifest V3, limiting rule counts. Gecko (Firefox) allows deeper interception.

CPU/RAM Load

Heavy system load can delay script execution, causing "False Passes" or timeouts.

Network Latency

Slow connections might time out a request before your blocker inspects it.

Device Limitations

Mobile browsers often restrict advanced blocking methods.

Frequently Asked Questions

Ready to test your ad blocker?

Run the test now and get tips to improve your score.

Or try Blockify for best results