A YouTube adblock test needs two separate checks
A general adblock test checks whether your browser can reach selected ad and tracker resources. YouTube playback is a different check. A high score here is not a promise of ad-free YouTube.
Start with Super Adblock Test in the browser you actually use. Then check YouTube in that same browser and profile. Keep those observations separate: one measures our probes; the other shows what happened during your video session.
How to check your setup without guessing
- Write down the environment. Note the browser, normal or private window, blocker name, VPN or DNS filter, and date. YouTube in Safari and YouTube in its own app are different environments.
- Run our test to completion. Read the category details, not just the headline score. Keep the result so you can compare it after a change.
- Open YouTube in the same browser. Note whether the video plays, whether an ad appears and whether YouTube displays an ad-blocker warning. Do not enter account details into an unofficial test or login page.
- Check your blocker once. Confirm that it is enabled for this browser and site. Install available updates from its official source. If several extensions or filters are involved, change one setting at a time.
- Repeat and record the difference. A single video without an ad is only an observation. Ad delivery can vary between sessions; it does not establish a permanent result.
High score, but YouTube still shows ads?
That is a limitation of the measurement, not a contradiction. Our test does not play a YouTube video or inspect ads inside your account. It cannot certify pre-roll, mid-roll, mobile-app or TV-app blocking.
DNS filters work with hostnames, while browser rules can use page and request context. Blocking a hostname does not distinguish every ad from wanted content delivered through that host. Adding more DNS lists is not proof that video ads will disappear. Our DNS testing guide explains how to check that layer.
Adblock not working on YouTube: check the symptom
- Ads appear in the YouTube app, but not the browser: you are comparing different apps. A browser extension cannot apply its rules inside a separate app.
- The browser test score is unexpectedly low: check site permissions, exceptions and whether the intended blocker is active. Follow the adblock troubleshooting guide.
- The video is stopped by an ad-blocker warning: read the warning. YouTube says blocking ads can result in playback restrictions and directs viewers to allow ads or use YouTube Premium. See YouTube's official guidance.
- An empty box remains: network blocking and hiding the leftover page space are different jobs. An empty placeholder alone does not show that an ad request succeeded.
What a useful result looks like
“Safari, normal window, this blocker enabled: test score X; a video ad appeared” is useful. “Blocks everything” is not. Record the browser result and playback observation separately, then decide whether your setup meets your needs.
You do not need to install another VPN just because a video ad appeared. First find out which protection is active and what it can measure. Read the score explanation before treating a percentage as a guarantee.
Questions, answered
Does a 100% adblock score mean YouTube ads are blocked?
No. The score covers the requests and checks included in that test run. It is not a test of YouTube video-ad delivery or proof of ad-free playback.
Why is my adblock not working on YouTube?
A browser permission, site exception, outdated blocker or YouTube playback restriction may be involved. Compare the same browser and profile, check the blocker settings and read the exact playback message.
Can a Safari extension block ads in the YouTube app?
A Safari extension runs in Safari. It does not extend its browser rules into the separate YouTube app. Network filtering has a different scope and its own limits.