NovaBlockNovaBlock
Free Tools

Test whether your ad-blocker is actually working.

Runs a live, in-browser test against known ad and tracker URLs. Tells you exactly which categories your current setup is blocking — and which slip through.

Diagnostics~5 secondsNo sign-up required

Live ad-blocker test

12 known ad and tracker endpoints will try to load. Each blocked request is a win.

About this tool

Your browser tries to load 12 well-known ad and tracker endpoints. If the request fails, that endpoint is being blocked (good). If it succeeds, the tracker can run.

DNS-level blockers (like Pi-hole), browser content blockers (uBlock Origin, NovaBlock, Brave Shields) and corporate firewalls will all show up here.

Other free tools