Page check
What would Kuuko block on this page?
Paste the address of any public web page. Our server in Germany opens it like a new visitor and lists every company the page contacts. It does this three times: without touching the cookie banner, after refusing cookies (“Reject all”) and after accepting them (“Accept all”). Then we show which of those companies Kuuko blocks.
Check a page
Result
Why three situations?
Cookie banners ask for your choice, but what you choose doesn't always decide what happens. In a 2021 study of 27,953 sites using cookie-consent tools, more than 75 % of tracking happened before visitors could choose, or after they rejected. Papadogiannakis et al., The Web Conference 2021
The addresses
| Address | Company | Purpose | Whose | Kuuko | Seen |
|---|
Two ways on
Try Kuuko free for a week. Then keep it, or build it yourself — here's how.
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The link shows this result for up to an hour. After that, opening it runs a new check.
Corrections
Think a result is wrong? Results are deleted after an hour, so write to check@kuuko.app with the page address and what looks wrong, and we'll check the page again.
What this check can't see
- Data the site's own server passes on to other companies. That happens out of sight, between servers.
- Tracking that runs on the site's own address.
- Other pages of the same site, and anything after you log in.
- Results change with country, device and time. We check from a data centre in Germany, which some sites treat differently.
What Kuuko can't block
- Everything in the list above.
- Apps that contact fixed internet addresses instead of names. Instagram does this: we saw it in our own test on 25 October 2026.
Credits
Block lists: HaGeZi DNS Blocklists (GPL-3.0) and Kuuko's own lists. Company names: AdGuard companiesdb (CC BY-SA 4.0); our adapted copy is published here under the same licence. Domain grouping: the Public Suffix List. Cookie banners answered with DuckDuckGo's autoconsent (MPL-2.0).