Is Blocksi AI Web Filter safe?

Low risk

Blocksi AI Web Filter sends visited URLs to Blocksi classification endpoints during browser navigation.

When navigation or history events occur, the background script passes the visited URL or hostname to Blocksi's classifier services. One path posts the URL to api.blocksi.net with a hardcoded Basic Authorization header; another queries service1.blocksi.net for a hostname rating.

Part of this rating comes from analysis signals we haven't published as detailed findings yet.

publishersv3.1.2Chrome Web Store
15Risk
Who publishes it

publishers - 1 other listing from the same operator, none carrying a finding

What this publisher told the store about itself, and the other listings that told it the same thing.

Publisher
publishers

Same store account

1 other listing published from this account, 1.0M+ users between them, none of them carrying a finding.

Shared hosts - 2 hostnames

Hostnames hardcoded in this extension that few other listings call. That can mean one operator behind both, and it can equally mean a small shared vendor, so it is context rather than a conclusion. Hosts that many listings call are left out: they are services, not connections.

blocksi.net
Also called by 2 other listings, including Blocksi
iwf.org.uk
Also called by 2 other listings, including Blocksi

AI-generated. Findings may contain errors. Those marked Verified have been manually reviewed.

Publishers can request a review.

Where it sends data

Destinations our analysis observed Blocksi AI Web Filter contacting. Sending data somewhere is not a finding on its own - an extension that syncs your settings has to talk to its own server - but it is where your data can go, and who else it goes to.

  • api.blocksi.net

    Blocksi AI Web Filter sends data to api.blocksi.net. No other extension we have analysed sends data here.

  • service1.blocksi.net

    Blocksi AI Web Filter sends data to service1.blocksi.net. No other extension we have analysed sends data here.

Updated 30 September 2026celjchjgliegnlalhjegfcaacphgdkij