ooni.org
All blocked
Every URL under ooni.org that we can reach a verdict on — 12 of them — is blocked in mainland China. The site itself, https://ooni.org, is blocked. The Great Firewall silently drops its packets so requests time out, poisons its DNS and breaks its TLS handshake. 195 tests have been run under this domain since 2019-09-30, the most recent on 2026-08-16.
The site itself
http://ooni.orgBlockedhttps://ooni.orgBlockedhttp://www.ooni.orgas of 2026Blockedhttps://www.ooni.orgBlockedPages and subdomains (8)
https://ooni.org/install/desktopas of 2026Blockedhttp://api.ooni.orgas of 2026Blockedhttps://api.ooni.orgBlockedhttp://explorer.ooni.orgas of 2026Blockedhttps://explorer.ooni.orgas of 2026Blockedhttps://probe-web.ooni.orgBlockedhttp://explorer.ooni.org/zh-CNas of 2026Blockedhttps://explorer.ooni.org/zh-CNas of 2026BlockedAbout ooni.org and the Great Firewall
Every URL under ooni.org that we can reach a verdict on — 12 of them — is blocked in mainland China. The site itself, https://ooni.org, is blocked. The Great Firewall silently drops its packets so requests time out, poisons its DNS and breaks its TLS handshake. 195 tests have been run under this domain since 2019-09-30, the most recent on 2026-08-16.
A VPN or another circumvention tool routes the request outside mainland China, past the filtering that blocks ooni.org. GreatFire runs GreatFire VPN; the Analyzer also tests the domains of many VPN and proxy providers, so you can check whether one is reachable before relying on it.
Elsewhere on the site
Each URL's status is its verdict over the last 90 days, the same one its own page headlines.