hackmd.io
Mostly blocked
13 of the 14 URLs we have a verdict for under hackmd.io are blocked in mainland China; 1 are not. The site itself, https://hackmd.io, is blocked. The Great Firewall poisons its DNS, silently drops its packets so requests time out and returns empty responses. 198 tests have been run under this domain since 2016-11-10, the most recent on 2026-07-22.
The site itself
http://hackmd.ioBlockedhttps://hackmd.ioBlockedPages and subdomains (12)
https://hackmd.io?nav=overviewas of 2026Blockedhttps://hackmd.io/@jowno/seirimwBlockedhttps://hackmd.io/%40brainheimlichas of 2026Blockedhttps://hackmd.io/%40jowno/seirimwBlockedhttps://hackmd.io/%40jowno/mwrekishias of 2026Blockedhttps://hackmd.io/%40Vanthier/SkMIVtki8as of 2026Blockedhttps://hackmd.io/%40desperado149597871as of 2026Blockedhttps://hackmd.io/%40jowno/mwrekishi-shBlockedhttps://hackmd.io/WENqcjuWSCafoBeuQ4qJrwas of 2026Blockedhttps://hackmd.io/YpVWx0a6Tk2JBdq62ABAYAas of 2026Blockedhttps://hackmd.io/nZiOZ44vSKy9XJk5BPNqxg?both=as of 2026Blockedhttps://hackmd.io/@C9HMZIz5TE60CrGpGlRu2g/HkXFHR7YN?type=viewIntermittentAbout hackmd.io and the Great Firewall
13 of the 14 URLs we have a verdict for under hackmd.io are blocked in mainland China; 1 are not. The site itself, https://hackmd.io, is blocked. The Great Firewall poisons its DNS, silently drops its packets so requests time out and returns empty responses. 198 tests have been run under this domain since 2016-11-10, the most recent on 2026-07-22.
A VPN or another circumvention tool routes the request outside mainland China, past the filtering that blocks hackmd.io. 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.