Is using a VPN or Tor legal?

In most countries: yes. A few states license or restrict VPNs (China, Russia in part, UAE, Turkmenistan) - the method guides name them.

Why is a site blocked?

Four usual reasons: your network's filter (school, work, family), your ISP following a court order, a national censorship program, or the site itself restricting regions.

Why no fake mirrors?

Mirror domains are the top malware vector for blocked sites. We only list official domains and onion addresses that can be verified.

Will this site tell me what is illegal in my country?

It tells you what is commonly legal or restricted and links the sources, but nothing here is legal advice.