Day 1: Birthday Week

Encrypted Server Name Indication (SNI)

How private is your browsing history? Learn how Cloudflare is fixing one of the core Internet bugs.

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Day 1: Birthday Week

How Encrypted SNI Works

Learn how encrypted SNI protects your privacy by preventing the hostnames of sites you visit from being tracked by anyone listening on the Internet.

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Day 1: Birthday Week

Browser Experience Security Checker

How secure and private is your browsing experience? This page automatically tests for four areas of security.

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Cloudflare speeds up and protects millions of websites, APIs, SaaS services, and other properties connected to the Internet. Our Anycast technology enables our benefits to scale with every server we add to our growing footprint of data centers.

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Cloudflare dramatically improves website performance through our global CDN and web optimization features. Learn more

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Cloudflare’s WAF, DDoS protection, and SSL defend website owners and their visitors from all types of online threats. Learn more

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With over 35% market share, Cloudflare runs the largest, fastest, and most reliable managed DNS service in the world. Learn more

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Cloudflare’s network helps identify visitor and bot behavior that isn’t accessible to conventional analytics technologies. Learn more

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