URL:

How the Web Works

Enter a URL and watch every step from keystroke to rendered page — with real-world timing data.

1
DNS Lookup
2
TCP Handshake
3
TLS Negotiation
4
HTTP Request
5
Server Response
6
Browser Render
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Step 1: DNS Lookup
Translating domain name to IP address
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Cache TTL: 300s UDP port 53 ~50ms cold <1ms warm
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Step 2: TCP Handshake
Establishing a reliable connection
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SYN → SYN-ACK → ACK ISN randomized 1 RTT = ~20ms Port 443
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Step 3: TLS Negotiation
Encrypting the connection with TLS 1.3
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TLS 1.3 ECDHE key exchange 1-RTT handshake 0-RTT on resume
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Step 4: HTTP Request
Sending headers to the server
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GET / HTTP/2 ~400 bytes headers HPACK compressed
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Step 5: Server Response
Headers and body arriving from server
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200 OK Content-Type: text/html gzip compressed TTFB: ~35ms
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Step 6: Browser Rendering
From bytes to pixels on screen
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