See this page fetch itself, byte by byte, over TLS

This page performs a live, annotated https: request for its own source. It’s inspired by The Illustrated TLS 1.3 Connection and Julia Evans’ toy TLS 1.3.
It’s built on subtls, a pure-JS TLS 1.3 implementation that depends only on SubtleCrypto. Raw TCP traffic is carried via a serverless WebSocket proxy.

Key Raw bytes in hexadecimal. Outgoing message annotations. Incoming message annotations.

Code on GitHub. Easter egg: append a neon.tech PostgreSQL connection string as the # hash part of the URL to follow along with a simple PostgreSQL session instead.