I built https://dxc4.com – a free chess analysis tool that doesn’t use servers or databases. The entire analysis session (moves, variations, current position) is encoded in the URL itself. That means when you share a link, the recipient sees exactly what you see. The Stockfish engines runs entirely in your browser via WebAssembly — so there are no server costs, no logins, no data leaving your device. Once loaded, it even works offline.

It does a bunch more. Would love some feedback.

You can read more about it here: https://notsocommonthoughts.com/blog/chess-analytics-in-the-...