Your analysis stays on your device
Preparing for a tournament? You may not want your lines uploaded to a server. Chessyi runs Stockfish in a Web Worker on your machine, positions you analyse stay local. Only explicitly saved games sync to your account.
What you get
- local engine executes client-side
- No analysis queue on shared servers
- You control what is saved to the cloud
- HTTPS and secure session cookies for accounts
How it works
Open Chessyi
Stockfish loads into a browser worker.
Analyse freely
Evaluations compute on your CPU, not ours.
Save selectively
Only named saves go to your account.
Unique on Chessyi
- Full cloud platform without remote engine dependency
- Rare combination of privacy and 1.9M game library
Frequently asked questions
Related features
Full-strength Stockfish analysis in your browser
Run Local Stockfish engine analysis in your browser on Chessyi. Eval bar, multi-PV lines, depth control, and best-move arrows, no install, instant feedback.
Import, study, and export chess games as PGN
Paste or upload PGN files on Chessyi. Step through move history, analyse with Stockfish, export positions, and study your games on a full-featured interactive board.
Sync your study positions across devices
Save chess games and positions to your Chessyi cloud account. Pick up analysis on any device, secure sign-in with email verification.
Ready to analyse like a master?
Open the board free, Stockfish, openings, and 1.9M games in one place.
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