AeroChess – Free Chess Game Analyzer
AeroChess is a free, browser-based chess analysis tool powered by Stockfish 18. Analyze your Chess.com and Lichess games with variable engine depth, no account or login required — free forever.
Features
- Stockfish 18 engine — the strongest open-source chess engine
- Variable analysis depth — go deeper than other free tools
- What-If mode — follow the engine's reasoning move by move and explore best-play continuations
- Full game review with move quality ratings: Brilliant, Best, Excellent, Good, Inaccuracy, Mistake, Blunder
- Import games directly from Chess.com or Lichess by username
- Paste any raw PGN for instant analysis
- Multi-threaded analysis on supported browsers for faster results
- Runs 100% in your browser — no server, no data sent, fully private
- No login. No account. Free forever.
Why AeroChess?
Most free chess analyzers cap your analysis depth and don't explain engine reasoning. AeroChess gives you configurable Stockfish 18 depth and a unique What-If mode that walks you through the engine's best moves step by step, so you understand why a move is best — not just that it is.