Free tool
PGN Viewer
Paste a PGN from chess.com, Lichess, a book, or an email and step through the game with arrow keys. The viewer shows the position at every move, names the opening, and — because Stockfish runs right in your browser — can grade every move and chart the evaluation with one click. Nothing is uploaded; your games stay on your device.
What you get
- Stockfish engine evaluation, live as you step through moves
- Full game review: every move graded, accuracy per side, evaluation graph
- Opening detection against 3,700+ named lines
- Works offline once loaded — your games never leave your browser