The PGN analyzer takes a game in PGN format and runs it through Stockfish 18: it evaluates every position, labels every move and scores accuracy for both sides. Paste the text into the field below or upload a file.
How to analyze a PGN file
- Paste the PGN or choose a file. You can also drop the file onto the field.
- Open the game. If the file holds one game, its page opens right away. If it holds several, they appear as a list.
- Analyze it. Stockfish runs in your browser and takes known positions from the evaluation database. The opening is detected from the moves.
Where to get a PGN
On Chess.com and Lichess you can download the PGN from the game page. Chess software such as ChessBase and SCID saves games as PGN, and tournament databases are shared in the same format. Your own Chess.com and Lichess games are easier to import by username, without a file.
Related tools
- Chess Accuracy Calculator: what accuracy is normal at your rating.
- FEN Analyzer: one position instead of a whole game.
- Free Chess Analysis: how many games you can analyze for free.
FAQ
What is a PGN file?
The standard text format for chess games. It holds the moves and header tags such as the players, ratings, date and result.
Can I upload a file with several games?
Yes. The games in the file appear as a list, and you open and analyze each one. The list needs an account; a single game can be analyzed without one.
Does this work for Chess.com and Lichess exports?
Yes, and for PGN from most chess software. Games from those two sites can also be imported without a file, by username or link.
How do I analyze a chess PGN online?
Paste the PGN text into the field on this page or drop a .pgn file onto it, then open the game.
What is kept from the PGN?
Player names, ratings, the date, the time control and the result. A game without a date gets the upload date. A game with no moves, or with neither player named, is not imported.