What is a FEN string?

FEN (Forsyth-Edwards Notation) is a standard notation for describing a particular board position of a chess game. It includes piece placement, active color, castling availability, en passant target, halfmove clock, and fullmove number.

How do I use the FEN Viewer?

Paste one or more FEN strings (one per line) into the text area and click Load. Use the navigation buttons or arrow keys to step through positions. Press F to flip the board perspective.

Is this FEN Viewer free?

Yes, this FEN Viewer is completely free to use with no sign-up required. It runs entirely in your browser.

FEN Viewer — Chess Position Visualizer

Paste one or more FEN strings (one per line)

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Load a FEN to view the position

Positions

No positions loaded yet

♟ FEN Viewer

Positions