Free tool No login
FEN Viewer
A FEN string is a six-field snapshot of one chess position. Paste a valid FEN below to inspect the board, flip the orientation, and hand the position to the full analysis app through a private URL fragment. A FEN contains no move history, so it cannot establish repetition or explain how the position arose.
On this page
What you get
- Inspect the supplied game or position before asking an engine for a verdict
- Hand off to the app for local Stockfish analysis, move grades and an evaluation graph
- Keep PGNs and FENs on the device rather than uploading them for analysis
- Use the analysis app offline after its core files and engine have been cached successfully