Free chess tools

Everything here runs in your browser — Stockfish 18 included — so these are free to use without an account and without a daily limit, and the positions you analyze are evaluated on your device.

Analysis board

Play through any position with Stockfish running in your browser. Paste a FEN or PGN, branch off, and see the evaluation move by move.

Chess clock

Time an over-the-board game: blitz through FIDE classical presets, increment or delay, the 40-move split, and a screen it asks to stay awake.

Elo calculator

Work out what a win, a draw, and a loss are each worth against a given opponent, at any K-factor.

Board visualization

Train the board in your head: square colors, coordinates both ways, knight routes, a short opening line followed blindfold, and a real position held from memory — as a set or a 30-second sprint.

Tools answer questions about one position. The review answers questions about your play.

Analyze my last 20 games