Free Unlimited Chess Game Analysis
Analyze any chess game for free with Stockfish 17 — unlimited reviews, no daily caps, no paywall. Import from Chess.com, Lichess, or paste a PGN file.
VoltChess delivers professional-grade game review in seconds: move classification, accuracy scores, blunder detection, and an interactive evaluation graph. Everything runs in your browser.
Is VoltChess really free?
Yes — 100% free for game analysis. No credits, no subscription, no hidden premium tier for reviews.
Which Stockfish version does VoltChess use?
Stockfish 17 runs locally in your browser via WebAssembly. A lightweight 6 MB lite build loads first for faster startup.
Can I upload PGN files?
Yes. Switch to the PGN tab to paste or upload any standard PGN file for instant analysis.