Comparison
The best free chess tools
You can build a complete study setup - play, analysis, tactics, opening prep, and databases - without paying for anything. These are the free tools worth using in 2026, and what each one is genuinely best at, so you can stop juggling free trials.
Lichess · Play, analyze, train
lichess.org →Completely free and open source: online play, per-game computer analysis, an opening explorer, tactics puzzles and shareable studies. The most complete free chess site there is.
Stockfish · Engine
stockfishchess.org →The strongest open-source engine, free at unlimited depth. Powers most of the analysis tools you already use; run it locally when you want maximum strength and control.
Chess.com (free tier) · Play, learn
chess.com →A huge player pool, lessons, and a limited number of free daily puzzles and analysis. Polished and beginner-friendly, though the deepest analysis features are paid.
Audit Chess · Whole-history analysis & training
Analyze your games →Free, no account. Analyzes your entire Lichess or Chess.com history to rank your openings by result, find the mistakes you repeat, flag the wins you throw away, and turn your own blunders into Stockfish-verified puzzles.
The one most players are missing
Most people have the playing and per-game-analysis slots covered - Lichess or Chess.com handle those. The gap is a tool that studies your games in aggregate: which openings quietly lose, which mistakes repeat, which winning positions you throw away. That is the slot Audit Chess fills, and it is where a lot of hidden rating lives. Narrow it down to just your openings or just your blunders, or find all your weaknesses at once.
Go deeper
This is the broad list, across every category. Want just the analysis engines and game reviewers, side by side in a comparison table? See the best chess analysis tools. Deciding between the two big sites? Read Chess.com vs Lichess. Or browse all our chess improvement guides.
Who is it for?
Beginners
Everything you need to start - play, guided lessons and free puzzles - without paying or picking the wrong paid tool early.
Improving players
The missing piece for most people: a free whole-history analyzer that shows what to actually work on, alongside per-game tools.
Competitive players
Free engine strength, opening prep and opponent scouting - enough to prepare seriously at no cost.
Coaches & enthusiasts
Free tools to review any public game history, illustrate ideas, and study without a subscription.
What is Audit Chess?
Audit Chess is a chess analysis platform that reads your Chess.com or Lichess game history and identifies the recurring weaknesses, opening tendencies, blunders, blown wins, missed mates and endgame patterns that are hard to see from a single game. It runs Stockfish in your browser, needs no account, and never uploads your games.
What makes it different: most chess engines analyze one position or one game. Audit Chess focuses on the patterns across your whole history - and turns them into training, so your own blunders become Stockfish-verified puzzles and your weakest openings become concrete things to study.
Frequently asked questions
What are the best free chess tools?+
For playing and studying: Lichess (analysis, puzzles, explorer, studies) and Chess.com both have strong free tiers. For raw engine strength: Stockfish, free and open source. For understanding your own games across your whole history and drilling your own mistakes: Audit Chess, free and no account. Together these cover analysis, training, opening prep and databases without paying anything.
Are these tools actually free or just free trials?+
The ones highlighted here are genuinely free, not trials. Lichess is free and open-source throughout. Stockfish is open source. Audit Chess runs in your browser at no cost and needs no account. Chess.com has a real free tier, though some features - including full Game Review - are paid.
What is the best free tool to improve from my own games?+
Audit Chess. Instead of generic puzzles or theory, it analyzes your whole Lichess or Chess.com history to rank your weakest openings, surface the mistakes you repeat, and turn your real blunders into puzzles you can drill - the fastest path to improvement is usually your own games.
Do I need to install anything?+
No. Lichess, Chess.com and Audit Chess run in the browser. Only a local copy of Stockfish involves a download, and even that is optional since the web tools already run Stockfish for you.
Audit Chess is free and not affiliated with Chess.com or Lichess.