Free Chess.com game analysis: what your options are
Analysing your games is the most reliable way to improve, but it is easy to end up paying for features you don't need. Here are the free ways to analyse Chess.com games, and what each one is good at.
1. Chess.com Game Review (free tier)
Chess.com offers a Game Review after each game. Free members get a limited number of full reviews; the rest of the features sit behind a paid membership. It is the most convenient option for looking at a single game right after you play it. Limits change from time to time, so check Chess.com for the current details.
2. Import into Lichess
Lichess is free and open source. Download the PGN of a game from Chess.com (Share → PGN), then paste it into lichess.org/paste and request a computer analysis. You get an evaluation graph, inaccuracies, mistakes and blunders, with no limit. It works game by game.
3. Run Stockfish yourself
Stockfish is the strongest open-source engine and is free. You can run it in a GUI such as En Croissant, Arena or SCID vs PC and load your PGN files. This gives you full control over depth and is great for deep study, but it takes setup and time.
4. Look across many games, not just one
Single-game analysis tells you what went wrong in that game. It doesn't tell you what goes wrong repeatedly. To improve faster, you want patterns: do you blunder mostly in the middlegame? Do you miss your opponent's mistakes? Is one opening losing you points? Do losses come from the clock?
That is what BlunderLens does for free: enter your Chess.com username, it fetches your recent public games through the official Chess.com public API, runs Stockfish 17 in your browser and ranks the 3 mistakes you repeat most, with example positions, a fix and a drill for each.
How to get the most out of any analysis
- Guess first, then check. Before opening the engine, write down where you think you went wrong. Then compare.
- Focus on the biggest swing. One blunder that loses a piece matters more than five small inaccuracies.
- Ask "why", not just "what". The engine shows the better move; you need to understand the threat you missed.
- Turn mistakes into drills. Set up the position again a few days later and try to find the right move.
Accuracy note
Browser-based analysis runs at a lower depth than a powerful desktop, so single moves should be treated as hints. Patterns across many games are much more reliable than any one evaluation.
See which of these mistakes you actually make
Enter your Chess.com username. Stockfish checks your recent games in your browser and shows the 3 mistakes you repeat most. Free, no signup.
FAQ
Is there a completely free way to analyse Chess.com games?
Yes. You can import PGNs into Lichess for free computer analysis, run Stockfish locally, or use BlunderLens for a free pattern report across your recent games.
Does BlunderLens need my Chess.com password?
No. It only uses your username and reads public game data from the Chess.com public API. No account or email is needed.
Is BlunderLens affiliated with Chess.com?
No. BlunderLens is an independent tool and is not affiliated with, endorsed by or sponsored by Chess.com.