100% Client-Side

Live Chess Game Analysis with Free Eval Bar Online

Analyze any chess game online with a live evaluation bar powered by Stockfish — the world's strongest open-source chess engine. Paste a live game link from chess.com or Lichess and watch the eval bar update in real time, or upload a board screenshot to get instant position analysis. 100% free, no signup, runs entirely in your browser.

Key Features

  • Live Eval Bar — Real-time Stockfish evaluation bar shows who's winning during any live chess game
  • Live Game Tracking — Paste a Lichess or chess.com game URL and follow along with engine analysis move-by-move
  • Screenshot to FEN — Upload or paste (Ctrl+V) any chess screenshot; get the exact FEN position in under 500ms using pure computer vision
  • Stockfish Engine — Full-strength Stockfish running in-browser via WebAssembly. See top 3 engine lines, depth, and centipawn evaluation
  • Interactive Board Editor — Drag pieces to correct any position, flip the board, set castling rights
  • Open in Lichess — One click to continue deeper analysis on Lichess with the current position
  • Zero Lag Tracking — With a free Lichess Board API token, get instant move updates with zero polling delay

How to Use the Live Chess Eval Bar

  1. Paste your live game URL in the "Live Game Tracking" box (supports Lichess and chess.com links)
  2. Click "Track" — the eval bar appears instantly showing Stockfish's evaluation
  3. Watch the evaluation update after each move in real time
  4. Click "Analyze" at any point to see the best move, top engine lines, and alternative variations

How to Analyze a Chess Screenshot

  1. Take a screenshot of any chess position (chess.com, Lichess, a book, a stream, any 2D board)
  2. Upload or paste (Ctrl+V) the image into the analyzer
  3. The tool detects the board, identifies all pieces, and outputs the FEN in under 1 second
  4. Use the eval bar and Stockfish to find the best move, or click "Open in Lichess" for deeper analysis

Supported Platforms

Works with screenshots and live game links from: chess.com (all piece themes and board colors), Lichess (all themes), Chessify, Chess24, ChessKid, 365chess, Chess Tempo, and virtually any 2D digital chess board. Also works with photos of printed chess diagrams and book positions.

Why Choose This Over Other Chess Analysis Tools?

  • Completely free — No premium tiers, no credit card, no "5 analyses per day" limit
  • No download required — Runs in your browser. No app install, no Java, no extensions
  • Private — Your positions and games are never sent to any server. Stockfish runs locally
  • Screenshot support — Unlike Lichess analysis or 365chess, you can paste any board screenshot directly
  • Live tracking — Unlike ChessCompass or DecodeChess, track live games with a real-time eval bar
  • All-in-one — Combines screenshot OCR + live game tracking + Stockfish eval + board editor in one tool
Frequently Asked Questions about Live Chess Analysis
How do I get a live eval bar for my chess game online?
Paste your live game link (Lichess or chess.com) into Aya Corporation's Chess Analyzer. The built-in Stockfish engine instantly shows a live evaluation bar with best-move arrows — no download, no signup, completely free.
Can I analyze a chess.com or Lichess game in real time?
Yes. Enter your game URL in the Live Game Tracking section. The tool follows the game move-by-move, showing the eval bar and Stockfish's top 3 engine lines with zero lag if you provide a Lichess Board API token, or ~2 second polling without one.
How does the chess screenshot to FEN feature work?
Upload or paste (Ctrl+V) any chess screenshot. The tool uses pure computer vision (no AI cloud calls) to detect the board grid, identify all 64 squares and piece types, then outputs the exact FEN string in under 500 ms. Works with chess.com, Lichess, Chessify, ChessKid, and any 2D board theme.
Is this chess analysis tool really free?
100% free with no limits. No account required, no ads, no data sent to servers. The Stockfish engine runs directly in your browser via WebAssembly for maximum privacy and speed.
What is the best free alternative to Lichess analysis board?
Aya Corporation's Live Chess Analyzer offers Stockfish evaluation, an interactive board editor, live game tracking with eval bar, and screenshot-to-FEN — all in one tool. Unlike Lichess analysis, it also supports pasting screenshots directly and tracking chess.com games.
Does it work on mobile?
Yes. The tool is fully responsive and works on iOS and Android browsers. Upload screenshots from your camera roll or paste from clipboard.