Chess Board Editor
Drag pieces into place, load classic positions, edit every FEN field and check for impossible setups.
Drag a palette piece onto a square, or pick a piece and click. Right-click a square to delete the piece on it, or focus a square and press Escape to drop the current selection.
Piece palette
White
Black
Select a piece to stamp it on the board, or drag one straight from the palette onto a square.
Board actions
Mirror reflects the files left to right and swaps the colours, so the result is the mirror image of the position. Castling rights follow the colours and are dropped where they no longer fit the home squares, and an en passant target is cleared because a reflected pawn never just moved two squares.
The initial array: all 32 pieces on their home squares, White to move.
Export
FEN
Legality check
Position looks legal — 32 pieces, no rule breaches found.
About this tool
The Chess Board Editor builds and edits chess positions: drag the twelve piece glyphs onto the board, move or delete them, load classic positions, edit all six FEN fields and copy the result as a FEN string or a PNG.
The legality check is real logic rather than a stub — it implements pawn, knight, bishop, rook, queen and king attack detection with sliding blockers, then flags impossible positions such as a missing or duplicated king, two kings in check at once, adjacent kings, pawns on the back rank, impossible piece counts, and castling or en passant fields that do not match the board. Everything runs entirely in your browser: no uploads, no accounts and no network calls.
- 100% free — no account needed
- Runs in your browser
- Nothing is uploaded
Frequently asked questions
Is Chess Board Editor really free?
Yes. Chess Board Editor is completely free on PureBrowser — every feature, with no account, no trial, and no credit card.
Does Chess Board Editor upload my data?
No. Chess Board Editor runs entirely inside your browser, so anything you type, paste, or open stays on your own device.
Do I need to sign up or install anything?
Neither. There is no account and nothing to download — open the page and Chess Board Editor is ready to use on desktop or mobile.
Does Chess Board Editor work offline?
Once the page has loaded, yes. All of the processing happens locally in your browser, so it keeps working without a connection.
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