twineconvert

free · in-browser · no upload

PGN to FEN
Converter

Drop your PGN file. We'll convert it to FEN right here in your browser, your file never leaves your device.

PGN
to
FEN

Select your file here to get started

or drop your file here.

Accepts .pgn

nothing uploaded no file size cap no signup

How it works

Three steps. No upload, no signup.

  1. 1

    Drop your file

    Click the dropzone above or drag a PGN from your desktop. Files of any size, there's no upload, so there's no upload limit.

  2. 2

    Convert in your browser

    The conversion runs entirely in this tab using JavaScript and WebAssembly. Your file never touches our servers, we don't have any.

  3. 3

    Download

    Get your FEN the moment the conversion finishes. Convert another, or close the tab.

Files stay on your device

Your file is never uploaded. The entire conversion runs in your browser using WebAssembly. We can't see what you convert because we have no server to see it.

No file size limit

Server converters cap free users at 1-2 GB and gate larger files behind a paid plan. Since nothing uploads, our limit is whatever your browser can handle.

Free, no signup, no ads on conversions

No account required. No watermark on the output. No queue. Drop a file, get a converted file.

Formats involved

About PGN and FEN

PGN, Portable Game Notation

PGN is the universal text format for chess games, every chess engine, every chess server (chess.com, lichess), every analysis tool reads it. A PGN file is a sequence of game blocks; each block has 7-tag headers (Event, Site, Date, Round, White, Black, Result) followed by the moves in algebraic notation. A single PGN file can contain thousands of games.

How to open

chess.com, lichess.org (paste it into the analysis board), ChessBase, Scid, every chess engine. Plain text in any editor.

Full PGN format guide →
FEN, Forsyth–Edwards Notation

FEN is a single-line text representation of one chess position, piece placement, side to move, castling rights, en passant target, halfmove clock, and fullmove number. Used by chess engines for position analysis, by chess servers for sharing puzzles, and by GUIs for board setup. Unlike PGN (which represents a game), FEN represents a single static position.

How to open

Any chess engine, GUI, or website's analysis board. Just paste the FEN string.

Full FEN format guide →

Convert your PGN to other formats

How we compare

PGN → FEN vs the alternatives

FeatureUstwineconvertCloudConvertiLovePDFFreeConvertSmallpdf
Files uploaded to a server
Free file size limitNo limit1 GB200 MB1 GB5 GB
Free conversions per dayUnlimited10/dayLimitedLimited2/day
Signup required
Watermark on output
Works offline (after first load)

Last verified May 2026 from each competitor's pricing and FAQ pages. Limits and pricing change frequently.

FAQ

Common questions

Is this PGN → FEN converter really free?

Yes. No signup, no watermark, no daily file count limit. Every conversion runs in your browser, your file never touches our servers because there are no servers.

Where does my file go when I convert it?

Nowhere. The conversion runs entirely in your browser using JavaScript and WebAssembly. Your file is never uploaded to our servers. We don't have any servers handling files, there's nothing for us to log, store, or accidentally leak.

What's the maximum file size?

Whatever your browser can hold in memory. Practically, this means a few hundred MB on most computers, significantly larger than the 1-2 GB caps that server-upload converters charge for. Very large files (multi-GB) may require closing other browser tabs first.

Why convert PGN to FEN?

Sharing and analyzing chess games. Sharing chess positions for analysis. The most common reason to convert is compatibility, FEN works in places where PGN doesn't, or vice versa.

How do I open a PGN file in the first place?

chess.com, lichess.org (paste it into the analysis board), ChessBase, Scid, every chess engine. Plain text in any editor.

Does this work offline?

Once the page is loaded, the conversion itself runs entirely offline. The first time you use a tool, your browser downloads the conversion library (a one-time cache). If you reload while offline, the page won't load, but you can install the site as a Progressive Web App for full offline use.

Can I convert multiple files at once?

Single file at a time for now. Batch conversion is on the roadmap, for now, drop one file, download the result, then convert the next.