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Excel を JSON に変換

Excel から JSON へ

ブラウザで動作 · アップロード不要

このツールとページ内の説明は、現在は英語のみです。動作は同じで、すべてブラウザ内で実行されます。

Drag & drop an Excel file here

or

Excel .xlsx or .xlsm, or OpenDocument .ods (LibreOffice)

Your files stay on your device. Nothing is uploaded.

  • 何も端末から出ません
  • サーバーによるサイズ制限なし
  • 登録不要・透かしなし
  • 無料

How to convert Excel to JSON

  1. Choose an .xlsx, .xlsm or .ods file.
  2. Pick the sheet and the JSON layout.
  3. Download the JSON, or copy it.

JSON layouts

  • List of objects: the first row gives the names, for example [{"Name": "Ann", "Age": 34}].
  • List of rows: every row as an array, including the first.
  • Empty first-row cells are named "Column 3" and so on; repeated names get "(2)".

Values

  • Numbers stay numbers, TRUE/FALSE become true/false, empty cells become null.
  • Dates become text like "2024-03-01".
  • Values are what the spreadsheet app last calculated.

Your spreadsheet stays on your device

Everything happens in your browser. Your spreadsheet is never uploaded, and this site's security policy blocks the page from sending files anywhere.

よくある質問

Can it read Google Sheets?

Download the sheet from Google Sheets as .xlsx (File › Download), then open that file here.

Is my spreadsheet uploaded?

No. It is processed in your browser and never sent anywhere.