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Excel to JSON Converter

Instantly convert Excel files to JSON with drag and drop

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Excel→JSON変換

Excelファイルをドラッグ＆ドロップ

About Excel to JSON Converter

The Excel to JSON Converter reads .xlsx files and prepares them as JSON for web APIs, NoSQL databases, configuration files, automation scripts, and data review workflows. It is useful when product lists, inquiry exports, internal master tables, or spreadsheet-based operational data need to be turned into structured data.

The tool uses SheetJS (the xlsx library) and lets you choose the target sheet from workbooks that contain multiple sheets. You can switch between header mode, which uses the first row as JSON keys, and array mode, which outputs rows with column-based positions. Output indentation can be minified, 2 spaces, or 4 spaces, so you can choose compact JSON for integration work or formatted JSON for review.

The converted JSON can be reviewed on screen, copied to the clipboard, or downloaded as a JSON file. The browser-based workflow is convenient when you want to avoid adding another external upload step to a spreadsheet conversion process. Sheet selection, header handling, output sizing, copy, and download are available in one place for data migration preparation and quick validation tasks.

How to use Excel to JSON Converter

  1. Drag and drop your Excel file (.xlsx) onto the drop zone, or click to select it.
  2. If the file contains multiple sheets, select the desired sheet from the dropdown menu.
  3. Configure the 'Use first row as header' option and indentation width (minified, 2, or 4 spaces).
  4. Click 'Convert' to transform the data into JSON. The output size in KB will be displayed. Use 'Copy' to copy to clipboard or 'Download' to save as a JSON file.

Benefits of Excel to JSON Converter

  • [Excel reading with SheetJS] Uses SheetJS (the xlsx library) to read sheet structure, cell values, date data, and formula result values from Excel files. For workbooks with multiple sheets, you can choose the sheet to convert.
  • [Flexible output options and size review] Choose header mode or array mode, then select minified, 2-space, or 4-space indentation. The JSON output size is shown so you can review the format before API integration or database import.
  • [Copy and download workflow] Review the converted JSON on screen, copy it to the clipboard, or save it as a JSON file. Spreadsheet lists can be prepared more easily for development, analysis, or business automation tasks.

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