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Excel to JSON Converter

Convert XLSX files to JSON arrays of objects. Uses first row as keys, supports multiple sheets, JSONL output, and nested grouping. Pure JS — no SheetJS dependency.

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Convert XLSX files to JSON arrays of objects. Uses first row as keys, supports multiple sheets, JSONL output, and nested grouping. Pure JS — no SheetJS dependency. Everything runs locally in your browser — your data never leaves your device.

How to use

  1. Enter your input in the tool above.
  2. Adjust any options to your preference.
  3. Use the Copy or Download buttons to save the result.
  4. Everything happens locally — your data never leaves your browser.
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