Excel to JSON Converter

Open XLSX/XLS locally, choose a sheet, use the first row as headers, and download formatted JSON.

Excel file

Worksheet

Choose a workbookThe first worksheet row becomes object keys. Duplicate or blank header names are normalized.

CSV and spreadsheet boundaries

CSV has no universal schema or type system. Delimiter detection and type summaries are practical heuristics, while repairs create a new copy instead of silently altering the source. Excel conversion focuses on cell values and simple worksheets rather than promising perfect preservation of formulas, macros, charts, external links, formatting or every workbook feature.