About Excel JSON CSV Converter
Excel JSON CSV Converter brings four common structured-data conversions into one browser-local workspace. Open XLSX or XLS files, paste JSON or CSV, preview normalized rows and export the format you need without sending the source data to a server.
How to use Excel JSON CSV Converter
- 1
Choose Excel → JSON, JSON → Excel, JSON → CSV or CSV → JSON.
- 2
Select a source file or paste JSON or CSV text directly into the input area.
- 3
For Excel, choose the workbook sheet. For Excel or CSV, set the row that contains column headers.
- 4
For JSON, optionally flatten nested objects into dot-path columns such as user.name.
- 5
Review up to the first 100 rows in the preview and download the converted JSON, CSV or XLSX file.
Tips for better results
- Use a clean header row with unique column names before converting tabular data.
- Enable nested JSON flattening when the destination is Excel or CSV and you want nested properties to become columns.
- Keep a copy of the original workbook when formulas, cell formatting or multiple-sheet structure matter; this tool converts table data rather than reproducing workbook presentation.
Frequently asked questions
Which file formats can I use?
Check the file picker and tool description for the supported formats. Available formats can vary by tool.
Which Excel formats are supported?
The tool accepts XLSX and XLS workbooks and lets you choose which sheet to convert.
Will formulas and Excel formatting be preserved?
No. The converter focuses on table values and column structure. Workbook styling, formulas and layout are not preserved as editable Excel features during round-trip conversion.