File Tools
JSON to CSV
Validate JSON, flatten nested objects, choose fields and download an Excel-friendly CSV.
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How to use
- Paste JSON or choose a file containing an object or object array.
- Enable flattening, choose array handling and a delimiter, then review the generated table.
- Copy the escaped CSV or download it with an optional UTF-8 BOM.
Great for
- Opening API data in Excel
- Preparing a spreadsheet import
- Sharing structured records
Good to know
CSV is a flat format; nested arrays are represented as JSON text or a chosen joined string.
Frequently asked questions
Why add a UTF-8 BOM?
Excel on some systems uses the BOM to recognize UTF-8 and display Chinese characters correctly.