File Tools
JSON to CSV
Validate JSON, flatten nested objects, choose fields and download an Excel-friendly CSV.
Your files are processed locally in your browser and are not uploaded.
Your CSV result will appear here.
Most tools work locally. Background removal and Document to Markdown upload selected files for server processing and delete them afterwards.
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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.
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