Convert JSON to CSV
Turn arrays or objects into spreadsheet-ready CSV.
Local converter
Processed in your browser. Files do not leave your device.
Overview
JSON to CSV converts object-shaped JSON into rows and columns in the browser. It is the second data-tool preview built on the shared local worker, validation, and download path.
Use Cases
- Convert API response samples into spreadsheet-readable rows.
- Flatten simple nested objects into dot-separated CSV columns.
- Prepare JSON exports for review in spreadsheet software.
Limitations
- This preview accepts a top-level object or an array of objects.
- Deeply nested objects are flattened only up to the selected depth.
- Arrays, primitive-only JSON, and very large files fail with normalized local errors.
FAQ
Does this JSON to CSV converter upload my file?
No. The selected JSON file is read by the browser and processed through a local worker for this preview tool.
How are nested JSON fields handled?
Plain nested objects are flattened into dot-separated column names up to the selected flatten depth. Unsupported shapes produce a local error message.
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Keep the first copy of each CSV row and remove later duplicates.
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