ToolPronto
Convert JSON to CSV or CSV to JSON
Convert flat tabular JSON and CSV locally with spreadsheet-safe output.
JSON & CSV Converter
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What this tool does: JSON & CSV Converter
Convert flat tabular JSON and CSV locally with spreadsheet-safe output. Your input and results stay in this browser tab. The operation runs locally, and the page explains the exact scope before you reuse the output. Nested JSON and unlimited files are excluded; values stay as text unless the format requires otherwise.
Useful for: JSON & CSV Converter
- Use JSON & CSV Converter for a quick one-off result without installing another app.
- Useful for work involving json to csv, csv to json, data converter.
- Choose it when browser-only processing matters and this boundary fits the task: Nested JSON and unlimited files are excluded; values stay as text unless the format requires otherwise.
How to use it
- Enter or paste the content you want to process.
- Choose the relevant mode and run the tool.
- Review the result, then copy it if needed.
Example: export a small table without opening a spreadsheet
Paste an array such as [{"name":"Ada","score":9},{"name":"Lin","score":8}] to create CSV columns. For the reverse direction, use one header row and consistent columns so each CSV row becomes one JSON object.
If conversion reports an error
JSON must be a valid top-level array of flat objects, not one object or nested data. For CSV, check the selected delimiter, header row, and unmatched quotes. The message identifies the first problem instead of silently changing the data.