CSV ToolsLocal
CSV to JSON
Convert CSV rows into structured JSON arrays.
CSV Tools
JSON to CSV
Turn JSON into clean CSV output that is ready to export.
InputJSON
OutputSpreadsheet-ready CSV
Works onAny modern browser
About this tool
Converts JSON data into CSV rows and can flatten nested keys into dot-notation columns.
Common use cases
- Export JSON data into spreadsheet-friendly CSV output.
- Flatten arrays of objects into rows for reporting or manual review.
How to use it
- Paste JSON or upload a .json file.
- Enable flattening if your data contains nested objects.
- Convert and download the CSV result.
Best for
- Exporting structured JSON data into spreadsheet-friendly rows
- Flattening object arrays for reporting or business review
- Creating a CSV download without writing a one-off script
Input and output notes
- Accepted inputs: .json.
- Exports are generated locally in the current browser session.
Limits to know
- Large inputs can still be limited by browser memory.
- Unusual delimiters or quoting patterns may need manual confirmation.
Privacy
This tool runs in the browser, so pasted content and uploaded files stay on the current device during normal use.
Common next steps
Pick the right CSV workflow
CSV to JSON is for imports into apps and APIs
Use it when spreadsheet rows need to become JSON arrays that code and APIs can consume.
JSON to CSV is for exports and reportingUse it when structured objects need to become rows that business users can open in spreadsheet tools.
CSV Cleaner is for rough files before conversionStart with cleanup when whitespace, duplicate rows, or inconsistent headers will break the next step.
Common questions
What JSON shape works best?
JSON arrays of objects are ideal. Single objects are wrapped into one CSV row automatically.
How are nested objects handled?
When flattening is enabled, nested keys become dot-separated columns such as profile.name.