How to convert JSON to CSV or Excel

Paste a JSON array into the input box, or click Upload .json file to load a file from your device.
Select the output format: CSV for spreadsheet import, or Excel (.xlsx) for direct use in Microsoft Excel or Google Sheets.
Click Convert & Download. The file downloads instantly, nothing is sent to a server.

What JSON structure does this tool expect?

The converter expects a JSON array of objects where each object shares the same keys. Those keys become column headers in the output file, and each object becomes one row.

[{"name":"Alice","age":30},{"name":"Bob","age":25}]

Nested objects are flattened to a single level. Arrays inside objects are serialized as strings. If your JSON is a single object rather than an array, wrap it in square brackets first.

CSV vs Excel: which format should you choose?

CSV is plain text, every tool understands it. Use CSV when you plan to import into a database, process with Python or R, or share data across different software environments. Google Sheets and LibreOffice open CSV files without any conversion step.

Excel (.xlsx) preserves data types: numbers stay numbers, dates stay dates, and you get proper column widths. Use Excel when you are handing off a file to a colleague who works primarily in Microsoft Office, or when formatting matters.

Common use cases

API responses: export data from a REST API into a spreadsheet for analysis or reporting
Database exports: convert MongoDB or Firestore JSON dumps to tabular format
Configuration auditing: turn JSON config files into a readable table for review
Data migration: prepare JSON data for import into a system that only accepts CSV

Privacy

All conversion happens in your browser using the JavaScript File API and the SheetJS library. No data is uploaded, logged, or stored anywhere. You can disconnect from the internet and the tool still works.