How JSON to CSV conversion works
This tool reads your JSON file and converts data into CSV. For best results, use an array of objects, where each object becomes one row. Nested objects are flattened into columns so you can open the result in Excel or Google Sheets. Everything runs directly in your browser, nothing is uploaded or stored anywhere, making it a good option for private data.
When to use this tool
JSON is great for apps and APIs, but CSV is often easier for reporting and spreadsheets. JSON to CSV helps when you need tables, exports, or easy sharing.
- Spreadsheets: open API exports in Excel or Google Sheets.
- Reporting: turn nested data into flat, column-based tables.
- Imports: generate CSV formats that are accepted by many tools.
- Review and cleanup: scan data row by row and edit faster.
Need the “reverse” direction (CSV → JSON)? Try our CSV to JSON Converter. If you need a XML format instead, use this JSON to XML Converter.
Step-by-step: from JSON to CSV
Converting your JSON takes just a few seconds:
- Add your JSON files. Drag and drop files into the box above, or click to choose from your device.
- Choose delimiter. Pick comma, semicolon, tab, or pipe depending on where you will open the CSV.
- Choose flattening. Pick dot notation or bracket notation for nested keys.
- Convert to CSV. Click Convert to CSV. The tool processes everything directly in your browser.
- Save your output. Save files one by one or use the “Save all” button once everything is ready.
Privacy, limits and how this tool treats your files
FileYoga is built around a simple rule: your files stay with you. JSON to CSV conversion runs locally in your browser, so your data is never uploaded to FileYoga servers.
Local-only conversion
Conversion runs locally in your browser on your device. Your JSON is not uploaded, and the CSV output is generated on your side.
No hidden copies
When you clear the list or close the tab, the tool stops using your files and does not save copies on a server.
No artificial limits
No paywalls or quotas. The only limits come from your device’s memory and your browser.
No account required
Use the converter without signing up. Open the page, convert your files, and leave when you are done.
If you are working with sensitive data (customer exports, internal reports, financial lists), this setup means you keep full control from start to finish.
Tips for best results
- Use a JSON file that contains an array of objects for the cleanest table output.
- If your JSON is deeply nested, flattening can create many columns. Consider simplifying the JSON first if you need a smaller table.
- If values include commas, the converter will quote fields automatically so the CSV stays valid.
- Open in Excel? If your locale uses semicolons, choose Semicolon (;) delimiter.
Troubleshooting
- CSV has only one column: You may be opening a comma-delimited CSV in a locale that expects semicolons. Try Semicolon delimiter or import the file manually in your spreadsheet.
- Nested data looks messy: Choose a different flattening format or simplify the JSON structure before converting.
- Conversion fails: The JSON may be invalid (trailing commas, comments). Validate the JSON and try again.
- The tab freezes: Huge JSON files or very deep nesting can hit memory limits. Convert one file at a time and close other heavy tabs.
- Arrays inside objects: Arrays are stringified by default to keep one row per object. If you need separate rows for arrays, reshape your JSON first.
Frequently asked questions
No. Conversion runs locally in your browser. Your JSON is never uploaded to FileYoga servers, and the CSV is generated on your device.
A JSON array of objects works best. Each object becomes one row, and keys become CSV columns.
Nested objects are flattened into one row using your chosen format, like
user.name (dot) or user[name] (brackets).
Arrays are kept in a single cell as JSON text so the output stays “one object = one row.” If you need expanded rows, reshape your JSON first.
That’s usually a delimiter/locale mismatch. Try Semicolon delimiter, or use Excel/Sheets “Import” and select the delimiter manually.
Yes. Cells are quoted when needed, and quotes inside values are escaped so the CSV remains valid.
The converter builds columns from all keys it finds. Missing values are left blank for rows that don’t contain a given key.
The tool will try to find an array inside the object. If none is found, it converts the object as a single-row CSV.
No artificial limit. Very large or deeply nested JSON can slow your browser or hit memory limits—convert one file at a time if needed.