How does JSON to CSV conversion work?

The converter reads a JSON array of objects, collects every unique key across all objects as CSV column headers, then writes one row per object. Missing keys in an object produce empty cells.

What happens to nested JSON objects?

Nested structures are flattened using dot notation — {"user":{"name":"A"}} becomes a column called user.name. Arrays inside objects can be joined into a single cell or expanded depending on your needs.

Will the CSV open correctly in Excel?

Yes. Fields containing commas, quotes, or line breaks are properly escaped with double quotes per RFC 4180, so Excel, Google Sheets, and Numbers parse the file correctly.

Can I convert a single JSON object instead of an array?

Yes — a single object converts to a two-row CSV (headers plus one data row). Objects keyed by ID can also be converted by treating each value as a row.

Is my JSON data kept private?

Completely. Conversion happens in your browser with no upload — API responses containing user data or tokens never reach any server.

JSON to CSV Converter — Free Online JSON to Excel CSV Tool -...

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JSON to CSV Converter — Make API Data Spreadsheet-Ready

APIs speak JSON; stakeholders read spreadsheets. This free converter turns any JSON array of objects into a properly escaped CSV file that opens cleanly in Excel and Google Sheets — headers auto-detected, nested objects flattened, special characters escaped per RFC 4180. Paste, convert, download. Nothing uploads; everything runs in your browser.

Example Conversion

Input JSON:

[
  { "id": 1, "user": { "name": "John", "plan": "pro" }, "mrr": 49 },
  { "id": 2, "user": { "name": "Anna", "plan": "free" }, "mrr": 0 }
]

Output CSV:

id,user.name,user.plan,mrr
1,John,pro,49
2,Anna,free,0

The nested user object flattens into user.name and user.plan columns — the standard approach that keeps every data point addressable in a flat table.

Where This Saves Time

Reporting — hand API exports to non-technical teammates as familiar spreadsheets.
Data analysis — pivot tables, filters, and charts need tabular input.
Database and CRM imports — most bulk-import tools accept CSV, not JSON.
Auditing API responses — scanning 500 records is far easier in a grid than in nested braces.

Edge Cases Handled Correctly

Objects with different key sets merge into a superset of columns with empty cells where a key is absent. Values containing commas, double quotes, or newlines are quoted and escaped so the CSV never breaks. Unicode passes through as UTF-8. Numbers and booleans convert to their plain text form, and null becomes an empty cell rather than the string "null".

Free and Private

No signup, no size limits beyond browser memory, and no server round-trip — safe even for JSON containing customer PII or internal metrics.

Json To Csv

Result