Is my JSON or CSV uploaded to Convertr?

No. Conversion runs entirely in your browser. Pasted data, headers, field names and values are not uploaded to Convertr servers.

How are nested JSON objects converted to CSV?

Nested object keys are flattened with dot notation. Arrays inside objects are encoded as JSON strings so each CSV cell keeps the original value.

Which CSV delimiters are supported?

The converter supports commas, semicolons, tabs and pipes. Auto-detect chooses the delimiter that creates the most consistent rows.

Can I convert CSV with quoted fields and line breaks?

Yes. The CSV parser supports quoted fields, escaped quotes, commas inside quotes and multiline values.

JSON to CSV Converter

Flatten JSON into CSV or turn CSV rows into JSON locally in your browser. Useful for API responses, logs, exports and spreadsheet cleanup.

Wprowadź JSON

0 znaków

Output CSV

Wynik pojawi się tutaj. Wszystko działa w Twojej przeglądarce.

Gotowe

Conversion options

Direction CSV delimiter First CSV row is header Use header names as JSON object keys when converting CSV. Pretty JSON output Turn off to produce compact JSON for CSV to JSON conversion.

Nested object keys use dot notation. Arrays and nested values inside cells are preserved as JSON strings. Analytics uses size and count buckets only, never pasted content or field names.

API response flattening

Turn arrays of objects, single objects and mixed keys into a predictable CSV table.

CSV import prep

Convert spreadsheet exports into JSON arrays while preserving quoted fields and multiline values.

Prywatne przetwarzanie lokalne

Conversion runs in JavaScript on your device. There is no upload endpoint for pasted JSON or CSV.

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Formatter CSV

Validate rows and delimiters

Extract Tables from PDF

Create CSV from PDF tables

Narzędzia dewelopera

Więcej narzędzi natywnych dla przeglądarki

API response flattening

CSV import prep

Prywatne przetwarzanie lokalne

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Settings