Convert JSON to CSV and CSV to JSON online

Convert JSON to CSV and CSV to JSON in one tool.

Local conversion: no data is uploaded

Input dataJSON

Result

CSV

Need to fix or remap the data too?Open Data Transformer

Convert JSON to CSV or CSV to JSON directly in your browser. The converter handles JSON objects and arrays, quoted CSV fields, embedded newlines and automatic delimiter detection without uploading data to a server.

How to use this tool

Choose JSON → CSV or CSV → JSON.
Paste a JSON object, an array of objects or CSV with a header row. Click Convert.
Review the result, then copy or download it. Open Data Transformer to adjust columns and values before converting.

Example input and result

Convert a JSON array into a CSV table. The reverse conversion uses headers as property names and returns string values.

Input

[{"name":"Alice Test","city":"Rome"},{"name":"Bob Test","city":"Milan"}]

Result

name,city
Alice Test,Rome
Bob Test,Milan

Supported formats

CSV can use comma, semicolon or tab delimiters. The delimiter is detected from the first row; CSV output uses commas. Values containing commas, quotes or line breaks are quoted.

JSON must be an object or an array of objects. Properties found in different records become columns in the same table; missing or null values become empty cells.

Limits and useful checks

Conversion does not preserve JSON types: numbers and booleans become strings. Nested objects and arrays are serialized inside a cell, without creating columns for their inner properties.
The tool converts tabular data, not Excel .xlsx files. Arrays of numbers, strings or other arrays are not supported JSON inputs.

Frequently asked questions

Is my data uploaded to a server?

No. Conversion runs in your browser; copying and downloading work without an account.

Why does conversion return an error?

Check that your JSON has no trailing commas and that property names use double quotes. For CSV, make sure every opening quote has a closing quote.

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Supported formats

CSV can use comma, semicolon or tab delimiters. The delimiter is detected from the first row; CSV output uses commas. Values containing commas, quotes or line breaks are quoted.

JSON must be an object or an array of objects. Properties found in different records become columns in the same table; missing or null values become empty cells.

Limits and useful checks

Conversion does not preserve JSON types: numbers and booleans become strings. Nested objects and arrays are serialized inside a cell, without creating columns for their inner properties.

The tool converts tabular data, not Excel .xlsx files. Arrays of numbers, strings or other arrays are not supported JSON inputs.