Convert JSON to CSV online, free. JSON is the dominant data-interchange format for web APIs and config. CSV is a flat, row/column tabular format every spreadsheet and database understands. JSON to CSV conversion parses your JSON against the ECMA-404 / RFC 8259 grammar (https://www.rfc-editor.org/rfc/rfc8259), builds an in-memory model of its keys, nested objects and arrays, then re-serializes it as valid CSV following the RFC 4180 conventions. Processing runs in your browser in JavaScript with no upload or server round-trip — no size limit beyond your device's memory, so multi-megabyte documents convert in milliseconds and sensitive payloads never leave your machine. Typical uses include spreadsheet import/export, database bulk loads and data analysis pipelines.
It maps the full structure of your JSON onto well-formed CSV, following the RFC 4180 conventions. 100% free, no registration, and complete privacy — everything runs locally in your browser, so your data never touches a server.
Paste JSON and convert CSV immediately. Conversion runs client-side, so there is no upload wait and large documents stay fast.
Nested JSON objects, tables and arrays are mapped faithfully onto CSV.
Your JSON never leaves your device — everything is processed locally in JavaScript, with nothing logged or stored.
Unlimited conversions with no account, no quotas, and no watermark. Works on desktop and mobile.
A JSON document and its CSV equivalent:
JSON input:
{
"name": "Alice",
"age": 30,
"email": "[email protected]"
}Output:
name,age,email
Alice,30,[email protected]Paste your JSON into the editor and press "Convert to CSV". The tool parses it against the ECMA-404 / RFC 8259 grammar, then re-serializes it as CSV following RFC 4180 conventions — instantly and entirely in your browser. You can validate or format the JSON first to be sure it is clean.
JSON already uses objects, arrays and typed scalars, so mapping to CSV is close to one-to-one: objects become nested structures, arrays become lists, and numbers, booleans and null keep their types.
Numbers, booleans and null are preserved as native CSV types wherever CSV supports them, so standard documents convert losslessly and can be read back into the same structure.
JSON (JavaScript Object Notation) (JSON) — JSON is the dominant data-interchange format for web APIs and config. CSV (Comma-Separated Values) (CSV) — CSV is a flat, row/column tabular format every spreadsheet and database understands. This converter maps the structure of your JSON onto CSV so you can use it for spreadsheet import/export.
Yes. Invalid JSON is flagged with a clear error before anything is converted. Common JSON problems to check are matched braces and brackets, double-quoted keys, and no trailing commas. Starting from clean input keeps the generated CSV accurate.
Yes. The entire JSON-to-CSV conversion runs locally in your browser in JavaScript — your JSON is never uploaded, logged or stored. That matters when the data is something like REST/GraphQL API payloads, which should not leave your machine.
The generated CSV is ready for spreadsheet import/export, database bulk loads and data analysis pipelines. Copy or download it and drop it straight into your tooling.
This powerful tool instantly converts JSON data into CSV format. Simply paste your JSON structure on the left, and the corresponding CSV will be automatically generated on the right. You can easily copy the CSV output and use it in your spreadsheets or other data-processing applications. The tool intelligently handles the conversion, but it's recommended to double-check the output for accuracy. This tool simplifies working with CSV files by quickly converting JSON data into the CSV format you need.
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