JSON ⇄ CSV Converter
Convert JSON to CSV and CSV to JSON instantly in your browser.
100% client-side · your data never leaves your browser.
Frequently Asked Questions
Common questions about JSON ⇄ CSV Converter
Paste a JSON array of objects (or a single object) into the input and the tool instantly produces CSV with a header row built from the union of all keys. You can pick the delimiter and download the .csv file. Everything runs locally in your browser.
Yes. Nested objects and arrays inside a cell are JSON-stringified so no data is lost. For deeply nested structures, the cell contains the stringified JSON value, which you can re-parse later if needed.
Yes. Switch to CSV → JSON mode and paste your CSV. The parser correctly handles quoted fields, escaped double-quotes, and newlines inside quotes, then outputs a pretty-printed JSON array of objects keyed by the header row.
No. The conversion is 100% client-side. Your JSON and CSV never touch a server, are never stored, and are never logged.