CSV ↔ JSON converter
Turn CSV rows into a JSON array of objects (using the first row as keys), or convert a JSON array back into CSV. Quoted fields, embedded commas and newlines are handled. Everything runs in your browser, so your spreadsheet data never leaves your device.
CSV ↔ JSON converter
Convert CSV to JSON and back
0 bytes of your file have left this device. Counted live in this tab, not claimed — open your browser’s Network tab and watch.
How it works
- 1
Paste your input on the left.
- 2
Pick a mode if the tool has one — the result updates instantly.
- 3
Copy the output with one click. Nothing is ever uploaded.
Frequently asked questions
Does it handle quoted commas?
Yes. Fields wrapped in double quotes can contain commas, quotes and line breaks — they are parsed correctly per RFC 4180.
Is my data uploaded?
No — parsing happens entirely in your browser, so your CSV/JSON never leaves your device.