Enjoy a cleaner, simpler CSVJSON. Leave feedback or ask for features here.
Press ⌘V / Ctrl+V to paste your data — anywhere on this page
Drag & drop, or
Paste CSV or JSON into the left pane and the conversion runs as you type — no upload, no submit button. Flip the direction with the switch between the panes to convert JSON back to CSV, then copy the result or download it as a file. The converter understands quoted fields, embedded separators, and Unicode.
Separator picks the delimiter — auto-detect covers comma, semicolon, and tab. Parse numbers is on by default with smart semantics — plain numbers like 5 or 19.99 become real JSON numbers, while leading-zero values like 00721 and very long IDs stay strings; uncheck it to keep every cell a string. Parse JSON converts null, true, false, [] and {} cells into real JSON values instead of strings. Transpose flips rows and columns; Hash output makes the first column the object key; Minify removes indentation from JSON output. On the JSON to CSV side, Flatten explodes nested arrays into extra rows with dotted keys.
Only the delimiter: TSV separates cells with tabs, CSV with commas. Anything you can paste from Excel or Google Sheets is tab-separated, and auto-detect picks that up — or choose Tab in the separator menu. Quoting rules only apply to comma and semicolon output; TSV rarely needs them.
No. The conversion runs entirely in your browser — nothing is uploaded, nothing is stored, nothing is logged. Files you open are read locally in the page, there is no account and no server processing. The site's analytics never see your data: Plausible counts visits cookieless, and the Google tag is a standard conversion-measurement tag that uses the page URL, referrer, and a first-party conversion cookie to measure ad performance. Your files and converted output never leave the browser. When you send feedback, we store your vote and anything you choose to write — nothing else.