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Paste a JSON array or drop a file — get a clean CSV in one click. Choose comma, semicolon, or tab as your delimiter and download the result straight to Excel or Google Sheets. All conversion runs locally in your browser; your data never leaves your device.
Paste or upload JSON
Paste a JSON array or object into the input editor, or drag and drop a .json file anywhere on the page — files up to 5 MB are supported
Choose a delimiter
Select comma, semicolon, or tab to match your target application — comma for most tools, semicolon for Excel in European locales, tab for TSV
Click Convert
Click the Convert button — the CSV appears in the output panel instantly, with a row and column count
Copy or download
Click Copy to send the CSV to your clipboard, or click the download icon to save it as a .csv file ready for Excel, Google Sheets, or any data tool
The tool accepts a JSON array of objects (the standard case), a single JSON object (converted as one row), or a JSON array of primitives (converted as a single 'value' column). Deeply nested objects and arrays are serialised as compact JSON strings inside their CSV cell.
No. All conversion runs entirely in your browser using JavaScript. Your data is processed locally and is never sent to our servers.
Use comma for most tools and APIs. Use semicolon if you are opening the file in Excel with a European locale (where comma is the decimal separator). Use tab for TSV files compatible with databases and BI tools.
Nested objects and arrays are serialised as compact JSON strings inside their CSV cell and wrapped in double-quotes. To get flat columns for nested fields, flatten your JSON first before converting.
The tool collects the union of all keys across all objects. Missing values for a given row produce an empty cell. The column order follows the first occurrence of each key.
The tool accepts files up to 5 MB. Files over 1 MB show a performance warning because JSON.parse on large payloads can take several hundred milliseconds on slower devices.
Drag & drop a .json file anywhere on this page