JSON to CSV Converter

Nested values (objects within objects, arrays within objects) are serialized to JSON string representation and placed in the CSV cell. For example, "address": {"city":"NYC"} becomes the cell value {"city":"NYC"}. If you need each nested field as its own column, flatten your JSON before converting.

Three options: Comma (standard .csv, default for most tools), Semicolon (common in European locales where Excel uses semicolons), and Tab (produces a .tsv file, good for data with embedded commas). Choose based on your target application — European Excel users typically need semicolons.

Download the CSV file and open it in Excel (File > Open) or import in Google Sheets (File > Import). If Excel does not split the columns correctly, it may have read the wrong delimiter — use Data > Text to Columns and specify the correct delimiter, or re-export with semicolons if you are in a European locale.

The tool collects all unique keys from all objects and uses them as CSV headers. Objects missing a key get an empty cell for that column. For example, if half your objects have an "email" field and half don't, the "email" column will have blanks for the rows without it.

Yes. The "Include headers" toggle controls whether the first CSV row contains column names (derived from JSON keys). Turn headers off if your target system already knows the column order and doesn't need a header row, or if you are appending to an existing CSV file.

Yes. The Download button saves the output as a .csv file. The filename is "converted.csv". You can also copy the CSV text to the clipboard and paste it directly into a spreadsheet.

No. The entire conversion runs in your browser via JavaScript. Your JSON never leaves your device, making it safe for API responses containing sensitive data, internal records, or personally identifiable information.