Town Office · room 5
CSV / JSON to Excel
Convert CSV or JSON data into an XLSX spreadsheet.
🔒 Processed in your browser · No upload · No sign-up
Drop a CSV, TSV or JSON file or click to browse
You can also paste from the clipboard. Files stay on your device.
…or paste data
Convert CSV or JSON to Excel
Turn comma-, semicolon- or tab-separated text, or a JSON array of objects, into a real Excel spreadsheet. Numbers and dates are stored as proper cell values (not text), column widths are sized to fit, and you can choose XLSX, legacy XLS or OpenDocument ODS. The file is built in your browser with SheetJS — your data is never uploaded.
Why do my CSV files look broken when opened directly in Excel?
Excel guesses the delimiter and encoding from your system's regional settings, which often splits columns wrongly or garbles accented characters. Converting to .xlsx first avoids both problems.